Bull. Minéral. (1981), 104, 396-399.
Pumpellyite-(Mn2 + ) from the Ochiai Mine, Yamanashi Prefecture, Japan
by Akira KATO (*), Satoshi MATSUBARA (*) and Ryoichi YAMAMOTO (**),
(*) Department of Geology, National Science Museum 3-23-1 Hyakunin-cho, Shinjuku, Tokyo 160, Japan.
(**) 5-24-13, Nishigotanda, Shinagawa, Tokyo 141, Japan.
Sur la pumpellyite-(Mn2 + ) de la mine de Ochiai, Préfecture de Yamanashi, Japon.
Introduction
Despite the wider compositional variation range of pumpellyite-julgoldite series minerals due to extensi¬ ve substitution in their octahedral cations including Al, Mg, Fe2+ and Fe3+, no member containing Mn2+ as the most dominant octahedral divalent cation has been known to date. The present description is for the preliminary report on the Mn2 +
dominant pumpellyite from a bedded 'manganese ore deposit of the Ochiai mine, Kohsai-cho, Nakakoma-gun, Yamanashi Prefecture, Japan. The mineral is named as pumpellyite -(Mn2+) after the nomenclature system of Passaglia and Gottardi (1973) and the mineral and name have been approved by the Commission on New Minerals and Mineral Names, I.M.A.
The authors express their heartiest thanks to
