Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup
Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)(3)(OH)(3)O, is a new mineral of the tourmaline supergroup. It is found in metaquartzites of the Pereval marble quarry (Sludyanka, Lake Baikal, Russia) in association with quartz, Cr-V-bearing tremolite and mica, diopside-kosmochlor-natalyite, Cr-bearing...
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MINERALOGICAL SOC AMER
2014
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Online Access: | http://hdl.handle.net/11573/553506 https://doi.org/10.2138/am.2014.4605 |
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ftunivromairis:oai:iris.uniroma1.it:11573/553506 2024-04-14T08:14:17+00:00 Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup BOSI, Ferdinando H. Skogby L. Reznitskii U. Halenius Bosi, Ferdinando H., Skogby L., Reznitskii U., Halenius 2014 STAMPA http://hdl.handle.net/11573/553506 https://doi.org/10.2138/am.2014.4605 eng eng MINERALOGICAL SOC AMER info:eu-repo/semantics/altIdentifier/wos/WOS:000329416700027 volume:99 issue:1 firstpage:218 lastpage:224 numberofpages:7 journal:AMERICAN MINERALOGIST http://hdl.handle.net/11573/553506 doi:10.2138/am.2014.4605 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84892161068 infrared spectroscopy crystal-structure refinement new mineral specie tourmaline vanadio-oxy-dravite electron microprobe optical absorption spectroscopy info:eu-repo/semantics/article 2014 ftunivromairis https://doi.org/10.2138/am.2014.4605 2024-03-21T18:53:02Z Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)(3)(OH)(3)O, is a new mineral of the tourmaline supergroup. It is found in metaquartzites of the Pereval marble quarry (Sludyanka, Lake Baikal, Russia) in association with quartz, Cr-V-bearing tremolite and mica, diopside-kosmochlor-natalyite, Cr-bearing goldmanite, escolaite-karelianite, dravite-oxy-vanadium-dravite, V-bearing titanite and rutile, ilmenite, oxyvanite-berdesinskiite, shreyerite, plagioclase, scapolite, zircon, pyrite, and an unnamed oxide of V, Cr, Ti, U, and Nb. Crystals are green, transparent with a vitreous luster, pale green streak, and conchoidal fracture. Vanadio-oxy-dravite has a Mohs hardness of approximately 7 1/2, and a calculated density of 3.14 g/cm(3). In plane-polarized light, vanadio-oxy-dravite is pleochroic (O = yellow green and E = pale olive green) and uniaxial negative: omega = 1.693(5), epsilon = 1.673(5). Vanadio-oxy-dravite is rhombohedral, space group R3m, with the unit-cell parameters a = 16.0273(3), c = 7.2833(1) angstrom, V = 1620.24(5) angstrom(3), Z = 3. Crystal-chemical analysis resulted in the empirical structural formula: (X)(Na0.70Ca0.23 square K-0.05(0.02))(Sigma 1.00) (Y)(V1.393+Mg1.16Al0.35Fe0.043+Ti0.044+Fe0.022+)(Sigma 3.00) (Z)(Al3.74Mg1.28V0.783+Cr0.203+)(Sigma 6.00) (T)(Si6.00O18) (B)(BO3)(3) (v)(OH)(3) (W)[O-0.74(OH)(0.26)](Sigma 1.00). The crystal structure of vanadio-oxy-dravite was refined to an R1 index of 1.70% using 1800 unique reflections collected with MoK alpha X-radiation. Ideally, vanadio-oxy-dravite is related to oxy-dravite and oxy-vanadium-dravite by the homovalent substitution V3+<-> Al3+. Tourmaline with chemical compositions classified as vanadio-oxy-dravite can be either Al dominant or V dominant as a result of the compositional boundaries along the solid solution between Al and V3+ that are determined at (Y+Z)(V1.5Al5.5), corresponding to Na-Y(V1.5Al1.5)(Z)(Al4Mg2)Si6O18(BO3)(3)(OH)(3)O, and (Y+Z)(V5Al2), corresponding to Na-Y(V-3)(Z)(V2Al2Mg2)Si6O18(BO3)(3)(OH)(3)O. Article in Journal/Newspaper karelia* Sapienza Università di Roma: CINECA IRIS American Mineralogist 99 1 218 224 |
institution |
Open Polar |
collection |
Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
topic |
infrared spectroscopy crystal-structure refinement new mineral specie tourmaline vanadio-oxy-dravite electron microprobe optical absorption spectroscopy |
spellingShingle |
infrared spectroscopy crystal-structure refinement new mineral specie tourmaline vanadio-oxy-dravite electron microprobe optical absorption spectroscopy BOSI, Ferdinando H. Skogby L. Reznitskii U. Halenius Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup |
topic_facet |
infrared spectroscopy crystal-structure refinement new mineral specie tourmaline vanadio-oxy-dravite electron microprobe optical absorption spectroscopy |
description |
Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)(3)(OH)(3)O, is a new mineral of the tourmaline supergroup. It is found in metaquartzites of the Pereval marble quarry (Sludyanka, Lake Baikal, Russia) in association with quartz, Cr-V-bearing tremolite and mica, diopside-kosmochlor-natalyite, Cr-bearing goldmanite, escolaite-karelianite, dravite-oxy-vanadium-dravite, V-bearing titanite and rutile, ilmenite, oxyvanite-berdesinskiite, shreyerite, plagioclase, scapolite, zircon, pyrite, and an unnamed oxide of V, Cr, Ti, U, and Nb. Crystals are green, transparent with a vitreous luster, pale green streak, and conchoidal fracture. Vanadio-oxy-dravite has a Mohs hardness of approximately 7 1/2, and a calculated density of 3.14 g/cm(3). In plane-polarized light, vanadio-oxy-dravite is pleochroic (O = yellow green and E = pale olive green) and uniaxial negative: omega = 1.693(5), epsilon = 1.673(5). Vanadio-oxy-dravite is rhombohedral, space group R3m, with the unit-cell parameters a = 16.0273(3), c = 7.2833(1) angstrom, V = 1620.24(5) angstrom(3), Z = 3. Crystal-chemical analysis resulted in the empirical structural formula: (X)(Na0.70Ca0.23 square K-0.05(0.02))(Sigma 1.00) (Y)(V1.393+Mg1.16Al0.35Fe0.043+Ti0.044+Fe0.022+)(Sigma 3.00) (Z)(Al3.74Mg1.28V0.783+Cr0.203+)(Sigma 6.00) (T)(Si6.00O18) (B)(BO3)(3) (v)(OH)(3) (W)[O-0.74(OH)(0.26)](Sigma 1.00). The crystal structure of vanadio-oxy-dravite was refined to an R1 index of 1.70% using 1800 unique reflections collected with MoK alpha X-radiation. Ideally, vanadio-oxy-dravite is related to oxy-dravite and oxy-vanadium-dravite by the homovalent substitution V3+<-> Al3+. Tourmaline with chemical compositions classified as vanadio-oxy-dravite can be either Al dominant or V dominant as a result of the compositional boundaries along the solid solution between Al and V3+ that are determined at (Y+Z)(V1.5Al5.5), corresponding to Na-Y(V1.5Al1.5)(Z)(Al4Mg2)Si6O18(BO3)(3)(OH)(3)O, and (Y+Z)(V5Al2), corresponding to Na-Y(V-3)(Z)(V2Al2Mg2)Si6O18(BO3)(3)(OH)(3)O. |
author2 |
Bosi, Ferdinando H., Skogby L., Reznitskii U., Halenius |
format |
Article in Journal/Newspaper |
author |
BOSI, Ferdinando H. Skogby L. Reznitskii U. Halenius |
author_facet |
BOSI, Ferdinando H. Skogby L. Reznitskii U. Halenius |
author_sort |
BOSI, Ferdinando |
title |
Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup |
title_short |
Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup |
title_full |
Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup |
title_fullStr |
Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup |
title_full_unstemmed |
Vanadio-oxy-dravite, NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup |
title_sort |
vanadio-oxy-dravite, nav3(al4mg2)(si6o18)(bo3)3(oh)3o, a new mineral species of the tourmaline supergroup |
publisher |
MINERALOGICAL SOC AMER |
publishDate |
2014 |
url |
http://hdl.handle.net/11573/553506 https://doi.org/10.2138/am.2014.4605 |
genre |
karelia* |
genre_facet |
karelia* |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000329416700027 volume:99 issue:1 firstpage:218 lastpage:224 numberofpages:7 journal:AMERICAN MINERALOGIST http://hdl.handle.net/11573/553506 doi:10.2138/am.2014.4605 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84892161068 |
op_doi |
https://doi.org/10.2138/am.2014.4605 |
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