Baryte
(Reguidit frae Barite)
Baryte, or barite, (BaSO4) is a meeneral consistin o barium sulfate.[2] The baryte group consists o baryte, celestine, anglesite an anhydrite. Baryte itsel is generally white or colourless, an is the main soorce o barium. Baryte an celestine furm a solid solution (Ba,Sr)SO4.[1]
| Baryte (barite) | |
|---|---|
 Baryte crystals frae Cerro Huarihuyn, Mirafneelores, Huamalíes, Huánuco, Peru (size 56 x 53 mm, 74 g) | |
| General | |
| Category | Sulfate meeneral, barite group |
| Formula (repeatin unit) | BaSO4 |
| Strunz clessification | 07.AD.35 |
| Dana clessification | 28.03.01.01 |
| Creestal seestem | Orthorhombic |
| Space group | Orthorhombic (2/m 2/m 2/m) dipyramidal |
| Unit cell | a = 8.884(2) Å, b = 5.457(3) Å, c = 7.157(2) Å; A = 4 |
| Identification | |
| Colour | Colourless, white, licht shades o blae, yellae, grey, broun |
| Creestal habit | Tabular parallel tae base, fibrous, nodular tae massive |
| Cleavage | Perfect cleavage parallel tae base an prism faces: {001} Perfect, {210} Perfect, {010} Imperfect |
| Fractur | Irregular/uneven |
| Tenacity | Brickle |
| Mohs scale haurdness | 3-3.5 |
| Skinkle | Vitreous, pearly |
| Streak | White |
| Diaphaneity | skyre tae opaque |
| Speceefic gravity | 4.3–5 |
| Density | 4.48 g/cm3[1] |
| Optical properties | biaxial positive |
| Refractive index | nα = 1.634–1.637 nβ = 1.636–1.638 nγ = 1.646–1.648 |
| Birefringence | 0.012 |
| Fusibility | 4, yellaeish green barium flame |
| Diagnostic featurs | white colour, heich specific gravity, characteristic cleavage an crystals |
| Solubility | law |
| References | [2][3][4][5] |
References
eedit- ↑ a b Hanor, J. (2000). "Barite-celestine geochemistry and environments of formation". Reviews in Mineralogy. Washington, DC: Mineralogical Society of America. 40: 193–275. ISBN 0-939950-52-9.
- ↑ a b Dana, James Dwight; Ford, William Ebenezer (1915). Dana's Manual of Mineralogy for the Student of Elementary Mineralogy, the Mining Engineer, the Geologist, the Prospector, the Collector, Etc (13 ed.). John Wiley & Sons, Inc. pp. 299–300.
- ↑ Barite at Mindat
- ↑ Webmineral data for barite
- ↑ Baryte, Handbook of Mineralogy