Stergiouite is a new mineral from the Plaka area in the northern part of the Lavrion Mining District, Greece. The mineral occurs as clusters of stacked, platy crystals, associated with galena, sphalerite, native arsenic and sulfur. The crystals are white to colorless, with a pearly luster and white streak. No luminescence under ultraviolet (UV) radiation is observed. Stergiouite is brittle and has a Mohs hardness of ~3. Chemical analysis gave As2O5 42.93 wt%; Sb2O5 2.45 wt%; CaO 10.90 wt%; ZnO 29.79 wt%; and H2Ocalc 13.93 wt%, which corresponds to an empirical formula Ca1.02Zn1.91((As0.95Sb0.08)O4)Σ2.03 · 4H2O. The ideal formula is CaZn2(AsO4)2 · 4H2O. Stergiouite is monoclinic, space group Pc, with unit-cell parameters a 9.416(2) Å; b 5.300(1) Å; c 10.893(2) Å; β 91.767(10)°; V 543.36(3) Å3; Z = 2. The strongest lines in the Gandolfi X-ray powder pattern [d in Å, I/I100, (hkl)] are: 9.406, 100, (100); 4.619, 80, (102), (110); 3.612, 35, (202¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \overline{2} $$\end{document}); 3.494, 35, (112); 2.984, 60, (212¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \overline{2} $$\end{document}); 2.922, 50, (212); 2.720, 20, (004); and 2.647, 25, (020). The crystal structure was refined based on single-crystal X-ray diffraction data to R1 = 0.046, wR2 = 0.093. The observed mass density of 3.1(2) g cm−3 compares well with the calculated value (3.183 g cm−3). The framework structure of stergiouite is built up by one type of CaO2(H2O)4 octahedron and each two ZnO4 and AsO4 tetrahedra. These polyhedra share common corners to form three- and four-membered rings. A system of hydrogen bonds (O–O range: 2.70–3.02 Å) further stabilizes the structure. The crystal structure of stergiouite is closely related to that of phosphophyllite [Fe[6]Zn2[4](PO4)2 · 4H2O] as well as with members of the hopeite [Zn[6]Zn2[4](PO4)2 · 4H2O] group. Stergiouite is named in honour of Vasilis Stergiou (born 1958) in recognition of his contributions to the mineralogy of the Lavrion deposits.

中文翻译：

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Stergiouite, CaZn2 (AsO4) 2 4H2O - 来自希腊 Lavrion 矿区的一种新矿物

Stergiouite 是来自希腊 Lavrion 矿区北部 Plaka 地区的一种新矿物。这种矿物以堆叠的片状晶体簇状出现，与方铅矿、闪锌矿、天然砷和硫有关。晶体为白色至无色，具有珍珠光泽和白色条纹。在紫外线 (UV) 辐射下未观察到发光。Stergiouite 很脆，莫氏硬度约为 3。化学分析得到 42.93 wt% 的 As2O5；Sb2O5 2.45 wt%；CaO 10.90重量％；氧化锌 29.79 重量％；和 H2Ocalc 13.93 wt%，对应于经验公式 Ca1.02Zn1.91 ((As0.95Sb0.08) O4) Σ2.03 4H2O。理想的分子式是 CaZn2 (AsO4) 2 4H2O。Stergiouite 是单斜晶系，空间群 Pc，晶胞参数 a 9.416 (2) Å；b 5,300 (1) 埃；c 10.893 (2) 埃；β 91,767 (10)°；V 543.36 (3) Å3；Z = 2。Gandolfi X 射线粉末图谱中最强的谱线 [d in Å, I / I100, (hkl)] 为：9.406, 100, (100)；4,619, 80, (102), (110); 3.612, 35, (202¯ \ documentclass [12pt] {minimal} \ usepackage {amsmath} \ usepackage {wasysym} \ usepackage {amsfonts} \ usepackage {amssymb} \ usepackage {amsbsy} \ usepackage {mathrsfs} \ usepackage {upgreek} \ setlength {\oddsidemargin} {- 69pt} \ begin {document} $$ \ overline {2} $$ \ end {document}); 3,494, 35, (112); 2.984, 60, (212¯ \ documentclass [12pt] {minimal} \ usepackage {amsmath} \ usepackage {wasysym} \ usepackage {amsfonts} \ usepackage {amssymb} \ usepackage {amsbsy} \ usepackage {mathrsfs} \ usepackage {upgreek} \ setlength {\oddsidemargin} {- 69pt} \ begin {document} $$ \ overline {2} $$ \ end {document}); 2,922, 50, (212); 2.720, 20, (004); 和 2.647, 25, (020)。根据单晶X射线衍射数据将晶体结构细化至R1 = 0.046，wR2 = 0.093。观察到的质量密度 3.1 (2) g cm - 3 与计算值 (3.183 g cm - 3) 相当。无菌骨架结构由一种CaO2(H2O)4八面体和每两个ZnO4和AsO4四面体构成。这些多面体共享共同的角以形成三元环和四元环。氢键系统（橙色：2.70-3.02 Å）进一步稳定了结构。辉石的晶体结构与磷叶石 [Fe [6] Zn2 [4] (PO4) 2 · 4H2O] 以及磷叶石的成员 [Zn [6] Zn2 [4] (PO4) 2 · 密切相关4H2O]组。Stergiouite 以 Vasilis Stergiou（生于 1958 年）的名字命名，以表彰他对 Lavrion 矿床矿物学的贡献。无菌骨架结构由一种CaO2(H2O)4八面体和每两个ZnO4和AsO4四面体构成。这些多面体共享共同的角以形成三元环和四元环。氢键系统（橙色：2.70-3.02 Å）进一步稳定了结构。辉石的晶体结构与磷叶石 [Fe [6] Zn2 [4] (PO4) 2 · 4H2O] 以及磷叶石的成员 [Zn [6] Zn2 [4] (PO4) 2 · 密切相关4H2O]组。Stergiouite 以 Vasilis Stergiou（生于 1958 年）的名字命名，以表彰他对 Lavrion 矿床矿物学的贡献。无菌骨架结构由一种CaO2(H2O)4八面体和每两个ZnO4和AsO4四面体构成。这些多面体共享共同的角以形成三元环和四元环。氢键系统（橙色：2.70-3.02 Å）进一步稳定了结构。辉石的晶体结构与磷叶石 [Fe [6] Zn2 [4] (PO4) 2 · 4H2O] 以及磷叶石的成员 [Zn [6] Zn2 [4] (PO4) 2 · 密切相关4H2O]组。Stergiouite 以 Vasilis Stergiou（生于 1958 年）的名字命名，以表彰他对 Lavrion 矿床矿物学的贡献。02 Å) 进一步稳定结构。辉石的晶体结构与磷叶石 [Fe [6] Zn2 [4] (PO4) 2 · 4H2O] 以及磷叶石的成员 [Zn [6] Zn2 [4] (PO4) 2 · 密切相关4H2O]组。Stergiouite 以 Vasilis Stergiou（生于 1958 年）的名字命名，以表彰他对 Lavrion 矿床矿物学的贡献。02 Å) 进一步稳定结构。辉石的晶体结构与磷叶石 [Fe [6] Zn2 [4] (PO4) 2 · 4H2O] 以及磷叶石的成员 [Zn [6] Zn2 [4] (PO4) 2 · 密切相关4H2O]组。Stergiouite 以 Vasilis Stergiou（生于 1958 年）的名字命名，以表彰他对 Lavrion 矿床矿物学的贡献。