Švenekite, Ca[AsO2(OH)(2)](2), a new mineral from Jáchymov,
Czech Republic

J 2013

Švenekite, Ca[AsO2(OH)(2)](2), a new mineral from Jáchymov, Czech Republic

ONDRUŠ, Petr; Roman SKÁLA; Jakub PLÁŠIL; Jiří SEJKORA; František VESELOVSKY et al.

Základní údaje

Originální název

Švenekite, Ca[AsO2(OH)(2)](2), a new mineral from Jáchymov, Czech Republic

Autoři

Vydání

Mineralogical Magazine, London, Mineralogical Society, 2013, 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: 1.898

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/13:00069955

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1180/minmag.2013.077.6.02

UT WoS

000323989600001

Klíčová slova anglicky

švenekite; new mineral; calcium bis (dihydrogen-arsenate); crystal structure; Jáchymov

Štítky

AKR, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 1. 4. 2014 14:23, doc. Mgr. Radek Škoda, Ph.D.

Anotace

V originále

Svenekite (IMA 99-007), Ca[AsO2(OH)(2)](2), is a rare supergene arsenate mineral occurring in the Geschieber vein, Jachymov ore district, Western Bohemia, Czech Republic. It grows directly on the granite rocks and occurs isolated from other arsenate minerals otherwise common in Jachymov. Svenekite usually forms clear transparent coatings composed of indistinct radiating to rosette-shaped aggregates up to 3 mm across. They are composed of thin lens- or bladed-shaped crystals, usually 100-150 mu m long. Svenekite is transparent to translucent and has a white streak and a vitreous lustre; it does not fluoresce under ultraviolet light. Cleavage is very good on {010}. The Mohs hardness is similar to 2. Svenekite is biaxial, non-pleochroic. The refractive indices are alpha' = 1.602(2), gamma' = 1.658(2). The empirical formula of svenekite (based on As + P + S = 2 a.p.f.u., an average of 10 spot analyses) is (Ca1.00Mg0.01)(Sigma 1.01)[AsO2(OH)(2)](1.96)[PO2(OH)(2)](0.03)(SO4)(0.01). The simplified formula is Ca[AsO2(OH)(2)](2) and requires CaO 17.42, As2O5 71.39, H2O 11.19, total 100.00 wt.%. Raman and infrared spectroscopy exhibit dominance of O-H vibrations and vibration modes of distorted tetrahedral AsO2(OH)(2) units. Svenekite is triclinic, space group P (1) over bar, with a = 8.5606(5), b = 7.6926(6), c = 5.7206(4) angstrom, alpha = 92.605(6), beta = 109.9002(6), gamma = 109.9017(6)degrees, and V = 327.48(4) angstrom(3), Z = 2, D-calc = 3.26 g.cm(-3). The a:b:c ratio is 0.7436:1:1.1082 (for single-crystal data). The six strongest diffraction peaks in the X-ray powder diffraction pattern are [d (angstrom)/I(%)/(hkl)]: 3.968(33)(2 (1) over bar0); 3.766(35)(2 (1) over bar(1) over bar); 3.697(49)(101); 3.554(100)(020); 3.259(33)(2 (2) over bar0); 3.097(49)(1 (2) over bar1). The crystal structure of svenekite was refined from single-crystal X-ray diffraction data to R-1 = 0.0250 based on 1309 unique observed, and to wR(2) = 0.0588, for all 1588 unique reflections (with GOF(all) = 1.20). The structure of svenekite consists of sheets of corner-sharing CaO8 polyhedra and AsO2OH2 groups, stacked parallel to (001). Adjacent sheets are linked by hydrogen bonds. The svenekite structure possesses very short symmetrical hydrogen bonds (with the D-H lengths similar to 1.22 angstrom). The mineral is named to honour Jaroslav Svenek, the former curator of the mineralogical collection of the National Museum in Prague, Czech Republic.

Citovat

ONDRUŠ, Petr; Roman SKÁLA; Jakub PLÁŠIL; Jiří SEJKORA; František VESELOVSKY; Jiří ČEJKA; Anna KALLISTOVA; Jan HLOUŠEK; Karla FEJFAROVÁ; Radek ŠKODA; Michal DUŠEK; Ananda GABAŠOVÁ; Vladimír MACHOVIČ a Ladislav LAPČÁK. Švenekite, Ca[AsO2(OH)(2)](2), a new mineral from Jáchymov, Czech Republic. Mineralogical Magazine. London: Mineralogical Society, 2013, roč. 77, č. 6, s. 2711-2724. ISSN 0026-461X. Dostupné z: https://doi.org/10.1180/minmag.2013.077.6.02.

@article{1127689,
   author = {Ondruš, Petr and Skála, Roman and Plášil, Jakub and Sejkora, Jiří and Veselovsky, František and Čejka, Jiří and Kallistova, Anna and Hloušek, Jan and Fejfarová, Karla and Škoda, Radek and Dušek, Michal and Gabašová, Ananda and Machovič, Vladimír and Lapčák, Ladislav},
   article_location = {London},
   article_number = {6},
   doi = {https://doi.org/10.1180/minmag.2013.077.6.02},
   keywords = {švenekite; new mineral; calcium bis (dihydrogen-arsenate); crystal structure; Jáchymov},
   language = {eng},
   issn = {0026-461X},
   journal = {Mineralogical Magazine},
   title = {Švenekite, Ca[AsO2(OH)(2)](2), a new mineral from Jáchymov, Czech Republic},
   volume = {77},
   year = {2013}
}

TY  - JOUR
ID  - 1127689
AU  - Ondruš, Petr - Skála, Roman - Plášil, Jakub - Sejkora, Jiří - Veselovsky, František - Čejka, Jiří - Kallistova, Anna - Hloušek, Jan - Fejfarová, Karla - Škoda, Radek - Dušek, Michal - Gabašová, Ananda - Machovič, Vladimír - Lapčák, Ladislav
PY  - 2013
TI  - Švenekite, Ca[AsO2(OH)(2)](2), a new mineral from Jáchymov, Czech Republic
JF  - Mineralogical Magazine
VL  - 77
IS  - 6
SP  - 2711-2724
EP  - 2711-2724
PB  - Mineralogical Society
SN  - 0026461X
KW  - švenekite
KW  - new mineral
KW  - calcium bis (dihydrogen-arsenate)
KW  - crystal structure
KW  - Jáchymov
N2  - Svenekite (IMA 99-007), Ca[AsO2(OH)(2)](2), is a rare supergene arsenate mineral occurring in the Geschieber vein, Jachymov ore district, Western Bohemia, Czech Republic. It grows directly on the granite rocks and occurs isolated from other arsenate minerals otherwise common in Jachymov. Svenekite usually forms clear transparent coatings composed of indistinct radiating to rosette-shaped aggregates up to 3 mm across. They are composed of thin lens- or bladed-shaped crystals, usually 100-150 mu m long. Svenekite is transparent to translucent and has a white streak and a vitreous lustre; it does not fluoresce under ultraviolet light. Cleavage is very good on {010}. The Mohs hardness is similar to 2. Svenekite is biaxial, non-pleochroic. The refractive indices are alpha' = 1.602(2), gamma' = 1.658(2). The empirical formula of svenekite (based on As + P + S = 2 a.p.f.u., an average of 10 spot analyses) is (Ca1.00Mg0.01)(Sigma 1.01)[AsO2(OH)(2)](1.96)[PO2(OH)(2)](0.03)(SO4)(0.01). The simplified formula is Ca[AsO2(OH)(2)](2) and requires CaO 17.42, As2O5 71.39, H2O 11.19, total 100.00 wt.%. Raman and infrared spectroscopy exhibit dominance of O-H vibrations and vibration modes of distorted tetrahedral AsO2(OH)(2) units. Svenekite is triclinic, space group P (1) over bar, with a = 8.5606(5), b = 7.6926(6), c = 5.7206(4) angstrom, alpha = 92.605(6), beta = 109.9002(6), gamma = 109.9017(6)degrees, and V = 327.48(4) angstrom(3), Z = 2, D-calc = 3.26 g.cm(-3). The a:b:c ratio is 0.7436:1:1.1082 (for single-crystal data). The six strongest diffraction peaks in the X-ray powder diffraction pattern are [d (angstrom)/I(%)/(hkl)]: 3.968(33)(2 (1) over bar0); 3.766(35)(2 (1) over bar(1) over bar); 3.697(49)(101); 3.554(100)(020); 3.259(33)(2 (2) over bar0); 3.097(49)(1 (2) over bar1). The crystal structure of svenekite was refined from single-crystal X-ray diffraction data to R-1 = 0.0250 based on 1309 unique observed, and to wR(2) = 0.0588, for all 1588 unique reflections (with GOF(all) = 1.20). The structure of svenekite consists of sheets of corner-sharing CaO8 polyhedra and AsO2OH2 groups, stacked parallel to (001). Adjacent sheets are linked by hydrogen bonds. The svenekite structure possesses very short symmetrical hydrogen bonds (with the D-H lengths similar to 1.22 angstrom). The mineral is named to honour Jaroslav Svenek, the former curator of the mineralogical collection of the National Museum in Prague, Czech Republic.
ER  -

ONDRUŠ, Petr; Roman SKÁLA; Jakub PLÁŠIL; Jiří SEJKORA; František VESELOVSKY; Jiří ČEJKA; Anna KALLISTOVA; Jan HLOUŠEK; Karla FEJFAROVÁ; Radek ŠKODA; Michal DUŠEK; Ananda GABAŠOVÁ; Vladimír MACHOVIČ a Ladislav LAPČÁK. Švenekite, Ca[AsO2(OH)(2)](2), a new mineral from Jáchymov, Czech Republic. \textit{Mineralogical Magazine}. London: Mineralogical Society, 2013, roč.~77, č.~6, s.~2711-2724. ISSN~0026-461X. Dostupné z: https://doi.org/10.1180/minmag.2013.077.6.02.

Přehled o publikaci