Billietite
| Billietite | |
|---|---|
|
Becquerelite (yellow) and billietite (orange) | |
| General | |
| Category | Oxide minerals |
| Formula (repeating unit) | Ba(UO2)6O4(OH)6•8H2O |
| Strunz classification | 04.GB.10 |
| Dana classification | 5.7.1.3 |
| Identification | |
| Color | Yellow to golden-yellow, amber-yellow, orange-yellow |
| Crystal system | Orthorhombic |
| Cleavage | Perfect on {001}, imperfect on {110} and {010} |
| Tenacity | Brittle |
| Luster | Adamantine |
| Diaphaneity | Transparent, translucent |
| Density | 5.28 - 5.36 g/cm3 |
| References | [1] |
Billietite is an uncommon mineral of Uranium that contains Barium. It has the chemical formula: Ba(UO2)6O4(OH)6•8H2O. It usually occurs as clear yellow orthorhombic crystals.[2] Billietite is named after Valere Louis Billiet (1903–1944), Belgian crystallographer at the University of Ghent, Ghent, Belgium.
References
- ↑ Mindat.org - Billietite
- ↑ M. Katherine Pagoaga, Daniel E, Appleman, & James M. Stewart "Crystal structures and crystal chemistry of the uranyl oxide hydrates becquerelite, billietite, and protasite" American Mineralogist, Volume 72, pages 1230-1238, 1987