Iwateite, Na2BaMn(PO4)(2), a new mineral from the Tanohata mine, Iwate Prefecture, Japan

作者：Nishio Hamane Daisuke^*; Minakawa Tetsuo; Okada Hanako

来源：Journal of Mineralogical and Petrological Sciences, 2014, 109(1): 34-37.

DOI：10.2465/jmps.131020a

• Iwateite
• Na2BaMn(PO4)(2)
• Glaserite structure
• Tanohata mine
• Iwate Prefecture

Iwateite, Na2BaMn(PO4)(2) is a new mineral, which was found in the manganese ore of the No. 3 (Matsumaezawa) deposit in the Tanohata mine, Tanohata Village, Iwate Prefecture, Japan. Iwateite has a glaserite structure, which occurs as granular to anhedral inclusions of 10-100 mu m in the main constituent minerals in manganese ore and serandite crystal. It is colorless with white streaks, non-fluorescent, and it displays very weak pleochroism. Iwateite crystallizes in the trigonal system and belongs to the P (3) over bar space group where, a = 5.3642(10), c = 7.039(2) angstrom, V = 175.41(8) angstrom(3), and Z = 1, with a calculated density of 4.06 g/cm(3).

• 出版日期2014-2