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Hughesita
CaracterÃsticas generales
Fórmula: Na3Al(V10O28)•22H2O
Sistema de cristalización: TriclÃnico
Lustre: Subadamantino
Color: Orange to golden orange
Dureza: 1
Rareza: muy raro
Formación y ambiente
Type material is deposited in the Smithsonian Institute, specimen number NMNH 174253
Hughesite forms through the oxidation of Corvusite,
Propiedades fisicas
Hábito: Blocky, spear-shaped, and platy
Lustre: Subadamantino
Transparencia: Transparente, Translúcido
Comentarios: Decavanadate salt
Named in honor of Dr. John Michael Hughes (b. 1952), formerly Professor of Mineralogy at Miami University and now Professor of Mineralogy and former Provost at the University of Vermont, for his long and outstanding career in mineralogy, including his extensive work on the pascoite family of minerals and vanadium bronzes.
Color: Orange to golden orange
Raya: Amarilla
Dureza (Mohs): 1
Exfoliación::
- Primera exfoliación: Perceptible/Buena en [001]
- Segunda exfoliación: Perceptible/Buena
- Tercera exfoliación: Perceptible/Buena
Fractura: Irregular - Uneven
CristalografÃa
Sistema cristalino:TriclÃnico
Clase (H-M): 1m (1*) - Pinacoidal
Grupo espacial: P1*
Parámetros de la celda: a=8,668Å b=10,295Å c=12,908Å
Estructura del cristal: α=105,826º β=97,899º γ=103,385º
Volumen de unidad de celda: V 1053Ã…
Z: 1
Difracción de Rayos X:D(hkl) | Intensidad |
---|---|
12,13 | 100 |
8,237 | 36 |
8,984 | 28 |
9,502 | 25 |
7,615 | 9 |
6,428 | 9 |
2,761 | 8 |
3,352 | 6 |
Propiedades ópticas
Tipo: Biaxial (-)
Valores RI: nα= 1,698; nβ= 1,74; nγ= 1,77
2V: medida: 84º
Dispersión: strong dispersion, with r > v.
Pleocroismo: Pleochroic with X = Y
X: Ight golden yellow,
Y: Ight golden yellow,
Z: Dark golden yellow
Propiedades quÃmicas
Fórmula: Na3Al(V10O28)•22H2O
Elementos quÃmicos: Na, Al, V, O, H, O
Composición quÃmica: Al: 1,86%, H: 3,06%, V: 35,14%, Na: 4,76%, O: 55,18%,
Yacimientos y localidades de interés
Localidades
- Sunday mine, Slick Rock district, San Miguel County, Colorado, USA - Localidad tipo.
BibliografÃa y más información
- Canadian Mineralogist, 49:1253-1265
![Ezoic](https://go.ezodn.com/utilcave_com/img/ezoic.png)
Barra lateral
Clasificación
Estado IMA: Approved 2010Nickel-Strunz : 04.HC.05
- 4: Óxidos
- 04.H: V[5+,6+] Vanadatos
- 04.HC: [6]-Sorovanadatos
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