Sborgite
Sborgite | |
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General | |
Category | Nesoborates |
Formula (repeating unit) | Na[B5O6(OH)4]·3H2O |
Strunz classification | 06.EA.05 |
Sborgite is a sodium borate mineral with formula Na[B5O6(OH)4]·3H2O. The formula can be written as the oxide formulation, Na2O.5B2O3.10H2O. Sometimes called sodium pentaborate pentahydrate it contains the pentaborate anion, (B5O6(OH)4)−.
Sborgite is colourless with monoclinic crystals. It was named for Umberto Sborgi, (1883 - 1955), Professor of Chemistry, University of Milan, Italy. Sborgite occurs in Tuscany, Italy and the Furnace Creek district, Death Valley, California, USA. [1]
See also
References
- ↑ http://rruff.geo.arizona.edu/doclib/hom/sborgite.pdf Mineral Handbook
- Curzio Cipriani (1957). "Un nuovo minerale fra i prodotti boriferi di Larderello". Atti Rend. Accad. Lincei 22: 519–525.
- S. Menchetti and C. Sabelli (1978). "The crystal structure of NaB5O6(OH)4". Acta Crystallographica Section B B34 (1): 45–49. doi:10.1107/S0567740878002289.
- S. Merlino (1972). "The crystal structure of sborgite, NaB5O6(OH)4.3H2O". Acta Crystallographica Section B B28 (12): 3559–3567. doi:10.1107/S0567740872008349.
- sborgite
- webmineral.com
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