福井縣中龍鑛山仙翁谷坑産水亞鉛土(hydrozincite)について

概要

論文の詳細を見る
Hydrozincite, as a white powder crusting brown-coloured drusy hemimorphite, has been analyzed., The Sample was obtained from the Nakatatsu Mine, Fukui Prefecture, one of the famous zinc-lead mines in Japan., It consists, under the microscope, of minute fibrous crystals, lining perpendicular to the surface of the crust., The optical properties are : straight extinction, elongation positive, possibly biaxial negative, with α=1.,649, γ=1.,704, Sp., gr., 3.,59 (26℃)., The result of the chemical analysis follows : ZnO 66.,70%, CaO 2.,69, Al_2O_3 1.,17, Fe_2O_3 tr., CO_2 16.,26 Insol., 0.,26, H_2O (+) 11.,75, H_2O(-) 1.,55, Total 100.,38., These may be expressed by the formula Zn_5(CO_3)_2(OH)_6・H_2O., An X-ray powder photograph taken with Cu K_α compares favorably with that of hydrozincite from Deming, New Mexico.,
日本地質学会の論文
1949-04-20