Calciodelrioite, Ca(VO3)(2)(H2O)(4), the Ca analogue of delrioite, Sr(VO3)(2)(H2O)(4)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F12%3A00107085" target="_blank" >RIV/00216224:14310/12:00107085 - isvavai.cz</a>

Výsledek na webu

<a href="http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.882.352&rep=rep1&type=pdf" target="_blank" >http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.882.352&rep=rep1&type=pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/minmag.2012.076.7.12" target="_blank" >10.1180/minmag.2012.076.7.12</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Calciodelrioite, Ca(VO3)(2)(H2O)(4), the Ca analogue of delrioite, Sr(VO3)(2)(H2O)(4)

Popis výsledku v původním jazyce

Calciodelrioite, ideally Ca(VO3)(2)(H2O)(4), is a new mineral (IMA 2012-031) from the uranium-vanadium deposits of the eastern Colorado Plateau in the USA. The type locality is the West Sunday mine, Slick Rock district, San Miguel County, Colorado. The new mineral occurs on fracture surfaces in corvusite- and montroseite-impregnated sandstone and forms as a result of the oxidative alteration of these phases. At the West Sunday mine, calciodelrioite is associated with celestine, gypsum, huemulite, metarossite, pascoite and rossite. The mineral occurs as transparent colourless needles, bundles of tan to brown needles and star bursts of nearly black broad blades composed of tightly intergrown needles. Crystals are elongate and striated parallel to [100], exhibiting the prismatic forms {001} and {011} and having terminations possibly composed of the forms {100} and {61 (1) over bar}. The mineral is transparent and has a white streak, subadamantine lustre, Mohs hardness of about 2 1/2, brittle tenacity, irregular to splintery fracture, one perfect cleavage on {001} and possibly one or more additional cleavages parallel to [100]. Calciodelrioite is soluble in water. The calculated density is 2.451 g cm(-3). It is optically biaxial (+) with alpha = 1.733(3), beta = 1.775(3), gamma = 1.825(3) (white light), 2V(meas) = 87.3(9)degrees and 2V(calc) = 87 degrees. The optical orientation is X = b; Z approximate to a. No pleochroism was observed. Electron-microprobe analyses of two calciodelrioite samples and type delrioite provided the empirical formulae (Ca0.88Sr0.07Na0.04K0.01)(Sigma 1.00)(V1.00O3)(2)(H2.01O)(4), (Ca0.76Sr0.21Na0.01)(Sigma 0.98)(V1.00O3)(2)(H2.01O)(4) and (Sr0.67Ca0.32)(Sigma 0.99)(V1.00O3)(2)(H2.00O)(4), respectively. Calciodelrioite is monoclinic, I2/a, with unit-cell parameters a = 14.6389(10), b = 6.9591(4), c = 17.052(2) angstrom, beta = 102.568(9)degrees, V = 1695.5(3) angstrom(3) and Z = 8. The seven strongest lines in the X-ray powder diffraction pattern [listed as d(obs) angstrom(I)(hkl)] are as follows: 6.450(100)(011); 4.350(16)(013); 3.489(18)(020); 3.215(17)(022); 3.027(50)(multiple); 2.560(28)((4) over bar 15,413); 1.786(18)(028). In the structure of calciodelrioite (refined to R-1 = 3.14% for 1216 F-o &gt; 4 sigma F), V5+O5 polyhedra link by sharing edges to form a zigzag divanadate [VO3] chain along a, similar to that in the structure of rossite. The chains are linked via bonds to Ca atoms, which also bond to H2O groups, yielding CaO3(H2O)(6) polyhedra. The Ca polyhedra form a chain along b. Each of the two symmetrically independent VO5 polyhedra has two short vanadyl bonds and three long equatorial bonds. Calciodelrioite and delrioite are isostructural and are the endmembers of the series Ca(VO3)(2)(H2O)(4)-Sr(VO3)(2)(H2O)(4). Calciodelrioite is dimorphous with rossite, which has a similar structure; however, the smaller 8-coordinate Ca site in rossite does not accommodate Sr.

Název v anglickém jazyce

Calciodelrioite, Ca(VO3)(2)(H2O)(4), the Ca analogue of delrioite, Sr(VO3)(2)(H2O)(4)

Popis výsledku anglicky

Calciodelrioite, ideally Ca(VO3)(2)(H2O)(4), is a new mineral (IMA 2012-031) from the uranium-vanadium deposits of the eastern Colorado Plateau in the USA. The type locality is the West Sunday mine, Slick Rock district, San Miguel County, Colorado. The new mineral occurs on fracture surfaces in corvusite- and montroseite-impregnated sandstone and forms as a result of the oxidative alteration of these phases. At the West Sunday mine, calciodelrioite is associated with celestine, gypsum, huemulite, metarossite, pascoite and rossite. The mineral occurs as transparent colourless needles, bundles of tan to brown needles and star bursts of nearly black broad blades composed of tightly intergrown needles. Crystals are elongate and striated parallel to [100], exhibiting the prismatic forms {001} and {011} and having terminations possibly composed of the forms {100} and {61 (1) over bar}. The mineral is transparent and has a white streak, subadamantine lustre, Mohs hardness of about 2 1/2, brittle tenacity, irregular to splintery fracture, one perfect cleavage on {001} and possibly one or more additional cleavages parallel to [100]. Calciodelrioite is soluble in water. The calculated density is 2.451 g cm(-3). It is optically biaxial (+) with alpha = 1.733(3), beta = 1.775(3), gamma = 1.825(3) (white light), 2V(meas) = 87.3(9)degrees and 2V(calc) = 87 degrees. The optical orientation is X = b; Z approximate to a. No pleochroism was observed. Electron-microprobe analyses of two calciodelrioite samples and type delrioite provided the empirical formulae (Ca0.88Sr0.07Na0.04K0.01)(Sigma 1.00)(V1.00O3)(2)(H2.01O)(4), (Ca0.76Sr0.21Na0.01)(Sigma 0.98)(V1.00O3)(2)(H2.01O)(4) and (Sr0.67Ca0.32)(Sigma 0.99)(V1.00O3)(2)(H2.00O)(4), respectively. Calciodelrioite is monoclinic, I2/a, with unit-cell parameters a = 14.6389(10), b = 6.9591(4), c = 17.052(2) angstrom, beta = 102.568(9)degrees, V = 1695.5(3) angstrom(3) and Z = 8. The seven strongest lines in the X-ray powder diffraction pattern [listed as d(obs) angstrom(I)(hkl)] are as follows: 6.450(100)(011); 4.350(16)(013); 3.489(18)(020); 3.215(17)(022); 3.027(50)(multiple); 2.560(28)((4) over bar 15,413); 1.786(18)(028). In the structure of calciodelrioite (refined to R-1 = 3.14% for 1216 F-o &gt; 4 sigma F), V5+O5 polyhedra link by sharing edges to form a zigzag divanadate [VO3] chain along a, similar to that in the structure of rossite. The chains are linked via bonds to Ca atoms, which also bond to H2O groups, yielding CaO3(H2O)(6) polyhedra. The Ca polyhedra form a chain along b. Each of the two symmetrically independent VO5 polyhedra has two short vanadyl bonds and three long equatorial bonds. Calciodelrioite and delrioite are isostructural and are the endmembers of the series Ca(VO3)(2)(H2O)(4)-Sr(VO3)(2)(H2O)(4). Calciodelrioite is dimorphous with rossite, which has a similar structure; however, the smaller 8-coordinate Ca site in rossite does not accommodate Sr.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

—

Svazek periodika

76

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

2803-2817

Kód UT WoS článku

000323908500012

EID výsledku v databázi Scopus

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