Paulišite, Ca2Zn(CO3)3·2H2O, a new mineral with a novel crystal
structure

J 2025

Paulišite, Ca2Zn(CO3)3·2H2O, a new mineral with a novel crystal structure

SEJKORA, Jiří; Cristian BIAGIONI; Zdeněk DOLNÍČEK; Radek ŠKODA; Jana EDEROVÁ et. al.

Basic information

Original name

Paulišite, Ca2Zn(CO3)3·2H2O, a new mineral with a novel crystal structure

Authors

SEJKORA, Jiří; Cristian BIAGIONI; Zdeněk DOLNÍČEK; Radek ŠKODA (203 Czech Republic, belonging to the institution) and Jana EDEROVÁ

Edition

American Mineralogist, Mineralogical Society of America, 2025, 0003-004X

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10504 Mineralogy

Country of publisher

United States of America

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Impact factor

Impact factor: 2.700 in 2023

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.2138/am-2024-9418

UT WoS

001437504800010

EID Scopus

2-s2.0-105000465908

Keywords in English

carbonate; crystal structure; Czech Republic; Kaňk near Kutná Hora; new mineral; Paulišite; zinc

Abstract

V originále

Paulišite, Ca2Zn(CO3)3·2H2O, is a new mineral species discovered in the underground workings at the abandoned mine adit of the first level of the Staročeské Lode, near the historical shaft Šafary, Kaňk near Kutná Hora, central Bohemia, Czech Republic. Paulišite is associated with hydrozincite and aragonite (holotype sample) or calcite, aragonite, hydrozincite, and monohydrocalcite (other samples). The new mineral occurs as crusts, up to 1 cm thick, formed by parallel or radial aggregates of acicular crystals, elongated on [100], up to 5 mm long. Paulišite is colorless to white, with a white streak. It is transparent and has a vitreous luster. Mohs hardness is ca. 4; the calculated density is 2.756 g/cm3. Paulišite is optically biaxial positive, with α = 1.554(1), β = 1.569(2), γ= 1.605(1) (589 nm), and 2V(meas) = 68(2)°. The empirical formula, based on electron-microprobe analyses (n = 11), is Ca2.00(Zn0.97Mg0.02 Cu0.01Al0.01)σ1.01(CO3)3·2H2O based on three cations (excluding C) per formula unit. The ideal formula is Ca2Zn(CO3)3·2H2O, which requires (in wt%) CaO 31.02, ZnO 22.50, CO2 36.51, H2O 9.97, total 100.00. The strongest reflections of the powder X-ray diffraction pattern [d (Å)/(Irel)/hkl] are: 8.226/(100)/011, 6.492/(100)/002, 4.112/(18)/022, 3.246/(35)/004, 3.085/(19)/130, and 2.458/(21)/042. According to single-crystal X-ray diffraction data, paulišite is monoclinic, space group Ia, Z = 4 with a = 6.3007(6), b = 10.6236(11), c = 12.9837(12) Å, β = 90.840(5)°, V = 868.99(15) Å3. The crystal structure was refined to R1 = 0.0229 for 2330 unique reflections with F o > 4σ(Fo) and 164 refined parameters. It is characterized by Zn(1)-centered tetrahedra, two independent Ca(1)- and Ca(2)-centered polyhedra, and CO3 groups. Heteropolyhedral Ca-Zn-CO3 {001} layers occur in paulišite and are connected along c through CO3 groups and Ca(2)-centered polyhedra, as well as H-bonds. Along with minrecordite, skorpionite, and znucalite, paulišite is the fourth mineral containing Ca, Zn, and (CO3) groups as species-defining elements. Its origin is related to the supergene alteration of ore deposits following the mining activity, probably at low T and basic pH conditions. The mineral and its name, honoring the Czech mineralogist and geologist Petr Pauliš (b. 1956), have been approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (no. 2023-031).

Cite

SEJKORA, Jiří; Cristian BIAGIONI; Zdeněk DOLNÍČEK; Radek ŠKODA and Jana EDEROVÁ. Paulišite, Ca2Zn(CO3)3·2H2O, a new mineral with a novel crystal structure. American Mineralogist. Mineralogical Society of America, 2025, vol. 110, No 3, p. 480-488. ISSN 0003-004X. Available from: https://dx.doi.org/10.2138/am-2024-9418.

@article{2491222,
   author = {Sejkora, Jiří and Biagioni, Cristian and Dolníček, Zdeněk and Škoda, Radek and Ederová, Jana},
   article_number = {3},
   doi = {http://dx.doi.org/10.2138/am-2024-9418},
   keywords = {carbonate; crystal structure; Czech Republic; Kaňk near Kutná Hora; new mineral; Paulišite; zinc},
   language = {eng},
   issn = {0003-004X},
   journal = {American Mineralogist},
   title = {Paulišite, Ca2Zn(CO3)3·2H2O, a new mineral with a novel crystal structure},
   url = {https://doi.org/10.2138/am-2024-9418},
   volume = {110},
   year = {2025}
}

TY  - JOUR
ID  - 2491222
AU  - Sejkora, Jiří - Biagioni, Cristian - Dolníček, Zdeněk - Škoda, Radek - Ederová, Jana
PY  - 2025
TI  - Paulišite, Ca2Zn(CO3)3·2H2O, a new mineral with a novel crystal structure
JF  - American Mineralogist
VL  - 110
IS  - 3
SP  - 480-488
EP  - 480-488
PB  - Mineralogical Society of America
SN  - 0003004X
KW  - carbonate
KW  - crystal structure
KW  - Czech Republic
KW  - Kaňk near Kutná Hora
KW  - new mineral
KW  - Paulišite
KW  - zinc
UR  - https://doi.org/10.2138/am-2024-9418
N2  - Paulišite, Ca2Zn(CO3)3·2H2O, is a new mineral species discovered in the underground workings at the abandoned mine adit of the first level of the Staročeské Lode, near the historical shaft Šafary, Kaňk near Kutná Hora, central Bohemia, Czech Republic. Paulišite is associated with hydrozincite and aragonite (holotype sample) or calcite, aragonite, hydrozincite, and monohydrocalcite (other samples). The new mineral occurs as crusts, up to 1 cm thick, formed by parallel or radial aggregates of acicular crystals, elongated on [100], up to 5 mm long. Paulišite is colorless to white, with a white streak. It is transparent and has a vitreous luster. Mohs hardness is ca. 4; the calculated density is 2.756 g/cm3. Paulišite is optically biaxial positive, with α = 1.554(1), β = 1.569(2), γ= 1.605(1) (589 nm), and 2V(meas) = 68(2)°. The empirical formula, based on electron-microprobe analyses (n = 11), is Ca2.00(Zn0.97Mg0.02 Cu0.01Al0.01)σ1.01(CO3)3·2H2O based on three cations (excluding C) per formula unit. The ideal formula is Ca2Zn(CO3)3·2H2O, which requires (in wt%) CaO 31.02, ZnO 22.50, CO2 36.51, H2O 9.97, total 100.00. The strongest reflections of the powder X-ray diffraction pattern [d (Å)/(Irel)/hkl] are: 8.226/(100)/011, 6.492/(100)/002, 4.112/(18)/022, 3.246/(35)/004, 3.085/(19)/130, and 2.458/(21)/042. According to single-crystal X-ray diffraction data, paulišite is monoclinic, space group Ia, Z = 4 with a = 6.3007(6), b = 10.6236(11), c = 12.9837(12) Å, β = 90.840(5)°, V = 868.99(15) Å3. The crystal structure was refined to R1 = 0.0229 for 2330 unique reflections with F o > 4σ(Fo) and 164 refined parameters. It is characterized by Zn(1)-centered tetrahedra, two independent Ca(1)- and Ca(2)-centered polyhedra, and CO3 groups. Heteropolyhedral Ca-Zn-CO3 {001} layers occur in paulišite and are connected along c through CO3 groups and Ca(2)-centered polyhedra, as well as H-bonds. Along with minrecordite, skorpionite, and znucalite, paulišite is the fourth mineral containing Ca, Zn, and (CO3) groups as species-defining elements. Its origin is related to the supergene alteration of ore deposits following the mining activity, probably at low T and basic pH conditions. The mineral and its name, honoring the Czech mineralogist and geologist Petr Pauliš (b. 1956), have been approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (no. 2023-031).
ER  -

SEJKORA, Jiří; Cristian BIAGIONI; Zdeněk DOLNÍČEK; Radek ŠKODA and Jana EDEROVÁ. Paulišite, Ca2Zn(CO3)3·2H2O, a new mineral with a novel crystal structure. \textit{American Mineralogist}. Mineralogical Society of America, 2025, vol.~110, No~3, p.~480-488. ISSN~0003-004X. Available from: https://dx.doi.org/10.2138/am-2024-9418.

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