Polarized FTIR spectroscopic examination on hydroxylation in
the minerals of the wolframite group,
(Fe,Mn,Mg)[W,(Nb,Ta)][O,(OH)]4

J 2017

Polarized FTIR spectroscopic examination on hydroxylation in the minerals of the wolframite group, (Fe,Mn,Mg)[W,(Nb,Ta)][O,(OH)]4

TALLA, Dominik, Anton BERAN, Radek ŠKODA and Zdeněk LOSOS

Basic information

Original name

Polarized FTIR spectroscopic examination on hydroxylation in the minerals of the wolframite group, (Fe,Mn,Mg)[W,(Nb,Ta)][O,(OH)]4

Authors

TALLA, Dominik (203 Czech Republic, belonging to the institution), Anton BERAN (40 Austria), Radek ŠKODA (203 Czech Republic, belonging to the institution) and Zdeněk LOSOS (203 Czech Republic, guarantor, belonging to the institution)

Edition

American Mineralogist, CHANTILLY, USA, Mineralogical Society of America, 2017, 0003-004X

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10500 1.5. Earth and related environmental sciences

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 2.645

RIV identification code

RIV/00216224:14310/17:00096912

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.2138/am-2017-5664

UT WoS

000401108600017

Keywords in English

wolframite;FTIR spectroscopy;OH defects;nominally anhydrous minerals;deuteration;flux synthesis

Abstract

V originále

Polarized FTIR spectroscopic measurements of 11 natural wolframite single crystals from different occurrences revealed the common presence of structurally bound OH groups in their crystal lattice, with potential influence on the properties of thisse geologically and technologically important group of compounds. Despite differences in the appearance of the OH absorption pattern, dependent among other on the end-member ratio, two types of “intrinsic” OH defects could be discerned from detailed studies of the pleochroic behavior of the absorption bands both at 80 K and room temperature. The accompanying chemical analyses by the electron microprobe helped to clearly identify the substitution trend W6+ + O2– = (Nb,Ta)5+ + OH– as the prevailing hydrogen incorporation mechanism into wolframite. The assignment of the observed IR absorption phenomena to hydrous defects was confirmed by the results of deuteration experiments and the negligible contribution of included impurities to the FTIR spectra in the OH absorption region. The results obtained in this study of natural wolframite crystals can be used to detect and analyze hydrous defects in synthetic technologically important tungstates.

Links

CZ.1.07/2.3.00/20.0052, interní kód MU

Name: Výzkumný tým pro ukládání radioaktivních odpadů a jadernou bezpečnost

Investor: Ministry of Education, Youth and Sports of the CR, 2.3 Human resources in research and development

Citovat

TALLA, Dominik, Anton BERAN, Radek ŠKODA and Zdeněk LOSOS. Polarized FTIR spectroscopic examination on hydroxylation in the minerals of the wolframite group, (Fe,Mn,Mg)[W,(Nb,Ta)][O,(OH)]4. American Mineralogist. CHANTILLY, USA: Mineralogical Society of America, 2017, vol. 102, No 4, p. 867-875. ISSN 0003-004X. Available from: https://dx.doi.org/10.2138/am-2017-5664.

@article{1382563,
   author = {Talla, Dominik and Beran, Anton and Škoda, Radek and Losos, Zdeněk},
   article_location = {CHANTILLY, USA},
   article_number = {4},
   doi = {http://dx.doi.org/10.2138/am-2017-5664},
   keywords = {wolframite;FTIR spectroscopy;OH defects;nominally anhydrous minerals;deuteration;flux synthesis},
   language = {eng},
   issn = {0003-004X},
   journal = {American Mineralogist},
   title = {Polarized FTIR spectroscopic examination on hydroxylation in the minerals of the wolframite group, (Fe,Mn,Mg)[W,(Nb,Ta)][O,(OH)]4},
   volume = {102},
   year = {2017}
}

TY  - JOUR
ID  - 1382563
AU  - Talla, Dominik - Beran, Anton - Škoda, Radek - Losos, Zdeněk
PY  - 2017
TI  - Polarized FTIR spectroscopic examination on hydroxylation in the minerals of the wolframite group, (Fe,Mn,Mg)[W,(Nb,Ta)][O,(OH)]4
JF  - American Mineralogist
VL  - 102
IS  - 4
SP  - 867-875
EP  - 867-875
PB  - Mineralogical Society of America
SN  - 0003004X
KW  - wolframite;FTIR spectroscopy;OH defects;nominally anhydrous minerals;deuteration;flux synthesis
N2  - Polarized FTIR spectroscopic measurements of 11 natural wolframite single crystals from different occurrences revealed the common presence of structurally bound OH groups in their crystal lattice, with potential influence on the properties of thisse geologically and technologically important group of compounds. Despite differences in the appearance of the OH absorption pattern, dependent among other on the end-member ratio, two types of “intrinsic” OH defects could be discerned from detailed studies of the pleochroic behavior of the absorption bands both at 80 K and room temperature. The accompanying chemical analyses by the electron microprobe helped to clearly identify the substitution trend W6+ + O2– = (Nb,Ta)5+ + OH– as the prevailing hydrogen incorporation mechanism into wolframite. The assignment of the observed IR absorption phenomena to hydrous defects was confirmed by the results of deuteration experiments and the negligible contribution of included impurities to the FTIR spectra in the OH absorption region. The results obtained in this study of natural wolframite crystals can be used to detect and analyze hydrous defects in synthetic technologically important tungstates.
ER  -

TALLA, Dominik, Anton BERAN, Radek ŠKODA and Zdeněk LOSOS. Polarized FTIR spectroscopic examination on hydroxylation in the minerals of the wolframite group, (Fe,Mn,Mg)[W,(Nb,Ta)][O,(OH)]4. \textit{American Mineralogist}. CHANTILLY, USA: Mineralogical Society of America, 2017, vol.~102, No~4, p.~867-875. ISSN~0003-004X. Available from: https://dx.doi.org/10.2138/am-2017-5664.

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