Sborgite is a
sodium borate mineral with formula Na
5O6(OH)4·3H
2O. The formula can be written as the oxide formulation, Na
2O.5B
2O
3.10H
2O. Sometimes called sodium pentaborate pentahydrate it contains the
pentaborate anion, (B
5O
6(OH)
4)
−.
Sborgite is colorless 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, US.
[http://rruff.geo.arizona.edu/doclib/hom/sborgite.pdf Mineral Handbook]
See also
*
List of minerals
References
*
*
*
sborgitewebmineral.com
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Sodium minerals
Nesoborates
Monoclinic minerals
Minerals in space group 15