Abuite, CaAl2(PO4)(2)F-2, a new mineral from the Hinomaru-Nago mine, Yamaguchi Prefecture, Japan

作者：Enju Satomi^*; Uehara Seiichiro

来源：Journal of Mineralogical and Petrological Sciences, 2017, 112(3): 109-115.

DOI：10.2465/jmps.170131

• Abuite
• Hinomaru-Nago mine
• Al-phosphates
• Gatumbaite
• New mineral

Abuite was found in hydrothermally altered rocks in the Hinomaru- Nago mine, Kiyo area, Abu, Abu County, Yamaguchi Prefecture, Japan (34 degrees 53'N 131 degrees 52'E). Abuite is often included in aluminum phosphate rich samples, embedded with quartz and augelite and/or trolleite, and is often accompanied by other phosphates especially apatite and crandallite. Abuite is transparent and colorless with white streak and vitreous luster. It is very difficult to find them in bare eyes, since the dominant phases in aluminum phosphate rich samples, augelite, trolleite, and quartz, are all also transparent and colorless. The empirical formula of abuite (based on 10 anions pfu, O = 8, F + OH = 2) is (Ca0.99Sr0.01)(1.00)Al1.96P2.03O8(F1.89OH0.11). H2O was calculated by stoichiometry. The simplified formula is CaAl2(PO4)(2)F-2. Abuite is the calcium analogue of SrAl2(PO4)(2)F-2, which was synthesized by hydrothermal methods (Le Meins and Courbion, 1998). The crystal structure is orthorhombic, with space group P2(1)2(1)2(1). Unit cell parameters refined from the obtained X-ray diffraction pattern are a = 11.818(2), b = 11.993(3), c = 4.6872(8) angstrom and V = 664.3(2) angstrom(3), with Z = 4.

• 出版日期2017-6