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M. Buerger (1961)
A handbook of lattice spacings and structures of metals and alloys.Zeitschrift Fur Kristallographie, 115
Anhedral or subhedral-granular changchengite (grey) disseminated in iridisite
Zuxiang Zuxiang (1995a)
Gaotaiite—a new iridium tellurideActa Min. Sinica, 15
Characteristic X-ray pattern of photograph 5
(1981)
Mineralogy, Geology and Recovery of Platinum Group Elements
Mayingite-a new iridium bismuthide-telluride
F. Hulliger (1963)
New Compounds with Cobaltite StructureNature, 198
Reaction rim of changchengite (greyish white)
(1994)
Shuangfengite - a new iridium bitelluride
Veinlet of changchengite (greyish.white) injected into iridsite
P. Berry, J. Holgate, I. Lockhart (1962)
Pharmacologically Active Extracts from Oak GallNature, 196
Changchengite occurs in chromite orebodies in dunite and in platinum placer deposits in chromite orebodies nearby. The mineral occurs as massive aggregates or veinlets on margins of iridisite (IrS2) and replaces it. Opaque. Lustre metallic. Colour steel–black. Streak black. Hm = 3.7. VHN20= 165 kg/mm2. Isotropic. Cleavage none. Density 11.96 g/cm3. Seven electron microprobe analyses give the following mean chemical results (wt. %): S 7.2, Cu 0.3, Te 0.4, Ir 41.2, Pt 2.8 and Bi 47.3 with total 99.1. The simplified formula is IrBiS. The strongest X–ray powder diffraction lines (hkl, d, f) are 210, 2.75 (70); 211, 2.51 (60); 311, 1.860 (100); 440, 1.090 (50) and 600, 1.027 (50). The X–ray powder diffraction pattern is similar to that of mayingite. After the diffraction data are indexed the mineral is determined to be cubic. The space group is P 213 with a = 0.6164(4) nm, V = 0.2342 nm3 and Z = 4.
Acta Geologica Sinica (English Edition) – Wiley
Published: Dec 1, 1997
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