2017
Babanekite, Cu-3(AsO4)(2) center dot 8H(2)O, from Jachymov, Czech Republic - a new member of the vivianite group
PLÁŠIL, Jakub, Pavel ŠKÁCHA, Jiří SEJKORA, Radek ŠKODA, Milan NOVÁK et. al.Základní údaje
Originální název
Babanekite, Cu-3(AsO4)(2) center dot 8H(2)O, from Jachymov, Czech Republic - a new member of the vivianite group
Autoři
PLÁŠIL, Jakub (203 Česká republika), Pavel ŠKÁCHA (203 Česká republika), Jiří SEJKORA (203 Česká republika), Radek ŠKODA (203 Česká republika, garant, domácí), Milan NOVÁK (203 Česká republika, domácí), František VESELOVSKY (203 Česká republika) a Jan HLOUŠEK (203 Česká republika)
Vydání
Journal of Geosciences, Praha, Česká geologická společnost, 2017, 1802-6222
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10504 Mineralogy
Stát vydavatele
Česká republika
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 1.415
Kód RIV
RIV/00216224:14310/17:00100332
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000423277800005
Klíčová slova anglicky
babanekite; new mineral; vivianite group; crystal structure; Jachymov
Změněno: 29. 3. 2018 09:58, Ing. Nicole Zrilić
Anotace
V originále
Babanekite, Cu-3(AsO4)(2) center dot 8H(2)O, a new member of the vivianite group was found in material originating from the Geister vein, Rovnost mine, Jachymov, Western Bohemia, Czech Republic. It occurs as a supergene alteration mineral in association with members of the lindackerite supergroup (veselovskyite, hlousekite, pradetite and lindackerite), lavendulan, gypsum and an X-ray amorphous Cu-Al-Si-O-H phase. Crystals of babanekite are pinkish to peach-colored, elongated, prismatic and up to 2 mm in length. They exhibit the forms {010}, {100}, {110}, {101} and less frequently also {001}. Crystals are transparent to translucent with a vitreous luster. The mineral has a light pinkish streak. Estimated Mohs hardness is between 1.5 and 2. The cleavage is perfect on {010}. The calculated density is 3.192 g/cm(3). Electron-microprobe analysis yielded CoO 8.89, NiO 4.06, CuO 15.31, ZnO 10.87, P2O5 0.16, As2O5 39.79, SO3 0.13, H2O 24.78 (calc.), total 103.99 wt.% giving the empirical formula (Cu1.12Zn0.78Co0.69Ni0.32)(Sigma 2.91)[(AsO4)(2.01)(PO4)(0.01)(SO4)(0.01)](Sigma 2.03) center dot 8H(2)O based on 16 O apfu. The ideal end-member formula of babanekite is Cu-3(AsO4)(2) center dot 8H(2)O, which requires CuO 38.95, As2O5 37.52, H2O 23.53, total 100.00 wt.%. Babanekite is monoclinic, C2/m, with a = 10.1729(3), b = 13.5088(4), c = 4.7496(1) angstrom, beta = 105.399(2)degrees, V = 629.28(3) angstrom(3) and Z = 2. The eight strongest X-ray powder diffraction lines are [d(obs) angstrom(I)(hkl)]: 7.936(11)(110), 6.743(100)(020), 3.231(14)(13-1), 2.715(11)(041), 2.3331(10)(15-1), 2.0819(5)(350), 1.6862(16)(080) and 1.6107(4)(55-1). The crystal structure of babanekite, refined to R-1 = 2.18 % for 864 unique observed reflections, confirmed that the atomic arrangement is similar to other members of the vivianite group of minerals. The mineral is named for Ing. Frantisek Babanek (1836-1910), Czech mining and geological expert, who worked in the Jachymov and Pribram mines.
Návaznosti
MUNI/A/1316/2015, interní kód MU |
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