The new quaternary lithogallate Sr2LiGaO4 was prepared by conventional solid-state synthesis in a welded tantalum ampoule at T = 850 °C. Single-crystal X-ray diffraction was used to elucidate the crystal structure of the compound, which crystallizes in the orthorhombic space group Pnma (no. 62) with the lattice parameters a = 11.2434(4), b = 5.6879(2), and c = 6.6983(2) Å. The phase composition of the powder sample was determined by Rietveld refinement based on X-ray diffraction data. The crystal structure is composed of layers of corner-sharing LiO4 and GaO4 tetrahedra with alternating orientation parallel to the crystallographic bc plane. The eightfold coordinated strontium atoms are arranged in a zigzag manner between the layers forming two types of double-capped trigonal prismatic SrO8 units with common faces. The crystal structure of Sr2LiGaO4 is isotypic to that of the lithoaluminate derivate Sr1.85Ba0.15LiAlO4.

中文翻译：

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四元石镓酸盐Sr2LiGaO4的晶体结构

新型四元石没食子酸盐 Sr2氧化镓锂4是在焊接钽安瓿中通过常规固态合成在时间= 850°C。单晶X射线衍射用于阐明该化合物的晶体结构，该化合物在斜方空间群中结晶普马（第 62 号）与晶格参数A= 11.2434(4),乙= 5.6879(2)，并且C= 6.6983(2) 埃。粉末样品的相组成通过基于 X 射线衍射数据的 Rietveld 精修确定。晶体结构由共享角的Li2O层组成4和氧化镓4具有与晶体平行的交替方向的四面体公元前飞机。八重配位的锶原子在层间以之字形排列，形成两种类型的双帽三角柱形 SrO8具有共同面孔的单位。Sr的晶体结构2氧化镓锂4与锂铝酸盐衍生物 Sr 是同型的1.85巴0.15铝酸锂4。