Babanekite, Cu-3(AsO4)(2) center dot 8H(2)O, from Jachymov, Czech Republic - a new member of the vivianite group

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00100332" target="_blank" >RIV/00216224:14310/17:00100332 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.3190/jgeosci.248" target="_blank" >http://dx.doi.org/10.3190/jgeosci.248</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.248" target="_blank" >10.3190/jgeosci.248</a>

Result language

angličtina

Original language name

Babanekite, Cu-3(AsO4)(2) center dot 8H(2)O, from Jachymov, Czech Republic - a new member of the vivianite group

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10504 - Mineralogy

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geosciences

ISSN

1802-6222

e-ISSN

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Volume of the periodical

62

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

10

Pages from-to

261-270

UT code for WoS article

000423277800005

EID of the result in the Scopus database

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