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Macdonaldite with Sanbornite

#PD42221

Macdonaldite with Sanbornite

#PD42221
Availability
Sold
Size
3 x 1.5 x 1.5 cm - Thumbnail 
Formula
BaCa4Si16O36(OH)2·10H2O (RRUFF)
Locality
Big Creek, Fresno Co., California, United States

An excellent specimen with radial sprays of colorless to white acicular crystals to 1-2mm. The crystals are free-standing. Macdonaldite is an alteration product of Sanbornite but is rare. This is one of the better specimens in this Special Edition.

Type Locality

Macdonaldite

Formula
BaCa4Si16O36(OH)2·10H2
Crystal System
Orthorhombic 
Crystal Habit
Acicular 
Cleavage
Perfect, Good, Indistinct 
Luster
Vitreous - Silky 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
3.5-4 

Data courtesy of Webmineral.

Collection
Phillips Collection
Special Info
Type Locality

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