About: ZACCARINIITE, RhNiAs, A NEW PLATINUM-GROUP MINERAL SPECIES FROM LOMA PEGUERA, DOMINICAN REPUBLIC

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Zaccariniite, RhNiAs, is a new platinum-group mineral discovered in the Loma Peguera ophiolitic chromitite, Dominican Republic. The new mineral forms anhedral grains (1-20 μm in size) and occurs intergrown with garutiite, in association with hexaferrum, Ru-Os-Ir-Fe alloys, Ru-Os-Ir-Fe oxygenated compounds, and chromite. Zaccariniite is opaque, has a metallic lustre and a grey streak. The mineral is brittle, with no cleavage. Values of VHN5 (10 indentations on different grains of synthetic RhNiAs) fall between 166 and 286 kg/mm2, with a mean value of 218 kg/mm2, corresponding to a Mohs hardness of approximately 3½-4. Under plane-polarized reflected light, the mineral is white with brownish to pinkish tints, has moderate to strong bireflectance, a strong white to pinkish brownish white pleochroism, and strong anisotropy, with rotation tints from orange to blue-green; it exhibits no internal reflections. Reflectance values of zaccariniite in air (R1, R2 in %) are: 49.4, 49.4 at 470 nm, 52.4, 53.2 at 546 nm, 54.2, 53.2 at 589 nm, and 56.6, 53.3 at 650 nm. Three electron-microprobe analyses of natural zaccariniite gave an average composition of: Rh 41.77, Os 0.51, Ir 0.64, Ru 0.46, Pd 0.34, Ni 23.75, Fe 0.53, As 27.84, S 0.10, for a total of 96.09 wt.%, corresponding to the empirical formula (Rh1.01Os0.01Ir0.01Ru0.01Pd0.01)∑1.05(Ni1.00Fe0.02)∑1.02(As0.92S0.01)∑0.93 based on three atoms. The average result of twenty-eight analyses of synthetic zaccariniite is: Rh 44.57, Ni 24.50, and As 31.82 total 100.88 wt.%, corresponding to Rh1.02Ni0.98As1.00. The mineral is tetragonal, belongs to space group P4/nmm with lattice parameters a = 3.5498(1), c = 6.1573(2) Å, V = 77.59(1) Å3, Z = 2, and crystallizes with the Cu2Sb structure type. The new Rh-Ni arsenide is named after the Federica Zaccarini in recognition of her important contribution to the mineralogy of platinum-group elements. Zaccariniite, RhNiAs, is a new platinum-group mineral discovered in the Loma Peguera ophiolitic chromitite, Dominican Republic. The new mineral forms anhedral grains (1-20 μm in size) and occurs intergrown with garutiite, in association with hexaferrum, Ru-Os-Ir-Fe alloys, Ru-Os-Ir-Fe oxygenated compounds, and chromite. Zaccariniite is opaque, has a metallic lustre and a grey streak. The mineral is brittle, with no cleavage. Values of VHN5 (10 indentations on different grains of synthetic RhNiAs) fall between 166 and 286 kg/mm2, with a mean value of 218 kg/mm2, corresponding to a Mohs hardness of approximately 3½-4. Under plane-polarized reflected light, the mineral is white with brownish to pinkish tints, has moderate to strong bireflectance, a strong white to pinkish brownish white pleochroism, and strong anisotropy, with rotation tints from orange to blue-green; it exhibits no internal reflections. Reflectance values of zaccariniite in air (R1, R2 in %) are: 49.4, 49.4 at 470 nm, 52.4, 53.2 at 546 nm, 54.2, 53.2 at 589 nm, and 56.6, 53.3 at 650 nm. Three electron-microprobe analyses of natural zaccariniite gave an average composition of: Rh 41.77, Os 0.51, Ir 0.64, Ru 0.46, Pd 0.34, Ni 23.75, Fe 0.53, As 27.84, S 0.10, for a total of 96.09 wt.%, corresponding to the empirical formula (Rh1.01Os0.01Ir0.01Ru0.01Pd0.01)∑1.05(Ni1.00Fe0.02)∑1.02(As0.92S0.01)∑0.93 based on three atoms. The average result of twenty-eight analyses of synthetic zaccariniite is: Rh 44.57, Ni 24.50, and As 31.82 total 100.88 wt.%, corresponding to Rh1.02Ni0.98As1.00. The mineral is tetragonal, belongs to space group P4/nmm with lattice parameters a = 3.5498(1), c = 6.1573(2) Å, V = 77.59(1) Å3, Z = 2, and crystallizes with the Cu2Sb structure type. The new Rh-Ni arsenide is named after the Federica Zaccarini in recognition of her important contribution to the mineralogy of platinum-group elements. (en)
Title	ZACCARINIITE, RhNiAs, A NEW PLATINUM-GROUP MINERAL SPECIES FROM LOMA PEGUERA, DOMINICAN REPUBLIC ZACCARINIITE, RhNiAs, A NEW PLATINUM-GROUP MINERAL SPECIES FROM LOMA PEGUERA, DOMINICAN REPUBLIC (en)
skos:prefLabel	ZACCARINIITE, RhNiAs, A NEW PLATINUM-GROUP MINERAL SPECIES FROM LOMA PEGUERA, DOMINICAN REPUBLIC ZACCARINIITE, RhNiAs, A NEW PLATINUM-GROUP MINERAL SPECIES FROM LOMA PEGUERA, DOMINICAN REPUBLIC (en)
skos:notation	RIV/00025798:_____/12:00000274!RIV13-MSM-00025798
http://linked.open...avai/predkladatel	Česká geologická služba
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GPP210/11/P744)
http://linked.open...iv/cisloPeriodika	5
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Vymazalová, Anna Laufek, František Drábek, Milan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Česká geologická služba
http://linked.open...dnocenehoVysledku	181326
http://linked.open...ai/riv/idVysledku	RIV/00025798:_____/12:00000274
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	zaccariniite, platinum-group mineral, Rh-Ni arsenide, electron-microprobe data, reflectance data, synthetic RhNiAs, X-ray-diffraction data, Cu2Sb, crystal structure, Loma Peguera, Dominican Republic (en)
http://linked.open.../riv/klicoveSlovo	electron-microprobe data X-ray-diffraction data platinum-group mineral reflectance data crystal structure Dominican Republic Cu2Sb Loma Peguera Rh-Ni arsenide synthetic RhNiAs zaccariniite
http://linked.open...odStatuVydavatele	CA - Kanada
http://linked.open...ontrolniKodProRIV	[ED26FC125BC8]
http://linked.open...i/riv/nazevZdroje	Canadian Mineralogist
http://linked.open...in/vavai/riv/obor	DB
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	10 (xsd:int)
http://linked.open...vavai/riv/projekt	Selected platinum-group minerals and their experimental approach
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	50
http://linked.open...iv/tvurceVysledku	Laufek, František Vymazalová, Anna Bermejo, Raul Drábek, Milan Thalhammer, Oscar Baker, Ronald Garuti, Giorgio Longo, Francisco Proenza, Joa Stanley, Chris
http://linked.open...ain/vavai/riv/wos	000314175900012
issn	0008-4476
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.3749/canmin.50.5.1321
is http://linked.open...avai/riv/vysledek of	ZACCARINIITE, RhNiAs, A NEW PLATINUM-GROUP MINERAL SPECIES FROM LOMA PEGUERA, DOMINICAN REPUBLIC

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