Study on the Crystal of Daomanite
It was not possible to carry out a complete analyses of crystal, as the experiment by Ding and Shi et al. It's analysis precision R=0.25 or more big than this, which value are not satisfied for single crystal study, but we through many test and found the best: [R(int)=14.5%]. The final full‐matix least‐squares refinement on F 2 converged to R 1=0.0791 and wR 2=0.1864 for 704 observed reflections [I3 2s(I)]. Daomanite is orthorhombic system, space group Cmc21 a=3.7520(8))Å, b=15.844 (4) Å, c=5.8516(12) Å, α=β=γ=90°. V=347.86(14)Å3, Z=4. Daomanite chemical formula is CuPtAsS2. Idealized composition Me+M2+M2+S2=CuS·PtAsS. There is no other similar mineral in the world.
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