Suzukiite, Ba2V24+[O2|Si4O12], a new mineral from the Mogurazawa mine, Gumma Prefecture, Japan

Suzukiite, Ba2V24+[O2|Si4O12], a new mineral from the Mogurazawa mine, Gumma Prefecture, Japan
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铃木石,Ba2V24 [O2|Si4O12],一种来自日本群马县 Mogurazawa 矿的新矿物

DOI:
10.2465/minerj.11.15
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发表时间:
1982
期刊:
影响因子:
--
通讯作者:
Shunzo Yui
Shunzo Yui
中科院分区:
--
文献类型:
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作者:
S. Matsubara;A. Kato;Shunzo Yui

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Suzukiite,Ba2V4+2[O2| Si_4O_(12)],斜方晶系,Aamm或Aamam_2,a=7.089(2),B=15.261(2),c=5.364(1)A,Z=2,是一种新矿物,对应于钾镁矾的钡类似物Sr_2 V_(4 +2)[O_2|电子探针分析给出:BaO 38.38,SrO 3.21,VO 2 23.56,TiO 2 0.20,SiO 2 33.59,总量98.94%,得出经验公式(Ba_(1.78)Sr_(0.22))Sr_(2.00)(V_(4 + 2.02)Ti_(0.02))Sr_(2.04)Si_(3.97)O_(14))。解理{010},完全解理; {100}和{001},明显解理。比重4.0(obs.),密度4.03g/cm ~ 3(计算值);(莫氏)4到41/2在{010}。它是光学双轴负的,2 V约90°,r<v,非常强。折射率:α=1.730(5),β=1.739(计算),γ=1.748(5)。光学方位和轴向颜色:a=X=浅绿色,B=Y=浅黄色绿色,c=Z=蓝绿色绿色。铃木石发现于日本群马县吉柳市Mogurazawa矿层状锰矿存款的块状蔷薇辉石-蔷薇辉石矿石中,与石英、重晶石、长石棉和钡蔷薇辉石共生。
Suzukiite, Ba2V4+2[O2|Si4O12], orthorhombic, Amam or Amam2, a=7.089(2), b=15.261(2), c=5.364(1)A, Z=2, is a new mineral corresponding to the barium analogue of haradaite, Sr2V4+2[O2|Si4O12].The electron microprobe analysis gave : BaO 38.38, SrO 3.21, VO2 23.56, TiO2 0.20, SiO2 33.59, total 98.94%, yielding the empirical formula (Ba1.78Sr0.22) Σ2.00(V4+2.02Ti0.02)Σ2.04Si3.97O14 on the basis of O=14.It is bright green in colour with a vitreous lustre and pale green streak. Cleavages {010}, perfect; {100} and {001}, distinct. Specific gravity 4.0(obs.), density 4.03g/cm3(calc), H. (Mohs) 4 to 41/2 on {010}. It is optically biaxial negative, 2V about 90°, r<v, very strong. Refractive indices: α=1.730(5), β=1.739(calc), γ=1.748(5). Optical orientation and axial colours: a=X=pale green, b=Y=light yellowish green, c=Z= bluish green.Suzukiite is found in massive rhodonite-rhodochrosite ore from the bedded manganese ore deposit of the Mogurazawa mine, Kiryu City, Gumma Prefecture, Japan, in association with quartz, barite, nagashimalite and a barian roscoelite.