Richelsdorfite from the Teine mine, Hokkaido, Japan

Abstract

Richelsdorfite was found from the Teine mine, Hokkaido, Japan. It occurs as very minute spherical aggregates of approximately 0.1 mm in diameter on druse of quartz vein. EDS analyses leads the empirical formula, Ca_1.97Cu_5.01Sb_1.03 (AsO₄)₄Cl_0.86 on the basis of As = 4 in anhydrous part. Richelsdorfite formed with the decomposition from luzonite, enargite and tetrahedrite in quartz vein.