American Mineralogist, Volume 63, pages 424427, 1978
NEW MINERAL NAMES*
MtcHe,sl FLuscHnR, Lours J. CABRT,
Geoncs Y. CHno ANDADoLF Plesr
Color black. Luster pitchy on fresh surfacesand dull on weathered surfaces Streak black with a green tint. Opaque, massive,
S . K a r u p - M l l l e r ( 1 9 7 6 )A r c u b i s i t e a n d m i n e r a l B - t w o n e w m r n fracture subconchoidal Weak plasticity G 4.53(5). Heated
erals from the cryolite deposit at Ivigtut, south Greenland
( 9 0 0 ' C ) m a t e r i a l h a s a p o r k l i v e r c o l o r w i t h s u b m e t a l l i cl u s t e r .
Litho.s, 9, 253-257.
V H N = 4 6 6 . 3 3 - 5 8 3 . 8 0k g / m m ' . C l e a v a g ea b s e n t o n h a n d s p e c i Microprobe analyses of 6 grains gave the following ranges and
m e n s T h i n - s e c t i o n se t c h e dw i t h H N O , s h o w e d o n e s e t o f p e r f e c t
a v e r a g e sA: g 5 9 . l - 6 4 7 , 6 2 l ; C u 4 . 3 - 6 . 8 , 5 . 8 ;B i 1 5 . 7 - 1 7 . 0l,6 7 ; P b
cleavage.
0 . 8 - 3 . 1 ,1 . 4 ;F e 0 4 - 1 . 1 , 0 . 7 ; T e 1 . 5 - 3 . 42, . 2 ; S l l . 5 - 1 3 7 , 1 2 . 3 ;s u m
D T A c u r v e s h o w e d a w e a k e n d o t h e r m i cp e a k a t 5 2 5 " C ( d e h y dration) and a distinct exothermic peak at 825"C (recrys99.4-102.9, l0l 2 percent, corresponding to Ag. o,CuorrBioro
P b o o r F e o , r S n o , T e oo, .r, A g r C u B i S a .X - r a y d a t a c o u l d n o t b e o b t a l l i z a t i o n) .
tained. Reflectance color light gray with a faint olive-brown tint.
I n r e f l e c t e dl i g h t t h e m i n e r a l i s g r a y i s h w h i t e w i t h i n d i s t i n c t
p l e o c h r o i s ma n d r e d d i s h b r o w n ( w i t h a g r e e n t i n t ) i n t e r n a l r e f l e c Reflectanceswere measured in air and in oil at l2 wavelengths. ln.
a i r , R g a n d R p w e r e :4 6 0 n m , 3 3 . 5 , 3 3 . 8 ;5 4 0 , 3 3 . 7 , 3 2 . 1 ; 5 8 0 , 3 3 . 9 , t i o n R e f l e c t a n c e1 2 . 5p e r c e n t( 5 7 2 0 , 4 ) .n : 2 0 2 b e f o r e h e a t i n g ,n (
(>?GYC)2.02 after heating to 900oC
3 1 4 ; 6 6 0 , 3 3 . 4 , 3 0 . 9 p e r c e n t .A n i s o t r o p i c , c o l o r s c r e a m t o b l u i s h
g r e e n .T h e m i n e r a l i s e t c h e d b y F e C L , H g C l , , K C N s o l u t i o n s a n d
T h e m i n e r a l o c c u r s a s g l o b u l a r m a s s e s( u p t o I k g ) i n a q u a r t z
s y e n i t e i n a A r c h a e a n m a r b l e , H u b e i , C h i n a , a s s o c i a t e dw i t h o r by HNO, and HCl, but not by KOH solution.
t h o c l a s e ,a l b i t e , q u a r t z , b i o t i t e , m i c r o c l i n e , h o r n b l e n d e , g a r n e t ,
T h e m i n e r a l o c c u r s i n g a l e n ao r b o r d e r i n g i t i n a n h e d r a l g r a i n s
z i r c o n , i l m e n i t e ,t i t a n o m a g n e t i t e .
of average diameter 0.05 mm, associated with hessite, aikinite,
matildite, and berryite.
Discus.sion
The name is for the components (argentum, cuprum, Bi, S)
T y p e m a t e r i a l i s a t t h e M i n e r a l o g i c a lM u s e u m , U n i v e r s i t y o f C o F e r c h e v k i n i t e( a s i t a p p e a r si n t h e p a p e r ) a n d i r o n c h e v k i n i t e( i n
p e n h a g e n( n o . 1 9 7 3 ,l l 4 ) .
English abstract) are unjustified names given to this iron-rich
Grains of mineral B with diametersless than 0.05 mm gave
v a r i e t y o f c h e v k i n i t e .l t i s a c o m m o n p r a c t i c ei n C h i n a t h a t m i n e r a l
m i c r o p r o b e a n a l y s e sA g 6 8 . 6 , 6 5 . 5 ;C u 2 . 5 , 1 . 5 ; B i 0 . 3 , 1 . 0 ; P b 0 8 ,
varieties are named in the same manner as species The general
1 . 5 ;T e 2 3 . 0 , 2 5 . 4 ;S 5 . 8 , 5 . 2 ; s u m l 0 l . 0 , 1 0 0 .I p e r c e n t ,c o r r e s p o n d f o r m u l a a d o p t e d b y t h e a u t h o r s d e v i a t e sc o n s i d e r a b l y f r o m t h e
i n g t o A g , T e S A n i s o t r o p y d i s t i n c t .M . F .
formula,
Arcubisite,* unnamed mineral B
(Ca,Ce,Thl(Fe,Mg),(Ti,Fe),Si.O,,
Ferchevkinite(iron chevkinite)
generally accepted in the English literature (e.9. Fleischer, 1975
Glossary o.fMineral Specre.i/ A recalculation of the analysis on the
b a s i so f 2 2 o x y g e n a t o m s g i v e s
Zhang Rubai and Fan Liangming (1976) Iron chevkinite in a
quartz syenite from a certain district in Hubei. Geochimica, 4,
244-250 (in Chinese with English abstract).
C h e m i c a l a n a l y s i s g a v e : S i O , 1 7 . 8 8 ,T i O , 1 7 . 7 1 , F e , O , 7 . 0 8 ,
A l z o i 0 . 4 7 , T a , O u0 . , 0 3 1N, b , O , 0 . 2 3 , T R r O s 3 6 . 2 6 ,T h O , 3 . 6 1 ,C a O
2 . 6 6 , F e O 1 0 . 5 0 ,M n O 0 . 0 2 4 , M g O - , U s O s 0 . 4 2 , Z r O , - , K , O 0 0 8 ,
N a , O 0 5 8 , H r O + 2 . 1 9 , H r O * - , s u m 9 9 . 7 2 5 p e r c e n r .T h e r a r e
e a r t h sw e r e :L a 2 6 . 2 , C e 4 6 . 8 ,P r 3 . 2 ,N d 1 5 . 1 ,S m 2 . 8 , E u 0 . I l , G d
16, Tb 2.1, Dy 0.3, Ho-, Er 0.03,Tm-, Yb 0.04, Lu-, Y 1.6
percent. The formula based on
A3B2SirO12is (TR, ..Fefl.+ruTho
o"Cao'IJo o,
Nao ,,Ko orMnooo);=r rn(Ti, nnFe3.*urTao
oo"
Nbo o,)> =, ore(Si,,nAloo.)2=, ooOro,"r(OH
), 0..
The mineral is metamict. The strongest powder lines of heated
( 9 0 0 ' C ) m a t e r i a la r e ( 1 6 g i v e n ) :3 . 1 7 ( 7 ) , 2 . 8 5 ( 5 ) , 2 ' 7 0 ( 1 0 ) , 2 . 1 7
( 8 ) , 1 . 9 6 ( 8 ) . M a t e r i a l s u i t a b l e f o r s i n g l e - c r y s t a lw o r k w a s n o t
available.
* Minerals marked with an asterisk after
the name were approved before publication by the Commission on New Minerals
and Mineral Names of the International Mineraloeical Association.
0003-004x/78/0304-0424$00.50
(TR,
u"Nao,rTho ,7Ko62fJ6e2); =,
",
"oCao
F e ! + * ( T i , , . F e ! j l N b q q 2 )2 = 3r , ( S i e7 s
AIo,r)p:, erOzz(HrO),,r.
G.Y.C.
FerrifaYalite ( = laihunite)
F e r r i f a y a l i t e R e s e a r c hG r o u p , D e p a r t m e n t o f C e o l o g y , P e k i n g
University and Institute of Geology and Mineral Resources,
C h i n e s e A c a d e m y o f G e o l o g i c a l S c i e n c e s( 1 9 7 6 ) , F e r r i f a y a l i t e
a n d i t s c r y s t a l s t r u c t u r e .A c t a G e o l o g i c aS i n i c a , 2 , l 6 l - 1 7 5 ( i n
C h i n e s ew i t h E n g l i s h a b s t r a c t ) .
C h e m i c a l a n a l y s e sg a v e : S i O , 3 1 . 0 0 , 3 1 . 9 4 , 3 1 . 0 7 ,3 1 . 8 5 ; F e r O 3
4 3 . 5 7 , 4 5 . 1 O , 4 4 . 2 4 , 4 5 . 0 7A:l , O , n d , n d , n d , 0 . 0 6 5 ; C r , O , t r a c e ,n d ,
n d , n d ; F e O 2 5 5 0 , 2 2 . 6 2 , 2 3 . 6 4 , 2 25 2 ; M g O n d , 0 . 9 9 ,0 . 8 7 , 0 . 4 7 ;
CaO nd, nd, 0.21, 0.47; sum 100.07, 100.65, 100.03, 100.45.
These correspond to Fe?lrrFei+e8sir
BEO6,Fer'zj"Fe!+ooMgo
ossir8808,
Fel j"Fe!+ooMgo
or ideossir8608, and Fe?lrFel.+rMgo
""Si, ".Or,
a l l y F e ' z * F e ! +( S i O , ) r S p e c t r o g r a p h i ca n a l y s i ss h o w e dt r a c e o f A [ ,
Ba, Ca, Cu, Mn, Yb, and Ti.
424
NEW MINERAL
Weissenberg photographs showed the mineral to be orthorhombic, Pb2rm, Pbm2, or Pbmm, but structure analysis establ i s h e dt h e s p a c eg r o u p P 2 , / b ; a 4 . 8 0 8 ( 2 ) ,b l 0 . l 7 l ( 6 ) , c 5 . 8 2 4 ( 4 ) 4 ,
a 9 0 o . S t r o n g e s tG u i n i e r p o w d e r l i n e s a r e ( 6 5 g i v e n ) : 3 . 4 8 8 ( l 0 B )
(l l r, 120), 2.774 (9) (130), 2.s2t (10) (022, l3l, 040), 2.405 (7)
(20o), 2.246 (7 ) ( I 40, | 22), 2. | 75 (6) (2 | t, 220), t .',t4 s (8) (24o, 222),
| 4 s 6 - t . 4 4 9 ( 6 ) ( 0 0 4 , 3 3 0 2 2 3 ) , 1 . 4 0 7( 6 ) ( 3 3 1 , 3 0 2 ) . T h e l i n e s a r e
relatively diffuse
The structure was solved by Ofrl and ft&O Patterson syntheses,
u s i n g 2 4 6 m u l t i p l e - f i l m v i s u a l i n t e n s i t i e s ,a n d w a s r e f i n e d b y a
method unfamiliar to the abstractor, R(Oki) : 0 23, R(hk}) : 0 21.
T h e s t r u c t u r e i s e s s e n t i a l l yl i k e t h a t o f o l i v i n e w i t h F e ' + i n M ( l \
and Fe'+ in (000) and (0i0) of M(2) but leaving (00|) and (il$) sites
vacant
Color black, luster submetallic,streak blackish brown, nonfluorescent in cathode ray, X-ray, ultraviolet, and infrared. Mine r a l g r a i n s ( 0 2 5 - 0 . 7 m m , u p t o I m m ) a r e a n h e d r a l ,a n d f e w a r e
s u b h e d r a lt a b u l a r V H N = 6 1 7 - 8 3 3 k g / m m " , v a r i e s w i t h o r i e n t a - '
tion, Mohs hardness 5 5-6.5. Moderately magnetic! moderately
electromagnetic. G meas 3.967, calc 4.099. Cleavage { 100}distinct,
{ 0 1 0 1i n d i s t i n c t , a n d t w o a d d i t i o n a l s e t s i n t e r s e c t i n ga t 6 0 ' a n d
n e a r l y p e r p e n d i c u l a rt o ( 1 0 0 ) .
Under reflected light the ririneral is grey with distinct bireflectance, anisotropic, pleochroic from gray to grayish black. Refractive indices calculated from measured refractivities are n(546\ 2.03,
n(589) 2 0l parallel to cleavage and n(546) 2.04, n(589) 2.03 perpendicular to cleavage.
TGA curve shows one exothermic peak at 700'C. Infrared (KBr
pellets) absorption bands are ll20(m, sh:shoulder), 10451 0 2 5 ( m s , s h )9, 8 5 ( s , s h ) 9
, 45 (vs), 870(s,sh)8
, 40 (m,sh), 620(m,sh),
5 7 5 ( m ) , 5 1 0 ( m , s h ) ,4 8 0 ( s ) ,4 6 0 ( s , s h )
T h e m i n e r a l o c c u r s a s a m a j o r c o m p o n e n t ( u p t o l 0 p e r c e n t )i n
a n A n s h a n - t y p e - l i k eS i n i a n ( l a t e P r e c a m b r i a n )m a g n e t i t ed e p o s i t ,
L i t t l e L a i - h e V i l l a g e , L i a o n i n g , C h i n a . T h e a s s o c i a t e dm i n e r a l sa r e
hypersthene, augite, hornblende, magnetite, plagioclase, and
quartz
Dist'u"'sion
T h e m i n e r a l i s i d e n t i c a lt o l a i h u n i t e ( A m M i n e r a l , 6 2 , 1 0 6 5 )t h e
a n a l y s e so f w h i c h a p p e a r e di n t h e p r e s e n tp a p e r a s A n a l y s e s l , 3 ,
and 4. Two referencesto the laihunite papers were made in the
footnotes but without any comments. The correctnessof the struct u r e i s q u e s t i o n a b l ea s t h e S i - O d i s t a n c e s( 1 . 9 0 5 , I 8 4 5 , 1 . 8 6 6 ,
1 . 5 7 0 4 ) a r e f a r o u t s i d e t h e u s u a l r a n g e o f I 6 0 4 - 1 . 6 5 1( B r o w n a n d
Gibbs, 1969)
The name "ferrifayalite" has alreadybeen used by Ginsburg el
al (1962) for a variety of olivine containing FerO, 47.18, FeO
1 2 . 5 3 ,a n d M n O 7 . 5 5 p e r c e n t .T h i s v a r i e t y w a s l a t e r r e f e r r e dt o a s
" F e 3 + - f e r r o o l i v i n e " i n P o v a r e n n y k h( 1 9 7 2 ) .G . Y . C .
References
B r o w n , G . E . a n d G V . G i b b s ( 1 9 6 9 )O x y g e nc o o r d i n a t i o n a n d t h e
Si-O bond, Am Mineral., 54, 1528-1539.
G i n s b u r g , I . W . a n d o t h e r s( 1 9 6 2 ) T r u d y M i n e r a l M u z e y a , 1 3 , 2 8 .
Povarennykh, A. S. (1972) Crystal Chemical Classifcation of Minaral.r Plenum, New York-London.
Furongite
Hunan 230 Laboratory, Hunan 305 Geological Team and
X-ray Laboratory, Wuhan Geological Institute (1976),Furon-
0003-004x/'78/ 0304-04
25s00.50
NAMES
425
gite-a new uranium mineral found in China. Acla Geol. Sin.,
2. 203-204 (in Chinese).
C h e m i c a l a n a l y s i sg a v e : U O ' 4 1 . 4 0 ,P 2 O u1 8 . 5 4 ,S i O , 0 . 8 0 ,A l r o s
1 3 . 6 7 ,F e z O r 0 . 6 1 , B a O 0 . 5 9 , C a O 0 . 0 9 4 , M g O 0 . 0 1 5 , K , O 0 . 1 1 ,
HzO+ 14.54, HrO 9.36, sum 99.'129percent, corresponding app r o x i m a t e l y t o A l u ( U O r ) ' ( P O . ) ' s ( O H ) 1 n . 5 8 H , Ow i t h Z = l , o r
simply AI,(UO,XPO.),(OH),.8H,O (with Z : 7, GYC).
Single-crystal studies showed the mineral to be triclinic, Pl or
P 7 . a 1 7 . 8 7 ,b 1 4 . 1 8 ,c l 2 . l 8 A , a 6 7 . 8 , 0 7 7 . 5 , 1 7 9 . 9 " . O n l y l l
s t r o n g e s tp o w d e r l i n e s a r e r e p o r t e d : 1 0 . 2 ( 1 0 0 ) , 8 . 6 2 ( 8 0 ) , 5 . 5 5 3
( 3 0 ) , 5 . 0 e 6( 3 0 ) , 4 . 3 1 0( 5 0 ) , 3 . 6 3 e( 4 0 ) , 3 . 5 1 7( 3 0 ) , 3 . 4 4 8( 2 s ) , 3 . 2 6 4
( 3 0 ) , 2 8 6 8 ( 3 s ) , 2 . 8 1 7( 3 0 ) .
Color bright yellow to lemon yellow, translucent with vitreous
luster. Brittle, radioactive, strong pale yellowish-greenfl uorescence
i n u l t r a - v i o l e t l i g h t . G m e a s 2 . 8 2 - 2 . 9 0 ,c a l c 2 . 8 4 8 . U n d e r t h e m i croscope the mineral is pale yellow, pleochroic. One set of very
perfect and two sets of perfect cleavage.Oblique extinction with
, V = 6 5 " , a 1 . 5 4 3 - 1 . 5 4 9B,
s m a f le x t i n c t i o n a n g l e .B i a x i a l n e g a t i v e 2
| 5 6 4 - t 5 6 7 .t 1 . 5 7 0 - 1 . 5 7 5 .
The DTA curve shows one large endothermicpeak at l70oC.
The TGA curve shows that weight loss begins at 38'C, reaches
m a x i m u m r a t e a t 1 5 0 - 2 5 0 o C .T h e D T G c u r v e s h o w s a l a r g e p e a k
at 170'C.
The mineral was found in the oxidation zone of an illuvial-type
u r a n i u m d e p o s i t i n a L o w e r C a m b r i a n c a r b o n a c e o u ss h a l e ,w e s t e r n H u n a n , C h i n a . T h e m i n e r a l o c c u r s a s t a b u l a r c r y s t a l sa n d a s
dense cryptocrystalline aggregates,associatedwith utahlite (varisc i t e ) , e v a n s i t e ,o p a l , h a l l o y s i t e ,l i m o n i t e , a n d a u t u n i t e .T h e n a m e i s
derived from a poetic description of the Hunan province. Detailed
descriptions of the mineral are in preparation. G.Y'C'
Hatrurite, nagelschmidtite, unnamed calcium minerals
S h u l a m i t G r o s s ( 1 9 7 7 )T h e m i n e r a l o g yo f t h e H a t r u r i m f o r m a t i o n ,
lsrael Geol Suruey Israel Bull., 70,80 p.
The Hatrurim Formation ("Mottled Zone"), outcropping at 9
l o c a l i t i e s ,c o n t a i n sa c o m p l e x a s s e m b l a g ei ,n s e d i m e n t a r yr o c k s , o f
fine-grained minerals characteristic of high-temperature contact
m e t a m o r p h i c a s s e m b l a g e s( r a n k i n i t e , s p u r r i t e , l a r n i t e , b r e d i g i t e ,
e r r ' ) . T h e s e a r e d e s c r i b e d ,w i t h m a n y p h o t o m i c r o g r a p h sa n d S E M
photographs, and electron microprobe analyses. The following
n e w m i n e r a l sa r e d e s c r i b e d :
I Hatrurite (for the locality), CaeO(SiO.). Microprobe analysis
b y G S o c r o u n u s i n g w o l l a s t o n i t ea s s t a n d a r dg a v e S i O r 2 6 . l , C a O
72.8, Al,O3 0.4, TiO,0.3, FezOs0.2, MgO traces, sum 99.8 percent.
The mineral is rapidly decomposed by water. It occurs as pseudohexagonal crystals about 50 microns in diameter in larnite-brownmillerite-mayenite rock. The strongest X-ray lines are overlapped
by those of larnite; the only lines that could be distinguished were
3 . 0 3( m ) , 2 . 9 6( v w ) , 1 . 7 6 7( m w ) , 1 . 7 5 9( v w ) , 1 . 4 8 4( v w ) , 1 . 4 5 2( v w ) .
The mineral is colorless.Optically biaxial, neg., 2V small, birefringence about 0.006.
S y n t h e t i c C a . S i O ui s w e l l - k n o w n a s o n e o f t h e m o s t i m p o r t a n t
constituents of portland cement ("alite"). "Pure CasSiO' is triclinic, but small amounts of foreign ions in solid solution cause it
t o b e c o m em o n o c l i n i c o r t r i g o n a l . "
2. Nagelschmidtite; Cag(POlz'2 a-CazSiO, [or more generally,
Ca, n(Si,P)rOr, variable solid solution]. The name was long ago
applied to synthetic material, and is now applied to the first natural
occurrence It occurs as anhedral grains up to 150 microns, associated with gehlenite, rankinite, perovskite, titanian andradite, and
426
NEW MINERAL
magnetite.ProbeanalysisgaveSiO, 27.88,P,OE8.27,CaO 27.88,
AlrO30.03,Fe,Or0.02,Cr,O,0 03,MgO 0.05,SO30.12,MgO 0.03,
KrO 0.84, NarO 0.82, sum 100.15percent,corresponding
to
(Ca,,rNaoouKo
In thin sectionshowsa complexset
o6XSi1
6sPo
4o)Os.
of lamellaeintersecting
at anglescloseto 60o. Usuallyuniaxial
positive,rarely biaxial positive with 2V nearlyzero. Two phases
weredistinguished:
(a) colorless,
phasewith a 1.680,
transparent
"y
1.698,main X-ray lines2.66(vs),2.80(s), 1.94(m); (b) a cloudy
phase,slightlyyellowor brownandturbid,a 1.638,7| 652.X-ray
s t u d y[ 3 . 4 5( m ) , 2 . 8 3( v s ) , 2 . 7(6m ) , 1 . 9 4( m ) , 1 . 8 4( m ,d i f f . ) ]s h o w s
it to be a mixtureof polymorphs,
a- and B-modifications.
Syntheticnagelschmidtite
was reportedto be opticallybiaxial,
positive,2V 0-20",a 1.642-1.680,
5, "y 1.66I - 1.690,
G
P 1.642-1.67
3.065,cleavages{001} good, {ll0} fair lAm. Mineral., 27, 680
(re42)1.
3. Unnamed CaAlnot This mineral was found as an accessory
m i n e r a l i n l a r n i t e r o c k , a s s o c i a t e dw i t h b r o w n m i l l e r i t e a n d m a y enite. It occurs as laths or rounded grains up to 30 microns across.
X - r a y l i n e s n o t o v e r l a p p e db y a s s o c i a t e dm i n e r a l s a r e4 . 4 4( s ) , 3 . 5 9
( v w ) , 3 . 4 9 ( v v s ) , 3 3 7 ( v v w ) , 3 . 0 8( m ) , 2 . 5 3 ( v w ) . T h e m i n e r a lh a s
p a r a l l e l e x t i n c t i o n , l o w b i r e f r i n g e n c e ,b i a x i a l , p o s i t i v e , 2 V s m a l l .
Goldsmith lAm. Mineral..34.479 (1949)l gives for the syntheric
c o m p o u n d m o n o c l i n i c , n e a r l y u n i a x i a l , w i t h n 1 . 6 1 7 ,1 . 6 5 1 .
4. Unnamed Cay4l"O" nH2O.The mineral was identified on the
basisof its X-ray pattern (not given). A grain in spurrite-maye n i t e - b r o w n m i l l e r i t er o c k g a v e o n p r o b e a n a l y s i sA l r O , 4 l 9 , C a O
45.7, Fe and Ti traces, HrO (diff.) 12.4, corresponding to
C a , A l , O , . l . 8 H r O ( d e h y d r a t i o ni n t h e e l e c t r o nb e a m i s p o s s i b l e ) .
Microscopic hexagonal plates about 4 microns acrossgave a longe s t X - r a y s p a c i n go f 1 0 . 7 A , c o r r e s p o n d i n gt o t h e 8 - h y d r a t eo f t h i s
well-known synthetic compound. The DTA curve shows endot h e r m i c b r e a k s a t 1 4 2 o , 2 7 8 o ,a n d 6 9 0 o . a n d a n e x o t h e r m i cb r e a k
at 355'.
5. UnnamedCa*4l"Or.nH"O. This was identified by the main Xr a y s p a c i n g s8 . 1 ( v s ) , 3 . 9 5 ( m ) , a n d 2 . 8 8 ( s ) , c o r r e s p o n d i n gt o t h e
l 3 - h y d r a t e . I t o c c u r s w i t h n o . 3 a b o v e , c a l c i t e ,v a t e r i t e ,a r a g o n i t e ,
e t t r i n g i t e ,a n d p o r t l a n d i t e . T h e D T A c u r v e s h o w s a n e n d o t h e r m i c
e f f e c t a t 1 4 0 - 1 9 0 ' . T h e m i n e r a l o c c u r s i n t h i n h e x a g o n a lp l a t e s .
6. Unnamed Ca(Al,Fe)rO^ nHrO. This occurs as a brown isot r o p i c p h a s e r e p l a c i n g b r o w n m i l l e r i t e . P r o b e a n a l y s e sb y F . H o f oye and G. Socroun gave FerO337.7, 36.0: AIrOs I I .9, 19.2; Cr"Os
1 . 0 ,0 . 7 ; T i O z 3 . 5 , 4 2 ; C a O 9 . 7 , 1 0 . 4 ,M g O n . d . , 1 . 9 ;S i O , ( v a r i a b l e )
3.2:5.8, 0.6-3.0, sum 67 0-69.6; 13.0-15.4 percenr. These give
the formulas Ca(Fe, s"AlorrTio r0)O{. I I 5HrO, and (Cao
z)
(Feor.Alo roTio,r)O1 [ 1.5 HrO, and (CaorMgo ,)(FeoruAlo "Mgo,r)
"oTio
O n 5 T H r O W a t e r i s p r o b a b l y l o s t u n d e r t h e e l e c t r o nb e a m . T h e
DTA curve shows a large endothermic break below 200.. The
phase is amorphous to X-rays
7 . U n n a m e dC a l l " O u . 3 C a C O B . 3 2 H 2 0 T f e m i n e r a l o c c u r s a s
t h i n f i l m s i n v e i n s c u t t i n g c a l c - s i l i c a t e - h y d r a t er o c k s a n d o v e r g r o w i n g e t t r i n g i t ec r y s t a l si n o p t i c a l c o n t i n u i t y . I t i s u n i a x i a l n e g a tive, ot 1.476, e 1.456; synthetic material with 29 HrO had <o1.48,
e 1.456. The X-ray pattern is characterized by an intense line at
9.4A, but most lines are overlapped by those of ettringite so that
further confirmation is required.
8. Unnamed a-Ca"( HSiO,)(OH) (or CarSiOn.HrO, dimorph of
h i l l e b r a n d i t e ) .T h i s c o m p o u n d , w e l l - k n o w n a s a s y n t h e t i c c o m pound, is reported as a mineral for the first time: it occurs as a
c a v i t y - f i l l i n gi n m e l i l i t e - l a r n i t e r o c k s , s u r r o u n d e d b y t o b e r m o r i t e
and jennite. Crystalsare orthorhombic, prismatic, twinned. The
s t r o n g e s tX - r a y l i n e s a r e 4 . 2 2 ( v s ) , 3 . 9 0 ( s ) ,3 . 2 7( v s ) . . . M i c r o p r o b e
analysis confirms the ratio CaOlSiO, to be 2.,' DTA shows an
0003-004x/ 78/ 0304-0426$00.
50
NAMES
endothermic effect at 470-480", an exothermic one at 880-900o
T h e m i n e r a l i s b i a x i a l , p o s i t i v e , b i r e f r i n g e n c e0 . 0 0 7 M . F .
lsoplatinocopper
Hong Shi (1976) Discovery of isoplatinocopper-a new mineral
and its nomenclature. Geochimica,4, 240-243 (in Chinese with
Englishabstract).
M i c r o p r o b e a n a l y s e sg a v e : P t ' 73 . 2 , 7 3 . 8 , 7 1 . 5 , 6 9 . 1 ,72 , 6 8 . 5 , ' 72 ,
7 3 ; C u 3 0 . 6 , 3 0 . 5 , 2 9 . 7 , 2 8 . 5 ,3 t , 3 0 6 , 3 1 , 2 9 ; s u m 1 0 3 . 2 ,1 0 4 . 3 ,
l0l 2, 98 4, 103, 99.1, 103, 102 percent. These correspond to
PtrCu, ,r, Pt.Cu, or, PtrCuu ,u, PtrCu6, Pt.Cuo4r, PtrCuu48,PtrCus28,
PtnCu,on.
The mineral is cubic, Fm3m, a 3.786A. The X-ray diffraction
l i n e s a r e : 2 . 1 8 5( 1 0 ) ( l I l ) , 1 . 8 9 5( 8 ) ( 2 0 0 ) , 1 . 3 3 7( 7 ) ( 2 2 0 ) , | 1 4 2 ( 8 )
(3ll), 1.092(6) (222). The mineral is white with a yellow tint
L u s t e r m e t a l l i c ; n o n - m a g n e t i c ;s l i g h t l y d u c t i l e G r a i n s i z e i n g e n eral is 0 05-0 lmm, the largest may reach l.Omm. In reflected light
the mineral is white with a yellow tint, isotropic. Reflectancesare:
5200 58, 5800 61, 64004 61.5 percent.VHN(5g load) 170 (1272 0 0 ) k g / m m " M o h s ' h a r d n e s s3 . 5 . G m e a s 1 4 5 , c a l c ( P t n C u u , o )
1 4 . 7 9 .Z : 4 .
The mineral occurs as hemispherical aggregatesin a pyroxenitepyroxeneamphibolite (?) intrusivein the Yenshanregion,China.
Other platinum-group minerals are mainly cooperite,sperrylite,
and mertieite with lesser amounts of polyxene, moncheite, merenskyite, and stibiopalladinite. The platinum-group minerals are
d i s s e m i n a t e di n t h e i n t e r s t i c e so f r o c k - f o r m i n g m i n e r a l sa n d i n t h e
c h l o r i t e v e i n s ,a s s o c i a t e dw i t h d i o p s i d e ,c h l o r i t e , a n d a p a t i t e .
Discussion
The cell contents, calculated from the analyses, volume, and
d e n s i t y ,r a n g e f r o m 3 . 8 2 t o 4 . 0 7 t o t a l C u a n d P t a t o m s .W i t h Z = 4 ,
t h e n o r m a l i z e df o r m u l a o f t h e m i n e r a l m u s t b e P t oo , o . . C u o* o r r .
The Cu-Pt phase diagram has a continuous f.c c solid solution at
efevated temperatures IHansen and Anderko, Constitution of
Binary Alloys (1958)1.The cell edge of the mineral confirms that a
simp.lelinear relationship exists between Cu and Pt. Therefore the
mineral is platinian copper and does not justify a speciesname.
L.J.C.. G.Y.C.
Janggunite*
S o o n J i n K i m ( 1 9 7 6 )J a n g g u n i t e ,a n e w m i n e r a l f r o m t h e J a n g g u n
mine, Bonghwa, Korea. J Korean lnst Min. Geol., 8, ll7-125
(Korean with English summary).
A n a l y s i s g a v e M n O , 7 4 . 9 1 ,M n O I 1 . 3 3 , F e r O . ( t o t a l i r o n ) 4 . 1 9 ,
PbO 0.03, HzO+ 9.46, sum 99.92 percent. Traces of K, Ca, Ba, Mg,
Cu, Zn, and Al were found. The analysis corresponds to Mno'+"u
(Mn3*.* Fe!+ro)Oo
, e( O H L . r , o r M n r 4 1 , ( M n , F e 3 + ) r r , O ( O H ) ux, 0 2 Infrared study showed the presence of (OH). A DTA curve
shows endothermic peaks at 25O-37O" [formation of cubic
( M n , F e ) r O s ,a 9 . 4 7 l A l a n d a t 9 5 5 " ( f o r m a t i o n o f h a u s m a n n i t e ) .
X-ray powder data are indexed on an orthorhombic cell with a
9 . 3 2 4 , b 1 4 . 0 5 ,c 7 . 9 5 6 A , Z : 4 , G 3 . 5 7 c a l c , 3 . 5 9 m e a s . T h e
s t r o n g e s tl i n e s ( 1 7 g i v e n ) a r e 9 . 3 4 ( s ) ( 1 0 0 ) , 7 . 0 9 ( s ) ( 0 2 0 ) , a . 6 2
( m ) ( 2 0 0 , 1 2 14). ,r 7( m ) ( 1 3 0 )3, . s 4 7( s ) ( l l 2 ) , 3 . 1 0 1( s ) ( 3 0 0 ) ,
( m )( 3 3 1 ) .
2.469
The mineral is black with dull luster, streak brownish-black to
dark brown. H 2-3. Opaque. Reflectance 13-15 percent Birefringence distinct.
NEI4/ MINERAL NAMES
The mineral occurs as radiating groups of flakes, colloform
b a n d s , a n d d e n d r i t i c o r a r b o r e s c e n tm a s s e si n t h e z o n e o f s u p e r gene Mn oxides, associated with calcite, nsutite, and todorokite
The name is for the mine M.F.
(l) 38.3-394
. 20,. 63, 9 . 04; l . l - 3 8 . 34; 0 7 , 3 8 . 2 ;
(2) 37.3,4',1
43.6:
.8,45.8,
( 3 ) 3 34 , 3 4 . 33,1.1 ,3 0 . 4 ;
( 4 ) - , 3 35 , 3 43 , 2 9 . 5M
. .F.
Parapectolite, "paraserandite"
New Data
W. F. Miiller (1976) On stacking disorder and polytypism in
pectolite and serandite. Z. Kristallogr , 144,401-408
Mawsonite-(Ge) ( :germanium mawsonite)
"Feuermineral" :germanian mawsonite
Electron diffraction patterns showed one pectolite sample from
Rauschermiihle, Germany, that gave a pattern like that of "parawollastonite." The name parapectolite is suggested. It is stated
'paraserandite'
"No
was found."
Joachim Ottemann, Bernhard Nuber, and B. H. Geier (1977) A
germanium and zinc-bearing variety of mawsonite from the
Tsumeb deposit. Chem Erde, 36, ll0-117.
Discussion
The IMA Commission recommendedin 1962 that the name
parawollastonite be dropped. Obviously names like "paraserandite" for a compound not yet found should not be given.
Parapectolite should be called pectolite-M2abc lsee Am Mineral ,
M i c r o p r o b e a n a l y s e sg a v e C u 4 0 . 9 ,4 3 2 , 4 2 . 8 ; F e 8 7 , 9 5 , 1 3 . 6 ;
2n3.7,2.1
, 0 . 7 ;S n 1 2 . 0 , 7 . 4 , 2 . 6 : G e 2 . 94 ,, 33 . 4 ;A s 0 . 7 , 2 6 , 34 ; S
. -ray datacorre3 2 . 3 , 3 32 , 3 3 . 6 ;s u m 1 0 1 . 2 ,1 0 1 . 4 ,1 0 0 . 1p e r c e n t X
s p o n d t o t h o s e o f t h e s t r o n g e s tl i n e s o f m a w s o n i t e ;t h e m i n e r a l i s
c u b i c o r p s e u d o - c u b i cw i t h a : 1 0 . 7 1 0+ 0 . 0 0 5 4 I t w a s p r e v i o u s l y
d e s c r i b e da s " F e u e r m i n e r a l " ( A m M i n e r a l , 5 J , l 8 l 2 ) . M . F .
6 2 ,4 r 4 t s ( 1 9 7 7 )M1..F .
Triclinic roscherite
L. Fanfani, P F. Zanuzzi and Anna Rosa Zanzari (1977) The
Unnamed PbaCu.Bi,oS2,,PbrCuTBi"Srn,PbCuBirS,r, Ag3CurBirSu
crystal structure of a triclinic roscherite. Tschermaks Mineral.
B. G. Kolkovski and Yu.S. Borodaev (1974) Bismuth sulfosalts
Petrogr Miu , 24, 169-178
from the Vurli Bryag copper deposit, Burgas. Minerogenezis
The crystallography of roscherite is more complicated than pre(Bulg. Acad. Sci.) 419-436 (Bulgarian with English summary).
v i o u s l y t h o u g h t . S i n g l e - c r y s t aXl - r a y w o r k o n m a t e r i a l f r o m F o o t e
Microprobe analysesare given of4 minerals found in chalcopyMine (North Carolina) gave triclinic symmetry. The unit cell correrite-hematite-quartz ores No X-ray data are given.
s p o n d i n g t o t h e o n e a d o p t e d f o r m o n o c l i n i c r o s c h e r i t eh a s a =
( l ) A n a l y s e so f 3 g r a i n sg a v eC u 1 0 . 5 ,1 0 4 , 1 0 . 3 ;P b 3 2 . 4 , 3 2 . 2 , 1 5 . 9 2 1b.:
1 1 . 9 6 5c. : 6 . 7 4 1A , a : 9 l ' 0 4 ' , 0 : 9 4 ' 2 t ' , ' y =
3 2 . 0 :B i 4 2 l , 4 3 2 , 4 4 . 0 ; S 1 6 . 6 ,1 6 . 6 ,1 6 . 7 ;s u m 1 0 1 . 6 ,1 0 2 . 4 ,1 0 3 . 0 8 9 " 5 9 L , ,s p a c e g r o u p C l . T h e X - r a y s t u d y i n d i c a t e s t h e f o r m u l a
percent, corresponding respectively to Pb"Cu,12Bisoss24
( M e|f,Z, n)Z,C a,M e?+B en(PO n)u'6 HrO, whi le that pro posed for
16, Pb?
Cur.rBi"
m onoclrnicroscheriteis ( Mei) sfl,, r)"Ca"M ef;+Be.(POl )6(O H )6 4H,O
r o , P b r C u , s r B i "u 2 S 2 3 . " .
"rSro
( 2 ) A n a l y s i s g a v e C u 7 . 1 , P b 2 1 . 2 , B i 3 1 . 4 , S 1 7 . 3 ,s u m 9 7 . 0
The atomic arrangements of both varieties of roscherite are very
percent, corresponding to PbnCurs6Bie60521
similar The lowering of symmetry is caused by the segregation of
08.
(3) Analysis gave Cu 3 9, Pb 9.6, Bi 67.8, S 18.5, sum 99.8
t h e t r i v a l e n t c a t i o n si n t o o n l y h a l f o f t h e s i t e so f a m o n o c l i n i c p o i n t
p e r c e n t ,c o r r e s p o n d i n gt o P b C u , 3 o B io64 s r o2 e .
position Crystallochemical considerations suggest that the sym( 4 ) A n a l y s i sg a v e A g 2 8 . 8 ,C u 1 8 . 4 ,B i 3 8 . 6 ,S 1 6 . 7 ,s u m 1 0 25
m e t r y o f r o s c h e r i t ed o e s n o t d e p e n do n t h e k i n d o f t r i v a l e n t c a t i o n s
p e r c e n t ,c o r r e s p o n d i n gt o A g ,
o c c u p y i n g t h e 6 - c o o r d i n a t e dp o s i t i o n , b u t r a t h e r b y t h e r a t i o b e 0 2 .T h i s m i n e r a l o c c u r s
""Cu",rBirs6
r i m m i n g e m p l e c t i t e .C o l o r g r a y i s h - w h i t ew i t h p u r p l e . R e f l e c t a n c e s t w e e n t r i v a l e n t a n d d i v a l e n t m e t a l i o n s . ( s l i g h t l y m o d i f i e d a u t h o r s '
at 470. 555. 593. and 664 nm are:
a b s t r a c t )A . P .
0003-004x
50
/7I /0304-0427$00