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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 Cu6.2Sn0.97W0.95S7.83, 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 Rvalues of the final Rietveld refinement were Rp= 9.06%, Rwp= 8.31%, RB= 3.16 and RF= 2.17%. Kiddcreekite has a cubic structure, space group F43mand lattice parameter a= 10.8178(3) Å (Z= 4, V= 1265.95(6) Å3). In the unit cell, W, Sn and Cu atoms occupy the 4a, 4cand 24fWyckoff positions, respectively, and S atoms occupy two sets of 16eWyckoff positions. The structure of kiddcreekite consists of stacked double MeS4layers (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. [ABSTRACT FROM AUTHOR]