Sborgite

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Sborgite
General
Category Nesoborates
Formula
(repeating unit)
Na[B5O6(OH)4]·3H2O
Strunz classification 6.EA.05
Crystal system Monoclinic
Crystal class Prismatic (2/m)
(same H-M symbol)
Space group C2/c
Identification
Color colorless
Luster vitreous
Diaphaneity transparent

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 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.[1]

See also[edit]

References[edit]