In:
Mineralogical Magazine, Mineralogical Society, Vol. 78, No. 7 ( 2014-12), p. 1517-1525
Abstract:
Abundant kiddcreekite grains were identified in the Zijinshan Cu-Au epithermal deposit in Fujian Province, China. The mineral occurs as polycrystalline grains, 5–300 μm in size, associated with colusite, enargite, stannoidite, mawsonite, vinciennite, hemusite, tennantite and wolframite in a predominantly covellite ore. Based on electron microprobe analysis, the empirical formula of the kiddcreekite is Cu 6.2 Sn 0.97 W 0.95 S 7.83 , without significant Se or Te contents. The crystal structure of kiddcreekite was solved using the direct-space method ( EPCryst ) from laboratory micro X-ray diffraction (μXRD) data and refined by the Rietveld method. The R values of the final Rietveld refinement were R p = 9.06%, R wp = 8.31%, R B = 3.16 and R F = 2.17%. Kiddcreekite has a cubic structure, space group F 3 m and lattice parameter a = 10.8178(3) Å ( Z = 4, V = 1265.95(6) Å 3 ). In the unit cell, W, Sn and Cu atoms occupy the 4 a , 4 c and 24 f Wyckoff positions, respectively, and S atoms occupy two sets of 16 e Wyckoff positions. The structure of kiddcreekite consists of stacked double MeS 4 layers (giving a W–Sn–Cu tier and a Cu–vacancy tier) as in the sphalerite substructure. This study also demonstrates the possibility of using laboratory µXRD data coupled with the direct-space method to solve inorganic structures in cases where samples are too small for conventional powder and single-crystal diffraction.
Type of Medium:
Online Resource
ISSN:
0026-461X
,
1471-8022
DOI:
10.1180/minmag.2014.078.7.01
Language:
English
Publisher:
Mineralogical Society
Publication Date:
2014
detail.hit.zdb_id:
2034522-7
SSG:
13
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