鹿児島県春日鉱山産zinckeniteについて

抄録

Zinckenite from the Mitsuishi deposit of the Kasuga mine, Kagoshima Prefecture, Japan occurs as acicular crystal or its radial aggregate in durse of a gold-bearing silicified rock, in association with barite, pyrite, stibioluzonite and sometimes tennantite and enargite. Average value of five microprobe analyses is : Pb 3.7, Sb 44.8, As 0.4, S 22.9, Total 99.8 wt%, corresponding to Pb_9.00 (Sb_21.65 As_0.31)_21.96 S_42.02, in conformity with the formula Pb₉Sb₂₂S₄₂, which was obtain from the results of synthetic experiment by Sugaki et al. (1973) or as maximum occupancy of tunnel sites by Sb and Pb metals by Smith (1986). X-ray powder pattern obtained by Guinier camera is indexed on a hexagonal cell with a=22.126 and c=4.318Â.