Manganrockbridgeite from the Jocão claim, Conselheiro Pena,
Minas Gerais, Brazil: chemistry, spectroscopic and structural
data

J 2024

Manganrockbridgeite from the Jocão claim, Conselheiro Pena, Minas Gerais, Brazil: chemistry, spectroscopic and structural data

TVRDÝ, Jaromír, Luboš VRTIŠKA, Jan FILIP, Zdeněk DOLNÍČEK, Radek ŠKODA et. al.

Basic information

Original name

Manganrockbridgeite from the Jocão claim, Conselheiro Pena, Minas Gerais, Brazil: chemistry, spectroscopic and structural data

Authors

TVRDÝ, Jaromír (203 Czech Republic, guarantor, belonging to the institution), Luboš VRTIŠKA (203 Czech Republic), Jan FILIP (203 Czech Republic), Zdeněk DOLNÍČEK (203 Czech Republic), Radek ŠKODA (203 Czech Republic, belonging to the institution), Martin PETR and Radana MALÍKOVÁ (203 Czech Republic, belonging to the institution)

Edition

Journal of Geosciences, Czech Geological Survey, 2024, 1802-6222

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10504 Mineralogy

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 1.400 in 2022

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.3190/jgeosci.387

UT WoS

001298823300002

Keywords in English

manganrockbridgeite; phosphate minerals; Jocão pegmatite; Minas Gerais; Brazil

Abstract

V originále

The world's second occurrence of the recently described manganrockbridgeite was found in a mineral assemblage in the Jocão (Cigana) pegmatite, Conselheiro Pena district, Minas Gerais (Brazil). Manganrockbridgeite forms green botryoidal-crystalline crusts with a velvety surface covering the walls of leached cavities in triphylite replaced by correianevesite and Mn-rich vivianite. The outer zone is significantly richer in Mn than the inner zone where the manganrockbridgeite passes to frondelite. Other associated minerals are hureaulite and kenngottite-like phosphate. Empirical formulae based on EPMA, Mössbauer and XPS spectroscopy are (Mn1.36Fe2+0.46Fe3+0.09Ca0.03Mg0.01□0.05)Σ2.00Fe3+2.95(PO4)3.00(OH)3.84(H2O)1.16 for the outer zone and (Mn1.03Fe2+0.49Fe3+0.29Ca0.03Mg0.02□0.14)Σ2.00Fe3+2.94(PO4)3.00(OH)3.81(H2O)1.19 for the inner zone of aggregates. Raman spectra and assignment of individual decomposed bands to vibrational modes show a good agreement with data published for frondelite from the Jocão locality. By powder diffraction data the studied manganrockbridgeite corresponds to the type material from Hagendorf-Süd, Germany. Unit-cell parameters for space group P21/m are a = 5.195(2) Å, b = 16.936(4) Å, c = 7.452(2) Å, β = 110.25(3)° and V = 615.1(4) Å3.

Links

MUNI/A/1271/2022, interní kód MU

Name: Geologické procesy Českém masivu a Západních Karpat

Investor: Masaryk University, Geological processes of Bohemian Massif and Western Carpathians

Citovat

TVRDÝ, Jaromír, Luboš VRTIŠKA, Jan FILIP, Zdeněk DOLNÍČEK, Radek ŠKODA, Martin PETR and Radana MALÍKOVÁ. Manganrockbridgeite from the Jocão claim, Conselheiro Pena, Minas Gerais, Brazil: chemistry, spectroscopic and structural data. Journal of Geosciences. Czech Geological Survey, 2024, vol. 69, No 2, p. 87-98. ISSN 1802-6222. Available from: https://dx.doi.org/10.3190/jgeosci.387.

@article{2420223,
   author = {Tvrdý, Jaromír and Vrtiška, Luboš and Filip, Jan and Dolníček, Zdeněk and Škoda, Radek and PETR, Martin and Malíková, Radana},
   article_number = {2},
   doi = {http://dx.doi.org/10.3190/jgeosci.387},
   keywords = {manganrockbridgeite; phosphate minerals; Jocão pegmatite; Minas Gerais; Brazil},
   language = {eng},
   issn = {1802-6222},
   journal = {Journal of Geosciences},
   title = {Manganrockbridgeite from the Jocão claim, Conselheiro Pena, Minas Gerais, Brazil: chemistry, spectroscopic and structural data},
   url = {http://www.jgeosci.org/content/jgeosci_387_Tvrdy.pdf},
   volume = {69},
   year = {2024}
}

TY  - JOUR
ID  - 2420223
AU  - Tvrdý, Jaromír - Vrtiška, Luboš - Filip, Jan - Dolníček, Zdeněk - Škoda, Radek - PETR, Martin - Malíková, Radana
PY  - 2024
TI  - Manganrockbridgeite from the Jocão claim, Conselheiro Pena, Minas Gerais, Brazil: chemistry, spectroscopic and structural data
JF  - Journal of Geosciences
VL  - 69
IS  - 2
SP  - 87-98
EP  - 87-98
PB  - Czech Geological Survey
SN  - 18026222
KW  - manganrockbridgeite
KW  - phosphate minerals
KW  - Jocão pegmatite
KW  - Minas Gerais
KW  - Brazil
UR  - http://www.jgeosci.org/content/jgeosci_387_Tvrdy.pdf
N2  - The world's second occurrence of the recently described manganrockbridgeite was found in a mineral assemblage in the Jocão (Cigana) pegmatite, Conselheiro Pena district, Minas Gerais (Brazil). Manganrockbridgeite forms green botryoidal-crystalline crusts with a velvety surface covering the walls of leached cavities in triphylite replaced by correianevesite and Mn-rich vivianite. The outer zone is significantly richer in Mn than the inner zone where the manganrockbridgeite passes to frondelite. Other associated minerals are hureaulite and kenngottite-like phosphate. Empirical formulae based on EPMA, Mössbauer and XPS spectroscopy are (Mn1.36Fe2+0.46Fe3+0.09Ca0.03Mg0.01□0.05)Σ2.00Fe3+2.95(PO4)3.00(OH)3.84(H2O)1.16 for the outer zone and (Mn1.03Fe2+0.49Fe3+0.29Ca0.03Mg0.02□0.14)Σ2.00Fe3+2.94(PO4)3.00(OH)3.81(H2O)1.19 for the inner zone of aggregates. Raman spectra and assignment of individual decomposed bands to vibrational modes show a good agreement with data published for frondelite from the Jocão locality. By powder diffraction data the studied manganrockbridgeite corresponds to the type material from Hagendorf-Süd, Germany. Unit-cell parameters for space group P21/m are a = 5.195(2) Å, b = 16.936(4) Å, c = 7.452(2) Å, β = 110.25(3)° and V = 615.1(4) Å3.
ER  -

TVRDÝ, Jaromír, Luboš VRTIŠKA, Jan FILIP, Zdeněk DOLNÍČEK, Radek ŠKODA, Martin PETR and Radana MALÍKOVÁ. Manganrockbridgeite from the Jocão claim, Conselheiro Pena, Minas Gerais, Brazil: chemistry, spectroscopic and structural data. \textit{Journal of Geosciences}. Czech Geological Survey, 2024, vol.~69, No~2, p.~87-98. ISSN~1802-6222. Available from: https://dx.doi.org/10.3190/jgeosci.387.

Detailed Information on Publication Record