Škáchaite, CaCo(CO3)2, a new member of the dolomite group, from
the Brod deposit near Příbram, Czech Republic

J 2024

Škáchaite, CaCo(CO3)2, a new member of the dolomite group, from the Brod deposit near Příbram, Czech Republic

SEJKORA, Jiří; Jakub PLÁŠIL; Zdeněk DOLNÍČEK; Jana ULMANOVÁ; Radek ŠKODA et. al.

Základní údaje

Originální název

Škáchaite, CaCo(CO3)2, a new member of the dolomite group, from the Brod deposit near Příbram, Czech Republic

Autoři

SEJKORA, Jiří; Jakub PLÁŠIL; Zdeněk DOLNÍČEK; Jana ULMANOVÁ a Radek ŠKODA (203 Česká republika, domácí)

Vydání

Mineralogical Magazine, Cambridge University Press, 2024, 0026-461X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10504 Mineralogy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 1.400

Kód RIV

RIV/00216224:14310/24:00139113

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1180/mgm.2024.21

UT WoS

001232016900001

EID Scopus

2-s2.0-85190119803

Klíčová slova anglicky

skachaite; new mineral; carbonate; cobalt; dolomite group; crystal structure; Brod deposit; P & rcaron;& iacute;bram ore area; Czech Republic

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 18. 3. 2025 13:58, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Škáchaite (IMA2022–143) is a new mineral species discovered in samples from the hydrothermal vein B117, shaft No. 6 at the Brod deposit of the uranium and base-metal Příbram ore district, central Bohemia, Czech Republic. Škáchaite is a Co-dominant member of the dolomite group and forms anhedral grains up to 50 μm in size and as 20–100 μm thick growth zones in škáchaite–dolomite crystals as a part of carbonate (dolomite, calcite, siderite, spherocobaltite, ankerite, kutnohorite and minrecordite) gangue, associated with native silver, sulfides and arsenides. Škáchaite is pale to bright pink with vitreous lustre. The Mohs hardness is ca. 3½–4, similar to other members of the dolomite group. The calculated density is 3.140 g.cm–3. Škáchaite is optically uniaxial (–); the indices of refraction are ω = 1.741(3) and ɛ = 1.535(3). On the basis of electron-microprobe analyses, its empirical formula is Ca1.00(Co0.45Mg0.38Ca0.08Fe0.05Mn0.03Zn0.01)Σ1.00(CO3)2. The ideal formula is CaCo(CO3)2, which requires (in wt.%) CaO 25.60, CoO 34.21, CO2 40.19, a total of 100.00. Škáchaite is trigonal, R, with unit-cell parameters a = 4.8177(18), c = 16.093(7) Å, V = 323.5(2) Å3 and Z = 3. The strongest reflections of the calculated powder X-ray diffraction pattern [d, Å, (Irel, %) hkl] are: 3.704 (13) 10; 2.896 (100) 104; 2.409 (15) 110; 2.019 (17) 202; 1.812 (19) 10; and 1.792 (16) 11. According to the single-crystal X-ray diffraction data (R1 = 0.0304 for 94 reflections with [I > 3σ(I)]), the crystal structure of škáchaite is isotypic with its Mg-analogue, dolomite. The Raman spectrum of škáchaite, as well as the tentative assignment of observed bands, are given in this paper. The mineral is named in honour of Pavel Škácha, a Czech mineralogist and curator of the mineralogical collection of the Mining Museum Příbram, Czech Republic.

Návaznosti

90251, velká výzkumná infrastruktura

Název: CzechNanoLab II

Citovat

SEJKORA, Jiří; Jakub PLÁŠIL; Zdeněk DOLNÍČEK; Jana ULMANOVÁ a Radek ŠKODA. Škáchaite, CaCo(CO3)2, a new member of the dolomite group, from the Brod deposit near Příbram, Czech Republic. Mineralogical Magazine. Cambridge University Press, 2024, roč. 88, č. 3, s. 255-261. ISSN 0026-461X. Dostupné z: https://doi.org/10.1180/mgm.2024.21.

@article{2485008,
   author = {Sejkora, Jiří and Plášil, Jakub and Dolníček, Zdeněk and Ulmanová, Jana and Škoda, Radek},
   article_number = {3},
   doi = {https://doi.org/10.1180/mgm.2024.21},
   keywords = {skachaite; new mineral; carbonate; cobalt; dolomite group; crystal structure; Brod deposit; P & rcaron;& iacute;bram ore area; Czech Republic},
   language = {eng},
   issn = {0026-461X},
   journal = {Mineralogical Magazine},
   title = {Škáchaite, CaCo(CO3)2, a new member of the dolomite group, from the Brod deposit near Příbram, Czech Republic},
   url = {https://doi.org/10.1180/mgm.2024.21},
   volume = {88},
   year = {2024}
}

TY  - JOUR
ID  - 2485008
AU  - Sejkora, Jiří - Plášil, Jakub - Dolníček, Zdeněk - Ulmanová, Jana - Škoda, Radek
PY  - 2024
TI  - Škáchaite, CaCo(CO3)2, a new member of the dolomite group, from the Brod deposit near Příbram, Czech Republic
JF  - Mineralogical Magazine
VL  - 88
IS  - 3
SP  - 255-261
EP  - 255-261
PB  - Cambridge University Press
SN  - 0026461X
KW  - skachaite
KW  - new mineral
KW  - carbonate
KW  - cobalt
KW  - dolomite group
KW  - crystal structure
KW  - Brod deposit
KW  - P &
KW  - rcaron;&
KW  - iacute;bram ore area
KW  - Czech Republic
UR  - https://doi.org/10.1180/mgm.2024.21
N2  - Škáchaite (IMA2022–143) is a new mineral species discovered in samples from the hydrothermal vein B117, shaft No. 6 at the Brod deposit of the uranium and base-metal Příbram ore district, central Bohemia, Czech Republic. Škáchaite is a Co-dominant member of the dolomite group and forms anhedral grains up to 50 μm in size and as 20–100 μm thick growth zones in škáchaite–dolomite crystals as a part of carbonate (dolomite, calcite, siderite, spherocobaltite, ankerite, kutnohorite and minrecordite) gangue, associated with native silver, sulfides and arsenides. Škáchaite is pale to bright pink with vitreous lustre. The Mohs hardness is ca. 3½–4, similar to other members of the dolomite group. The calculated density is 3.140 g.cm–3. Škáchaite is optically uniaxial (–); the indices of refraction are ω = 1.741(3) and ɛ = 1.535(3). On the basis of electron-microprobe analyses, its empirical formula is Ca1.00(Co0.45Mg0.38Ca0.08Fe0.05Mn0.03Zn0.01)Σ1.00(CO3)2. The ideal formula is CaCo(CO3)2, which requires (in wt.%) CaO 25.60, CoO 34.21, CO2 40.19, a total of 100.00. Škáchaite is trigonal, R, with unit-cell parameters a = 4.8177(18), c = 16.093(7) Å, V = 323.5(2) Å3 and Z = 3. The strongest reflections of the calculated powder X-ray diffraction pattern [d, Å, (Irel, %) hkl] are: 3.704 (13) 10; 2.896 (100) 104; 2.409 (15) 110; 2.019 (17) 202; 1.812 (19) 10; and 1.792 (16) 11. According to the single-crystal X-ray diffraction data (R1 = 0.0304 for 94 reflections with [I > 3σ(I)]), the crystal structure of škáchaite is isotypic with its Mg-analogue, dolomite. The Raman spectrum of škáchaite, as well as the tentative assignment of observed bands, are given in this paper. The mineral is named in honour of Pavel Škácha, a Czech mineralogist and curator of the mineralogical collection of the Mining Museum Příbram, Czech Republic.
ER  -

SEJKORA, Jiří; Jakub PLÁŠIL; Zdeněk DOLNÍČEK; Jana ULMANOVÁ a Radek ŠKODA. Škáchaite, CaCo(CO3)2, a new member of the dolomite group, from the Brod deposit near Příbram, Czech Republic. \textit{Mineralogical Magazine}. Cambridge University Press, 2024, roč.~88, č.~3, s.~255-261. ISSN~0026-461X. Dostupné z: https://doi.org/10.1180/mgm.2024.21.

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