Glikinite, Zn3O(SO4)(2), a new anhydrous zinc oxysulfate mineral structurally based on OZn(4 )tetrahedra

摘要

A new mineral glikinite, ideally Zn3O(SO4)(2), was found in high-temperature exhalative mineral assemblages in the Arsenatnaya fumarole, Second scoria cone of the Great Tolbachik Fissure Eruption (1975-1976), Tolbachik volcano, Kamchatka Peninsula, Russia. Glikinite is associated closely with langbeinite, lammerite-B, bradaczekite, euchlorine, anhydrite, chalcocyanite and tenorite. It is monoclinic, P2(1) /m, a= 7.298(18), b = 6.588(11), c= 7.840(12) angstrom, beta = 117.15(3)degrees, V= 335.4(11) angstrom(3) and R-1 = 0.046. The eight strongest lines of the powder X-ray diffraction pattern [d in angstrom (I) (hkl)] are: 6.969(56)(00 (1) over bar), 3.942(52)(101), 3.483(100)(00 (2) over bar), 3.294(49)(020), 2.936(43)(120), 2.534 (63)(201), 2.501(63)(20 (3) over bar) and 2.395(86)(02 (2) over bar). The chemical composition determined by electron-microprobe analysis is (wt.%): ZnO 42.47, CuO 19.50, SO3 39.96, total 101.93. The empirical formula calculated on the basis of O = 9 apfu is Zn2.07Cu0.97S1.98O9 and simplified formula is Zn3O(SO4)(2). Glikinite is a Zn,Cu analogue of synthetic Zn3O(SO4)(2). The crystal structure of glikinite is based on OZn4 tetrahedra sharing common corners, thus forming [Zn3O](4+) chains. Sulfate groups interconnect [Zn3O](4+) chains into a 3D framework.