Smamite, Ca2Sb(OH)(4)[H(AsO4)(2)]center dot 6H(2)O, a new mineral and a possible sink for Sb during weathering of fahlore

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00116942" target="_blank" >RIV/00216224:14310/20:00116942 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.2138/am-2020-7133" target="_blank" >https://doi.org/10.2138/am-2020-7133</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2138/am-2020-7133" target="_blank" >10.2138/am-2020-7133</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Smamite, Ca2Sb(OH)(4)[H(AsO4)(2)]center dot 6H(2)O, a new mineral and a possible sink for Sb during weathering of fahlore

Popis výsledku v původním jazyce

Smamite, Ca2Sb(OH)(4)[H(AsO4)(2)]center dot 6H(2)O, is a new mineral species from the Giftgrube mine, Rauenthal, Sainte-Marie-Aux-Mines ore-district, Haut-Rhin department, France. It is a supergene mineral found in quartz-carbonate gangue with disseminated to massive tennantite-tetrahedrite series minerals, native arsenic, Ni-Co arsenides, and supergene minerals picropharmacolite, fluckite, and pharmacolite. Smamite occurs as lenticular crystals growing in aggregates up to 0.5 mm across. The new mineral is whitish to colorless, transparent with vitreous luster and white streak; non-fluorescent under UV radiation. The Mohs hardness is3(1/2); the tenacity is brittle, the fracture is curved, and there is no apparent cleavage. The measured density is 2.72(3) g/cm(3); the calculated density is 2.709 g/cm(3) for the ideal formula. The mineral is insoluble in H2O and quickly soluble in dilute (10%) HCl at room temperature. Optically, smamite is biaxial (-), alpha = 1.556(1), beta = 1.581(1), gamma = 1.588(1) (white light). The 2V (meas) = 54(1)degrees; 2V (calc) = 55.1 degrees. The dispersion is weak, r &gt; gamma. Smamite is non-pleochroic. Electron microprobe analyses provided the empirical formula Ca-2 center dot 03Sb(0.97)(OH)(4)[H-1.10(As1.99Si0.01O4)(2)]center dot 6H2O. Smamite is triclinic, P (1) over bar, alpha = 5.8207(4), b = 8.0959(6), c = 8.21296(6) angstrom, alpha = 95.8343(7)degrees, beta = 110.762(8)degrees, gamma = 104.012(7)degrees, V = 402.57(5) angstrom 3, and Z = 1. The structure (Robs = 0.027 for 1518 I&gt;3sI reflections) is based upon {Ca-2(H2O)(6)Sb(OH)(4)[H(AsO4)(2)]} infinite chains consisting of edge-sharing dimers of Ca(H2O)(3)O-2(OH)(2) polyhedra that share edges with Sb(OH)(4)O-2 octahedra; adjacent chains are linked by H-bonds, including one strong, symmetrical H-bond with an O-H bond-length of similar to 1.23 angstrom. The name smamite is based on the acronym of the Sainte-Marie-aux-Mines district.

Název v anglickém jazyce

Smamite, Ca2Sb(OH)(4)[H(AsO4)(2)]center dot 6H(2)O, a new mineral and a possible sink for Sb during weathering of fahlore

Popis výsledku anglicky

Smamite, Ca2Sb(OH)(4)[H(AsO4)(2)]center dot 6H(2)O, is a new mineral species from the Giftgrube mine, Rauenthal, Sainte-Marie-Aux-Mines ore-district, Haut-Rhin department, France. It is a supergene mineral found in quartz-carbonate gangue with disseminated to massive tennantite-tetrahedrite series minerals, native arsenic, Ni-Co arsenides, and supergene minerals picropharmacolite, fluckite, and pharmacolite. Smamite occurs as lenticular crystals growing in aggregates up to 0.5 mm across. The new mineral is whitish to colorless, transparent with vitreous luster and white streak; non-fluorescent under UV radiation. The Mohs hardness is3(1/2); the tenacity is brittle, the fracture is curved, and there is no apparent cleavage. The measured density is 2.72(3) g/cm(3); the calculated density is 2.709 g/cm(3) for the ideal formula. The mineral is insoluble in H2O and quickly soluble in dilute (10%) HCl at room temperature. Optically, smamite is biaxial (-), alpha = 1.556(1), beta = 1.581(1), gamma = 1.588(1) (white light). The 2V (meas) = 54(1)degrees; 2V (calc) = 55.1 degrees. The dispersion is weak, r &gt; gamma. Smamite is non-pleochroic. Electron microprobe analyses provided the empirical formula Ca-2 center dot 03Sb(0.97)(OH)(4)[H-1.10(As1.99Si0.01O4)(2)]center dot 6H2O. Smamite is triclinic, P (1) over bar, alpha = 5.8207(4), b = 8.0959(6), c = 8.21296(6) angstrom, alpha = 95.8343(7)degrees, beta = 110.762(8)degrees, gamma = 104.012(7)degrees, V = 402.57(5) angstrom 3, and Z = 1. The structure (Robs = 0.027 for 1518 I&gt;3sI reflections) is based upon {Ca-2(H2O)(6)Sb(OH)(4)[H(AsO4)(2)]} infinite chains consisting of edge-sharing dimers of Ca(H2O)(3)O-2(OH)(2) polyhedra that share edges with Sb(OH)(4)O-2 octahedra; adjacent chains are linked by H-bonds, including one strong, symmetrical H-bond with an O-H bond-length of similar to 1.23 angstrom. The name smamite is based on the acronym of the Sainte-Marie-aux-Mines district.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

American Mineralogist

ISSN

0003-004X

e-ISSN

1945-3027

Svazek periodika

105

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

555-560

Kód UT WoS článku

000523599300010

EID výsledku v databázi Scopus

2-s2.0-85083654690