Klajite, MnCu4(AsO4)(2)(AsO3OH)(2)(H2O)(10), from Jachymov
(Czech Republic): the second world occurrence

J 2014

Klajite, MnCu4(AsO4)(2)(AsO3OH)(2)(H2O)(10), from Jachymov (Czech Republic): the second world occurrence

PLÁŠIL, Jakub; Anatoly KASATKIN; Radek ŠKODA a Pavel ŠKACHA

Základní údaje

Originální název

Klajite, MnCu4(AsO4)(2)(AsO3OH)(2)(H2O)(10), from Jachymov (Czech Republic): the second world occurrence

Autoři

PLÁŠIL, Jakub; Anatoly KASATKIN; Radek ŠKODA a Pavel ŠKACHA

Vydání

Mineralogical Magazine, Middlesex, Mineralogical Society, 2014, 0026-461X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 2.026

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/14:00080022

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

klajite; oxide zone; lindackerite group; arsenate hydrate; crystal structure; bond valence; Jachymov

Štítky

AKR, rivok

Změněno: 13. 4. 2015 15:29, Ing. Andrea Mikešková

Anotace

V originále

Klajite, MnCu4(AsO4)(2)(AsO3OH)(2)(H2O)(10), the Mn-Cu-bearing member of the lindackerite group, was found in Jachymov, Czech Republic, as the second world occurrence. It is associated with ondrusite and other arsenate minerals growing on the quartz gangue with disseminated primary sulfides, namely tennantite and chalcopyrite. Electron-microprobe data showed klajite aggregates to be chemically inhomogeneous at larger scales, varying from Mn-Ca-rich to Cu-rich domains. The chemical composition of the the Mn-rich parts of aggregates can be expressed by the empirical formula (Mn0.46Ca0.22Cu0.07Mg0.02)(Sigma 0.77)(Cu3.82Mg0.14Ca0.03Zn0.01)(Sigma 4.00)(As1.94Si0.06)(Sigma 2.00) O-8[AsO2.73(OH)(1.27)](2)(H2O)(10) (mean of seven representative spots; calculated on the basis of As + Si + P = 4 a.p.f.u. (atoms per formula unit) and 10 H2O from ideal stoichiometry), showing a slight cationic deficiency at the key Me-site. According to single-crystal X-ray diffraction, klajite from Jachymov is triclinic, P (1) over bar, with a = 6.4298(8), b = 7.9716(8), c = 10.707(2) angstrom, alpha = 85.737(12)degrees, beta = 80.994(13)degrees, gamma = 84.982(10)degrees, and V = 538.85(14) angstrom(3), Z = 1. The crystal structure was refined to R-1 = 0.0628 for 1034 unique observed reflections (with I-obs > 3 sigma(I)), confirming that klajite (Mn-Cu member) and ondrusite (Ca-Cu member) are isostructural. The current data-set allowed determination of the positions of several hydrogen atoms. Discussion on hydrogen bonding networks in the structure of klajite as well as detailed bond-valence analysis are provided.

Citovat

PLÁŠIL, Jakub; Anatoly KASATKIN; Radek ŠKODA a Pavel ŠKACHA. Klajite, MnCu4(AsO4)(2)(AsO3OH)(2)(H2O)(10), from Jachymov (Czech Republic): the second world occurrence. Mineralogical Magazine. Middlesex: Mineralogical Society, 2014, roč. 78, č. 1, s. 119-129. ISSN 0026-461X. Dostupné z: https://doi.org/10.1180/minmag.2014.078.1.09.

@article{1297336,
   author = {Plášil, Jakub and Kasatkin, Anatoly and Škoda, Radek and Škacha, Pavel},
   article_location = {Middlesex},
   article_number = {1},
   doi = {https://doi.org/10.1180/minmag.2014.078.1.09},
   keywords = {klajite; oxide zone; lindackerite group; arsenate hydrate; crystal structure; bond valence; Jachymov},
   language = {eng},
   issn = {0026-461X},
   journal = {Mineralogical Magazine},
   title = {Klajite, MnCu4(AsO4)(2)(AsO3OH)(2)(H2O)(10), from Jachymov (Czech Republic): the second world occurrence},
   volume = {78},
   year = {2014}
}

TY  - JOUR
ID  - 1297336
AU  - Plášil, Jakub - Kasatkin, Anatoly - Škoda, Radek - Škacha, Pavel
PY  - 2014
TI  - Klajite, MnCu4(AsO4)(2)(AsO3OH)(2)(H2O)(10), from Jachymov (Czech Republic): the second world occurrence
JF  - Mineralogical Magazine
VL  - 78
IS  - 1
SP  - 119-129
EP  - 119-129
PB  - Mineralogical Society
SN  - 0026461X
KW  - klajite
KW  - oxide zone
KW  - lindackerite group
KW  - arsenate hydrate
KW  - crystal structure
KW  - bond valence
KW  - Jachymov
N2  - Klajite, MnCu4(AsO4)(2)(AsO3OH)(2)(H2O)(10), the Mn-Cu-bearing member of the lindackerite group, was found in Jachymov, Czech Republic, as the second world occurrence. It is associated with ondrusite and other arsenate minerals growing on the quartz gangue with disseminated primary sulfides, namely tennantite and chalcopyrite. Electron-microprobe data showed klajite aggregates to be chemically inhomogeneous at larger scales, varying from Mn-Ca-rich to Cu-rich domains. The chemical composition of the the Mn-rich parts of aggregates can be expressed by the empirical formula (Mn0.46Ca0.22Cu0.07Mg0.02)(Sigma 0.77)(Cu3.82Mg0.14Ca0.03Zn0.01)(Sigma 4.00)(As1.94Si0.06)(Sigma 2.00) O-8[AsO2.73(OH)(1.27)](2)(H2O)(10) (mean of seven representative spots; calculated on the basis of As + Si + P = 4 a.p.f.u. (atoms per formula unit) and 10 H2O from ideal stoichiometry), showing a slight cationic deficiency at the key Me-site. According to single-crystal X-ray diffraction, klajite from Jachymov is triclinic, P (1) over bar, with a = 6.4298(8), b = 7.9716(8), c = 10.707(2) angstrom, alpha = 85.737(12)degrees, beta = 80.994(13)degrees, gamma = 84.982(10)degrees, and V = 538.85(14) angstrom(3), Z = 1. The crystal structure was refined to R-1 = 0.0628 for 1034 unique observed reflections (with I-obs > 3 sigma(I)), confirming that klajite (Mn-Cu member) and ondrusite (Ca-Cu member) are isostructural. The current data-set allowed determination of the positions of several hydrogen atoms. Discussion on hydrogen bonding networks in the structure of klajite as well as detailed bond-valence analysis are provided.
ER  -

PLÁŠIL, Jakub; Anatoly KASATKIN; Radek ŠKODA a Pavel ŠKACHA. Klajite, MnCu4(AsO4)(2)(AsO3OH)(2)(H2O)(10), from Jachymov (Czech Republic): the second world occurrence. \textit{Mineralogical Magazine}. Middlesex: Mineralogical Society, 2014, roč.~78, č.~1, s.~119-129. ISSN~0026-461X. Dostupné z: https://doi.org/10.1180/minmag.2014.078.1.09.

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