Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina

Autores
Kampf, Anthony R.; Colombo, Fernando; González del Tánago, José
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Gayite, ideally NaMn2+Fe3+5 (PO 4)4(OH)6·2H2O, is a new member of the dufrénite group found at the Gigante granitic pegmatite, Punilla department, Córdoba province, Argentina. It is named for Hebe D. Gay (b. 1927), Professor Emeritus of Mineralogy of the National University of Córdoba (Argentina). The new mineral is monoclinic, space group C2/c, a = 25.975(3) Å, b = 5.1766(3) Å, c = 13.929(1) Å, β = 111.293(2)°, Z = 4. The strongest lines in the X-ray powder diffraction pattern are [d in Å, (I)]: 12.054 (33), 5.045 (60), 4.147 (37), 3.424 (71), 3.179 (100), 3.004 (33), 2.881 (42), 2.426 (36), 2.109 (39), 1.585 (50). It occurs associated with morinite, natrodufrénite, and quartz in cavities in massive apatite-(CaF), as clusters of tabular crystals up to 130 μm on edge dominated by {100}, with subordinate {201̄} and possibly also {110}, {111}, and {111̄}. Crystals display striations parallel to [010]. The mineral is greenish black with an olive green streak and vitreous luster. Thin tablets are transparent. Gayite is brittle, with perfect {100} cleavage and irregular fracture. Its Mohs hardness is 4 to 5. The measured density is 3.15(5) g/cm3, and the calculated density is 3.241 g/cm3. The mineral dissolves slowly in dilute HCl. Gayite is biaxial (+), α = 1.787(3), β = 1.792(3), γ = 1.806(3), 2Vmeas = 60(5)°, 2Vcalc = 62.1°; moderate dispersion, r < v; strong pleochroism, X (bluish-green) > Z (orange) > Y (yellow); orientation Y = b, X ∧ a = 48° in obtuse β. Analysis by electron microprobe (average of 28 analyses given in wt%) provided TiO2 0.12, Al 2O3 3.10, Fe2O3 41.95, MnO 5.97, MgO 0.08, CaO 0.23, ZnO 0.15, Na2O 3.03, P2O5 32.73, and H2O (calculated by stoichiometry) 10.31, total 97.67 wt%. The empirical formula, based on 24 O, is (Na0.85Ca0..02) ∑0.87 (Mn0.742+Fe0.12 2+Mg0.02Zn0.02Ti0.01) 4+∑0.90 (Fe4.473+Al 0.53)∑5.00 (P4.03O16)(OH) 6·2H2O. The crystal structure (R1 = 6.10%) shows gayite to be a member of the dufrénite group, along with dufrénite, natrodufrénite, matioliite, and burangaite. The structure is a framework consisting of Fe3+O6 octahedra, Mn2+O6octahedra, and PO4 tetrahedra with channels along the b axis containing Na atoms. The most unusual feature of the structure is an octahedral face-sharing Fe3+-Mn2+-Fe 3+ trimer.
Fil: Kampf, Anthony R.. Natural History Museum Of Los Angeles County; Estados Unidos
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
Fil: González del Tánago, José. Universidad Complutense de Madrid; España
Materia
Argentina
Córdoba
Dufrénite Group
Gayite
New Mineral
Pegmatite Phosphate
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/55346

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spelling Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, ArgentinaKampf, Anthony R.Colombo, FernandoGonzález del Tánago, JoséArgentinaCórdobaDufrénite GroupGayiteNew MineralPegmatite Phosphatehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Gayite, ideally NaMn2+Fe3+5 (PO 4)4(OH)6·2H2O, is a new member of the dufrénite group found at the Gigante granitic pegmatite, Punilla department, Córdoba province, Argentina. It is named for Hebe D. Gay (b. 1927), Professor Emeritus of Mineralogy of the National University of Córdoba (Argentina). The new mineral is monoclinic, space group C2/c, a = 25.975(3) Å, b = 5.1766(3) Å, c = 13.929(1) Å, β = 111.293(2)°, Z = 4. The strongest lines in the X-ray powder diffraction pattern are [d in Å, (I)]: 12.054 (33), 5.045 (60), 4.147 (37), 3.424 (71), 3.179 (100), 3.004 (33), 2.881 (42), 2.426 (36), 2.109 (39), 1.585 (50). It occurs associated with morinite, natrodufrénite, and quartz in cavities in massive apatite-(CaF), as clusters of tabular crystals up to 130 μm on edge dominated by {100}, with subordinate {201̄} and possibly also {110}, {111}, and {111̄}. Crystals display striations parallel to [010]. The mineral is greenish black with an olive green streak and vitreous luster. Thin tablets are transparent. Gayite is brittle, with perfect {100} cleavage and irregular fracture. Its Mohs hardness is 4 to 5. The measured density is 3.15(5) g/cm3, and the calculated density is 3.241 g/cm3. The mineral dissolves slowly in dilute HCl. Gayite is biaxial (+), α = 1.787(3), β = 1.792(3), γ = 1.806(3), 2Vmeas = 60(5)°, 2Vcalc = 62.1°; moderate dispersion, r < v; strong pleochroism, X (bluish-green) > Z (orange) > Y (yellow); orientation Y = b, X ∧ a = 48° in obtuse β. Analysis by electron microprobe (average of 28 analyses given in wt%) provided TiO2 0.12, Al 2O3 3.10, Fe2O3 41.95, MnO 5.97, MgO 0.08, CaO 0.23, ZnO 0.15, Na2O 3.03, P2O5 32.73, and H2O (calculated by stoichiometry) 10.31, total 97.67 wt%. The empirical formula, based on 24 O, is (Na0.85Ca0..02) ∑0.87 (Mn0.742+Fe0.12 2+Mg0.02Zn0.02Ti0.01) 4+∑0.90 (Fe4.473+Al 0.53)∑5.00 (P4.03O16)(OH) 6·2H2O. The crystal structure (R1 = 6.10%) shows gayite to be a member of the dufrénite group, along with dufrénite, natrodufrénite, matioliite, and burangaite. The structure is a framework consisting of Fe3+O6 octahedra, Mn2+O6octahedra, and PO4 tetrahedra with channels along the b axis containing Na atoms. The most unusual feature of the structure is an octahedral face-sharing Fe3+-Mn2+-Fe 3+ trimer.Fil: Kampf, Anthony R.. Natural History Museum Of Los Angeles County; Estados UnidosFil: 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; ArgentinaFil: González del Tánago, José. Universidad Complutense de Madrid; EspañaMineralogical Society of America2010-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/55346Kampf, Anthony R.; Colombo, Fernando; González del Tánago, José; Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina; Mineralogical Society of America; American Mineralogist; 95; 2-3; 2-2010; 386-3910003-004XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/msa/ammin/article/95/2-3/386-391/45108info:eu-repo/semantics/altIdentifier/doi/10.2138/am.2010.3299info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:29:59Zoai:ri.conicet.gov.ar:11336/55346instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:30:00.158CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
title Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
spellingShingle Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
Kampf, Anthony R.
Argentina
Córdoba
Dufrénite Group
Gayite
New Mineral
Pegmatite Phosphate
title_short Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
title_full Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
title_fullStr Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
title_full_unstemmed Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
title_sort Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
dc.creator.none.fl_str_mv Kampf, Anthony R.
Colombo, Fernando
González del Tánago, José
author Kampf, Anthony R.
author_facet Kampf, Anthony R.
Colombo, Fernando
González del Tánago, José
author_role author
author2 Colombo, Fernando
González del Tánago, José
author2_role author
author
dc.subject.none.fl_str_mv Argentina
Córdoba
Dufrénite Group
Gayite
New Mineral
Pegmatite Phosphate
topic Argentina
Córdoba
Dufrénite Group
Gayite
New Mineral
Pegmatite Phosphate
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Gayite, ideally NaMn2+Fe3+5 (PO 4)4(OH)6·2H2O, is a new member of the dufrénite group found at the Gigante granitic pegmatite, Punilla department, Córdoba province, Argentina. It is named for Hebe D. Gay (b. 1927), Professor Emeritus of Mineralogy of the National University of Córdoba (Argentina). The new mineral is monoclinic, space group C2/c, a = 25.975(3) Å, b = 5.1766(3) Å, c = 13.929(1) Å, β = 111.293(2)°, Z = 4. The strongest lines in the X-ray powder diffraction pattern are [d in Å, (I)]: 12.054 (33), 5.045 (60), 4.147 (37), 3.424 (71), 3.179 (100), 3.004 (33), 2.881 (42), 2.426 (36), 2.109 (39), 1.585 (50). It occurs associated with morinite, natrodufrénite, and quartz in cavities in massive apatite-(CaF), as clusters of tabular crystals up to 130 μm on edge dominated by {100}, with subordinate {201̄} and possibly also {110}, {111}, and {111̄}. Crystals display striations parallel to [010]. The mineral is greenish black with an olive green streak and vitreous luster. Thin tablets are transparent. Gayite is brittle, with perfect {100} cleavage and irregular fracture. Its Mohs hardness is 4 to 5. The measured density is 3.15(5) g/cm3, and the calculated density is 3.241 g/cm3. The mineral dissolves slowly in dilute HCl. Gayite is biaxial (+), α = 1.787(3), β = 1.792(3), γ = 1.806(3), 2Vmeas = 60(5)°, 2Vcalc = 62.1°; moderate dispersion, r < v; strong pleochroism, X (bluish-green) > Z (orange) > Y (yellow); orientation Y = b, X ∧ a = 48° in obtuse β. Analysis by electron microprobe (average of 28 analyses given in wt%) provided TiO2 0.12, Al 2O3 3.10, Fe2O3 41.95, MnO 5.97, MgO 0.08, CaO 0.23, ZnO 0.15, Na2O 3.03, P2O5 32.73, and H2O (calculated by stoichiometry) 10.31, total 97.67 wt%. The empirical formula, based on 24 O, is (Na0.85Ca0..02) ∑0.87 (Mn0.742+Fe0.12 2+Mg0.02Zn0.02Ti0.01) 4+∑0.90 (Fe4.473+Al 0.53)∑5.00 (P4.03O16)(OH) 6·2H2O. The crystal structure (R1 = 6.10%) shows gayite to be a member of the dufrénite group, along with dufrénite, natrodufrénite, matioliite, and burangaite. The structure is a framework consisting of Fe3+O6 octahedra, Mn2+O6octahedra, and PO4 tetrahedra with channels along the b axis containing Na atoms. The most unusual feature of the structure is an octahedral face-sharing Fe3+-Mn2+-Fe 3+ trimer.
Fil: Kampf, Anthony R.. Natural History Museum Of Los Angeles County; Estados Unidos
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
Fil: González del Tánago, José. Universidad Complutense de Madrid; España
description Gayite, ideally NaMn2+Fe3+5 (PO 4)4(OH)6·2H2O, is a new member of the dufrénite group found at the Gigante granitic pegmatite, Punilla department, Córdoba province, Argentina. It is named for Hebe D. Gay (b. 1927), Professor Emeritus of Mineralogy of the National University of Córdoba (Argentina). The new mineral is monoclinic, space group C2/c, a = 25.975(3) Å, b = 5.1766(3) Å, c = 13.929(1) Å, β = 111.293(2)°, Z = 4. The strongest lines in the X-ray powder diffraction pattern are [d in Å, (I)]: 12.054 (33), 5.045 (60), 4.147 (37), 3.424 (71), 3.179 (100), 3.004 (33), 2.881 (42), 2.426 (36), 2.109 (39), 1.585 (50). It occurs associated with morinite, natrodufrénite, and quartz in cavities in massive apatite-(CaF), as clusters of tabular crystals up to 130 μm on edge dominated by {100}, with subordinate {201̄} and possibly also {110}, {111}, and {111̄}. Crystals display striations parallel to [010]. The mineral is greenish black with an olive green streak and vitreous luster. Thin tablets are transparent. Gayite is brittle, with perfect {100} cleavage and irregular fracture. Its Mohs hardness is 4 to 5. The measured density is 3.15(5) g/cm3, and the calculated density is 3.241 g/cm3. The mineral dissolves slowly in dilute HCl. Gayite is biaxial (+), α = 1.787(3), β = 1.792(3), γ = 1.806(3), 2Vmeas = 60(5)°, 2Vcalc = 62.1°; moderate dispersion, r < v; strong pleochroism, X (bluish-green) > Z (orange) > Y (yellow); orientation Y = b, X ∧ a = 48° in obtuse β. Analysis by electron microprobe (average of 28 analyses given in wt%) provided TiO2 0.12, Al 2O3 3.10, Fe2O3 41.95, MnO 5.97, MgO 0.08, CaO 0.23, ZnO 0.15, Na2O 3.03, P2O5 32.73, and H2O (calculated by stoichiometry) 10.31, total 97.67 wt%. The empirical formula, based on 24 O, is (Na0.85Ca0..02) ∑0.87 (Mn0.742+Fe0.12 2+Mg0.02Zn0.02Ti0.01) 4+∑0.90 (Fe4.473+Al 0.53)∑5.00 (P4.03O16)(OH) 6·2H2O. The crystal structure (R1 = 6.10%) shows gayite to be a member of the dufrénite group, along with dufrénite, natrodufrénite, matioliite, and burangaite. The structure is a framework consisting of Fe3+O6 octahedra, Mn2+O6octahedra, and PO4 tetrahedra with channels along the b axis containing Na atoms. The most unusual feature of the structure is an octahedral face-sharing Fe3+-Mn2+-Fe 3+ trimer.
publishDate 2010
dc.date.none.fl_str_mv 2010-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/55346
Kampf, Anthony R.; Colombo, Fernando; González del Tánago, José; Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina; Mineralogical Society of America; American Mineralogist; 95; 2-3; 2-2010; 386-391
0003-004X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/55346
identifier_str_mv Kampf, Anthony R.; Colombo, Fernando; González del Tánago, José; Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina; Mineralogical Society of America; American Mineralogist; 95; 2-3; 2-2010; 386-391
0003-004X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/doi/10.2138/am.2010.3299
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Mineralogical Society of America
publisher.none.fl_str_mv Mineralogical Society of America
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