The Mössbauer, infrared and Raman spectra of iron-rich oxyphlogopite from a new locality, the Bartoy occurrence, Transbaikalia, Russia were obtained and its crystal structure was solved. The mineral is characterized by the absence of OH groups and ordered distribution of Fe2+ and Fe3+ between sites having octahedral coordination. Unlike oxyphlogopite holotype sample which is monoclinic (1M polytype), iron-rich oxyphlogopite belongs to the 3T polytype (space group P3112) with the unit-cell parameters a = 5.3248(2) Å, c = 29.788(3) Å, V = 731.44(8) Å3. Its refined crystal-chemical formula is (Z = 3): A(K0.9Na0.1) [M1(Fe2+0.6Mg0.4) M2(Fe3+0.4Ti0.4Mg0.2) M3(Mg0.4Fe3+0.3Ti0.2Al0.1)] [T1,2(Si0.7Al0.3)2O5]2X(O0.9F0.1)2.

中文翻译：

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来自 Bartoy 火山田、Transbaikalia 的富铁氧金云母的 3T 多型：穆斯堡尔、红外、拉曼光谱和晶体结构

获得了俄罗斯 Transbaikalia 巴托伊矿区富铁氧金云母的穆斯堡尔光谱、红外光谱和拉曼光谱，并解析了其晶体结构。该矿物的特点是不存在 OH 基团，并且 Fe2+ 和 Fe3+ 在具有八面体配位的位点之间有序分布。与单斜晶系（1M 多型）金云母正模样品不同，富铁氧金云母属于 3T 多型（空间群 P3112），晶胞参数 a = 5.3248(2) Å, c = 29.788(3) Å, V = 731.44(8) Å3。其精制晶体化学式为(Z = 3)： A(K0.9Na0.1) [M1(Fe2+0.6Mg0.4) M2(Fe3+0.4Ti0.4Mg0.2) M3(Mg0.4Fe3+0.3Ti0 .2Al0.1)] [T1,2(Si0.7Al0.3)2O5]2X(O0.9F0.1)2。