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Dominant species
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Ulexite
Chemical
Formula
NaCaB5O6(OH)6?5(H2O)
Species
Borates
Crystal
System
Triclinic
Mohs
Scale
2
Specific
Gravity
1.95-1.96
Color
Colorless to white
Streak
White
Luster
Vitreous, Silky
Refractive
Index
n = 1.491 - 1.496 n = 1.504 - 1.506 n = 1.519 - 1.520
Diaphaneity
Transparent
Cleavage
PerfectPerfect on ; on good; on poor.
Fracture
Irregular/Uneven
Crystal Habit:Acicular to fibrous
Geological Setting:Arid regions. In salt playas and desiccated saline lakes.
Ulexite3356
Ulexite3356
Ulexite3355
Ulexite3355
Ulexite3351
Ulexite3351
Ulexite3350
Ulexite3350
Ulexite3347
Ulexite3347
Ulexite3344
Ulexite3344
Ulexite3341
Ulexite3341
Ulexite3333
Ulexite3333
Ulexite3329
Ulexite3329
Ulexite3326
Ulexite3326
Ulexite3321
Ulexite3321
Ulexite3317
Ulexite3317

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