Rüdlingerite, Mn22+V5+As5+O7 center dot 2H(2)O, a New Species Isostructural with Fianelite
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00117568" target="_blank" >RIV/00216224:14310/20:00117568 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3390/min10110960" target="_blank" >https://doi.org/10.3390/min10110960</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/min10110960" target="_blank" >10.3390/min10110960</a>
Alternative languages
Result language
angličtina
Original language name
Rüdlingerite, Mn22+V5+As5+O7 center dot 2H(2)O, a New Species Isostructural with Fianelite
Original language description
The new mineral species rudlingerite, ideally Mn22+V5+As5+O7 center dot 2H(2)O, occurs in the Fianel mine, in Val Ferrera, Grisons, Switzerland, a small Alpine metamorphic Mn deposit. It is associated with ansermetite and Fe oxyhydroxide in thin fractures in Triassic dolomitic marbles. Rudlingerite was also found in specimens recovered from the dump of the Valletta mine, Canosio, Cuneo, Piedmont, Italy, where it occurs together with massive braccoite and several other As- and V-rich phases in richly mineralized veins crossing the quartz-hematite ore. The new mineral displays at both localities yellow to orange, flattened elongated prismatic, euhedral crystals measuring up to 300 mu m in length. Electron-microprobe analysis of rudlingerite from Fianel gave (in wt%): MnO 36.84, FeO 0.06, As2O5, 25.32, V2O5 28.05, SiO2 0.13, H2Ocalc 9.51, total 99.91. On the basis of 9 O anions per formula unit, the chemical formula of rudlingerite is Mn-1.97(V-1.17(5+) As0.83Si0.01)(sigma 2.01)O-7 center dot 2H(2)O. The main diffraction lines are [d(obs) in angstrom (I-obs) hkl]: 3.048 (100) 022, 5.34 (80) 120, 2.730 (60) 231, 2.206 (60) 16-1, 7.28 (50) 020, 2.344 (50) 250, 6.88 (40) 110, and 2.452 (40) 320. Study of the crystal structure showcases a monoclinic unit cell, space group P2(1)/n, with a = 7.8289(2) angstrom, b = 14.5673(4) angstrom, c = 6.7011(2) angstrom, beta = 93.773(2)degrees, V = 762.58(4) angstrom(3), Z = 4. The crystal structure has been solved and refined to R-1 = 0.041 on the basis of 3784 reflections with F-o > 4 sigma(F). It shows Mn2+ hosted in chains of octahedra that are subparallel to [-101] and bound together by pairs of tetrahedra hosted by V5+ and As5+, building up a framework. Additional linkage is provided by hydrogen-bonding through H2O coordinating Mn2+ at the octahedra. One tetrahedrally coordinated site is dominated by V5+, (T)((1))(V0.88As0.12), corresponding to an observed site scattering of 24.20 electrons per site (eps), whereas the second site is strongly dominated by As5+,(T)((2))(As0.74V0.26), with, accordingly, a higher observed site scattering of 30.40 eps. The new mineral has been approved by the IMA-CNMNC and named for Gottfried Rudlinger (born 1919), a pioneer in the 1960-1980s, in the search and study of the small minerals from the Alpine manganese mineral deposits of Grisons.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10504 - Mineralogy
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Minerals
ISSN
2075-163X
e-ISSN
2075-163X
Volume of the periodical
10
Issue of the periodical within the volume
11
Country of publishing house
CH - SWITZERLAND
Number of pages
15
Pages from-to
1-15
UT code for WoS article
000593412500001
EID of the result in the Scopus database
2-s2.0-85094902366