Vimsite from the Fuka mine, Okayama Prefecture, Japan

被引：2

作者：

Kobayashi, Shoichi ^{[1
]}

Yuasa, Manami ^{[1
]}

Tanabe, Mitsuo ^{[2
]}

Kishi, Shigetomo ^{[3
]}

Kusachi, Isao ^{[4
]}

机构：

[1] Okayama Univ Sci, Dept Earth Sci, Fac Sci, Okayama 7000005, Japan

[2] 2058-3 Niimi, Okayama 7180011, Japan

[3] 534 Takayama, Kagamino, Okayama 7080345, Japan

[4] 509-6 Shiraishi,Kita Ku, Okayama 7010143, Japan

来源：

JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES | 2019年 / 114卷 / 05期

关键词：

Vimsite; Calcium metaborate; Skarn; Fuka;

D O I：

10.2465/jmps.181121

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

Vimsite was found as a mass or a veinlet in crystalline limestone associated with gehlenite-spurrite skarns at the Fuka mine, Okayama Prefecture, Japan. Vimsite occurs as colorless to white aggregates of anhedral or prismatic transparent crystals up to 1 mm in length in association with shimazakiite, sibirskite, priceite, uralborite, calciborite, kurchatovite, and calcite. It is also formed as a 0.5 mm wide veinlet. An electron microprobe analysis of vimsite gave an empirical formula (Ca0.993Mg0.009Fe0.003Mn0.001)(Sigma 1.006)B1.996O2(OH)(4) based on O = 6. The unit cell parameters are a= 10.021(3), b = 9.566(4), c = 4.447(2) angstrom, beta= 91.231 (9)degrees. The calculated density is 2.523 g cm(-3). TheVickers microhardness is 186-206 kg mm(-2) (25 g load). It is likely that vimsite from the Fuka mine was formed by subsequent hydrothermal alteration, as with uralborite and priceite, of sibirskite produced by the hydrothermal alteration of shimazakiite.

引用

页码：219 / 223

页数：5

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