A new occurrence of austinite, CaZnAsO4(OH), conichalcite, CaCuAsO4(OH), and zincolivenite, CuZnAsO4(OH), is described from the Tripi mine, Peloritani Mountains, Sicily, Italy. These species have been observed in euhedral crystals in vugs of a calcite vein and were characterised using single-crystal X-ray diffraction, electron microprobe analysis and micro-Raman spectroscopy. Austinite and conichalcite have isotypic relations, both crystallising in space group P212121. Unit-cell parameters of austinite are a = 7.4931(5), b = 9.0256(6), c = 5.9155(4) Å, V = 400.06(5) Å3; its crystal structure was refined on the basis of 1210 unique reflections with Fo > 4σ(Fo) and 77 least-square parameters to R1 = 0.0236. Conichalcite has unit-cell parameters a = 7.419(10), b = 9.111(11), c = 5.867(7) Å and V = 396.6(1.4) Å3; the diffraction quality of its available grains was not good enough to allow a high-quality structural refinement. Chemical formulae of austinite and conichalcite are Ca1.04(1)Zn0.86(4)Cu0.09(4)As0.98(2)P0.02(1)O4(OH)0.98 and Ca0.98(1)Fe2+0.02(4)Cu0.69(10)Zn0.30(6)As0.97(2)P0.03(1)O4(OH)0.98, respectively. The new chemical data on the austinite–conichalcite isotypic pair, coupled with previous analyses, supports a possible miscibility gap between the compositions (Zn0.25Cu0.75) and (Zn0.50Cu0.50). Zincolivenite has unit-cell parameters a = 8.4594(9), b = 8.5324(8), c = 5.9893(6) Å, V = 432.30(12) Å3 and space group Pnnm; its crystal structure was refined to R1 = 0.0230 for 523 unique reflections with Fo > 4σ(Fo) and 47 least-square parameters. Its chemical composition is Cu0.73(5)Zn1.25(5)As1.01(1)O4(OH)1.01. The refinement of the crystal structure supports the ordering of Cu and Zn in two different crystallographic sites. Micro-Raman spectra of austinite, conichalcite and zincolivenite are discussed, with a focus on the O–H stretching region where local Zn and Cu arrangements affect the position of Raman bands in zincolivenite. These arsenates probably play an environmental role in the Peloritani area, where the occurrence of high contents of some potentially toxic elements in soils and stream sediments has been reported.

意大利西西里岛 Peloritani 山脉 Tripi 矿区描述了一种新出现的奥氏体 CaZnAsO 4 (OH)、锥辉石 CaCuAsO 4 (OH) 和锌橄榄石 CuZnAsO 4 (OH)。这些物质已在方解石脉的孔洞中的自形晶体中观察到，并使用单晶 X 射线衍射、电子微探针分析和显微拉曼光谱进行了表征。奥斯汀石和锥辉石具有同型关系，均在空间群P 2 1 2 1 2 1中结晶。奥氏体晶胞参数为a = 7.4931(5), b = 9.0256(6), c = 5.9155(4) Å, V = 400.06(5) Å 3；其晶体结构基于 1210 个F o > 4σ( F o ) 的独特反射和 77 个最小二乘参数进行细化，直至R 1 = 0.0236。锥辉石的晶胞参数为a = 7.419(10)、b = 9.111(11)、c = 5.867(7) Å 和V = 396.6(1.4) Å 3；其可用晶粒的衍射质量不足以实现高质量的结构细化。奥氏体和贝辉石的化学式为Ca 1.04(1) Zn 0.86(4) Cu 0.09(4) As 0.98(2) P 0.02(1) O 4 (OH) 0.98和 Ca 0.98(1) Fe 2+ 0.02(4) ) Cu 0.69(10) Zn 0.30(6) As 0.97(2) P 0.03(1) O 4 (OH) 0.98。奥氏体-锥铜矿同型对的新化学数据与之前的分析相结合，支持了成分 (Zn 0.25 Cu 0.75 ) 和 (Zn 0.50 Cu 0.50 ) 之间可能存在混溶性差距。锌橄榄石的晶胞参数为a = 8.4594(9)、b = 8.5324(8)、c = 5.9893(6) Å、V = 432.30(12) Å 3和空间群Pnnm；其晶体结构被细化为R 1 = 0.0230，具有 523 个独特的反射，且F o > 4σ( F o ) 和 47 个最小二乘参数。其化学成分为Cu 0.73(5) Zn1.25(5) As 1.01(1) O 4 (OH) 1.01。晶体结构的细化支持了 Cu 和 Zn 在两个不同晶体位点的有序排列。讨论了奥氏体、贝辉石和锌橄榄石的显微拉曼光谱，重点是 O-H 拉伸区域，其中局部 Zn 和 Cu 排列影响锌橄榄石中拉曼带的位置。这些砷酸盐可能在佩洛里塔尼地区发挥着环境作用，据报道，该地区的土壤和溪流沉积物中某些潜在有毒元素的含量很高。