Abstract We have investigated the crystal structure of the synthetic analogue of the mineral iwateite using powder diffraction and Raman spectroscopy. Na2BaMn(PO4)2 crystallizes in the space group P 3 ‾ $‾{3}$ m1 (No. 164) with cell parameters a = 5.37292(1) Å, and c = 7.09538(1) Å (R wp = 5.7%, V = 177.38 Å3, Z = 1). The space group assignment is supported by the experimentally observed 11 Raman active modes which agree with the expected number of modes for the P 3 ‾ $‾{3}$ m1 symmetry.

中文翻译：

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岩手石合成类似物 Na2BaMn(PO4)2 的晶体结构：X 射线粉末衍射和拉曼研究

摘要 我们使用粉末衍射和拉曼光谱研究了矿物岩手岩的合成类似物的晶体结构。Na2BaMn(PO4)2 在空间群 P 3 ‾ $‾{3}$ m1 (No. 164) 中结晶，晶胞参数 a = 5.37292(1) Å，c = 7.09538(1) Å (R wp = 5.7% , V = 177.38 Å3, Z = 1)。空间群分配得到实验观察到的 11 种拉曼活性模式的支持，这些模式与 P 3 ‾ $‾{3}$ m1 对称性的预期模式数一致。