Nollmotzite (IMA2017-100), Mg[UV(UVIO2)2F3O4](H2O)4, is a new uranium oxide fluoride mineral found in the Clara mine, Black Forest Mountains, Germany. Electron microprobe analysis provided the empirical formula (Mg1.06Cu0.02)Σ1.08[UV(UVIO2)2O3.85F3.15][(H2O)3.69(OH)0.31]Σ4.00 based on three U and 15 O + F atoms per formula unit. Nollmotzite is monoclinic, space group Cm, with a = 7.1015 (12) Å, b = 11.7489 (17) Å, c = 8.1954 (14) Å, β = 98.087 (14)°, V = 676.98 (19) Å3 and Z = 2. The crystal structure [twinned by reticular merohedry; refined to R = 0.0369 with GoF = 1.09 for 1527 unique observed reflections, I > 3σ(I)] is based upon [UV(UVIO2)2F3O4]2- sheets of β-U3O8 topology and contains an interlayer with MgF2(H2O)4 octahedra. Adjacent sheets are linked through F-Mg-F bonds, as well as via hydrogen bonds. The presence of fluorine and pentavalent uranium in the structure of nollmotzite has potentially important implications for the safe disposal of nuclear waste.

中文翻译：

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Nollmotzite，Mg[UV(UVIO2)2O4F3]·4H2O，第一个含氟天然氧化铀。

Nollmotzite (IMA2017-100)，Mg[UV(UVIO2)2F3O4](H2O)4，是一种新的氧化铀氟化物矿物，发现于德国黑森林山脉的克拉拉矿。电子探针分析根据3个U和15个O + F得出经验公式(Mg1.06Cu0.02)Σ1.08[UV(UVIO2)2O3.85F3.15][(H2O)3.69(OH)0.31]Σ4.00每个分子式单元的原子数。Nollmotzite 是单斜晶系，空间群 Cm，a = 7.1015 (12) Å，b = 11.7489 (17) Å，c = 8.1954 (14) Å，β = 98.087 (14)°，V = 676.98 (19) Å3 和 Z = 2.晶体结构[由网状正面体孪生；精炼至 R = 0.0369，GoF = 1.09，针对 1527 个独特的观察到的反射，I > 3σ(I)] 基于 [UV(UVIO2)2F3O4]2- β-U3O8 拓扑片层，并包含带有 MgF2(H2O)4 的中间层八面体。相邻的片材通过F-Mg-F键以及氢键连接。诺尔辉石结构中氟和五价铀的存在对于核废料的安全处置具有潜在的重要影响。