R1: Characterization and description of minerals (Joint Session with The Gemmological Society of Japan)

[R1P-10] Aluminosugilite, cerchiaraite-(Mn), and ferri-leakeite from the Funakozawa mine, Iwate Prefecture, Japan

*Daisuke Nishio-Hamane¹, Suzuki Yasumitsu, Ohki Yoshiya, Takashi Ishibashi, Norimasa Shimobayashi² (1. ISSP, Univ. of Tokyo, 2. Kyoto Univ.)

Keywords:aluminosugilite, cerchiaraite-(Mn), ferri-leakeite, Funakozawa mine

We found aluminosugilite, cerchiaraite-(Mn), and ferri-leakeite from the Funakozawa mine, Iwate Prefecture, Japan. Aluminosugilite occurs in quartz layer in slate and is a light purple to pink foliated crystal, cerchiaraite-(Mn) occurs as a vein in braunite ore and is dark green foliated crystal, and ferri-leakeite occurs as one of the main constituents in slate and is the reddish purple fine needle-like crystals. Chemical composition and unit cell parameters are reported for three minerals.