Mostrar el registro sencillo del ítem
dc.contributor.author
Galliski, Miguel Angel
dc.contributor.author
Marquez Zavalia, Maria Florencia
dc.contributor.author
Cerný, Petr
dc.contributor.author
Lira, Raul
dc.contributor.author
Colombo, Fernando
dc.contributor.author
Roberts, Adrew C.
dc.contributor.author
Berhardt, Heinz Jurgen
dc.date.available
2019-07-01T20:26:09Z
dc.date.issued
2016-07
dc.identifier.citation
Galliski, Miguel Angel; Marquez Zavalia, Maria Florencia; Cerný, Petr; Lira, Raul; Colombo, Fernando; et al.; Achalaite, Fe2+TiNb2O8: a new member of the wodginite group from the Calandria Granitic Pegmatite, Córdoba, Argentina; Mineralogical Association of Canada; Canadian Mineralogist; 54; 4; 7-2016; 1043-1052
dc.identifier.issn
0008-4476
dc.identifier.uri
http://hdl.handle.net/11336/78975
dc.description.abstract
Achalaite is a new mineral of the wodginite group from the La Calandria granitic pegmatite, Cãnada del Puerto, Córdoba province, Argentina (318250S, 648550W). The mineral occurs as polygranular aggregates up to 1.5 cm across, included in albite 6 quartz with exsolutions of Ta-rich rutile and intergrown with microlite-group minerals. Achalaite has a black color and streak, metallic luster, H = 5=, Dcalc = 6.285 g/cm3, and appears to lack cleavage. In reflected light, it is light grey with a slightly violet tint in air, and light grey with an olive tint in oil. Its bireflectance in both air and oil is weak but noticeable. Pleochroism is not observed. With crossed polarizers anisotropy in air is weak, particularly noticeable along grain boundaries; in oil, it is medium with light to intermediate olive grey tint. Internal reflections have not been observed either in air or oil. Data on minimum and maximum reflectances for the COM wavelengths are [k (nm): Rair, Roil (%)]: 470: 16.89, 17.72 and 5.26, 5.76; 546: 16.49, 17.26 and 4.98, 5.32; 589: 16.34, 17.04 and 4.97, 5.26; 650: 16.23, 16.94 and 4.86, 5.19. Achalaite, indexed by analogy with wodginite, is monoclinic, space group C2/c, Z=4. Refined unit-cell dimensions are a 9.422(4) A° , b 11.427(3) A° , c 5.120(1) A° , b 90.128 (4), V 551.2(3) A°3. The strongest five lines in the X-ray powder diffraction pattern are as follows (d [A° ], I%, hkl): 3.630, 40, 220; 2.964, 100, 221, 221; 2.493, 40, 041; 1.735, 40, 402; 1.711, 50, 441, 441. Eight electron microprobe analyses (WDS) gave the following mean composition: WO3 2.41, Nb2O5 30.18, Ta2O5 37.56, TiO2 6.90, ZrO2 0.88, SnO2 3.82, Fe2O3 4.35, FeO 7.54, MnO 5.14, CaO 0.02, UO2 0.38, total 99.18 wt.%. The average empirical formula is: (Fe2+ 2.211Mn1.524Fe3+ 0.226U0.030Ca0.009)R4.000(Ti1.819Fe3+ 0.920Ta0.579Sn0.533Zr0.150)R4.000(Nb4.781Ta3.000W0.219)R8.000O32, ideally Fe2+TiNb2O8. Achalaite is the first member of the wodginite group with Nb dominant over Ta; it is genetically considered a post-magmatic phase. The name of achalaite (CNMNC - IMA 2013-103) derives from the Achala granite batholith, located in Ćordoba, Argentina.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Mineralogical Association of Canada
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Achalaite
dc.subject
Argentina
dc.subject
Granitic Pegmatite
dc.subject
Nb-Dominant Endmember
dc.subject
Wodginite Group
dc.subject.classification
Mineralogía
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Achalaite, Fe2+TiNb2O8: a new member of the wodginite group from the Calandria Granitic Pegmatite, Córdoba, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-05-23T18:48:10Z
dc.journal.volume
54
dc.journal.number
4
dc.journal.pagination
1043-1052
dc.journal.pais
Canadá
dc.journal.ciudad
Toronto
dc.description.fil
Fil: Galliski, Miguel Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.description.fil
Fil: Marquez Zavalia, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.description.fil
Fil: Cerný, Petr. University of Manitoba; Canadá
dc.description.fil
Fil: Lira, Raul. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina
dc.description.fil
Fil: Colombo, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina. Institut de Ciencia de Materials de Barcelona; España
dc.description.fil
Fil: Roberts, Adrew C.. Geological Survey Of Canada; Canadá
dc.description.fil
Fil: Berhardt, Heinz Jurgen. Ruhr Universität Bochum; Alemania
dc.journal.title
Canadian Mineralogist
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.3749/canmin.1500094
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/canmin/article/54/4/899/521035/complex-nb-ta-ti-sn-oxide-mineral-intergrowths-in
Archivos asociados