APPLICATIONS: | Mineral specimens. |
ASSOCIATED MINERALS: | Andalusite, lithiophilite and triphylite and other phosphates. |
CHEMICAL STRUCTURE: | Al2PO4(OH)3, Aluminum Phosphate Hydroxide. |
CLASS: | Phosphates. |
CLEAVAGE: | Good in two directions. |
COLOR: | Usually colorless, white or pale shades of yellow, blue, pink or rose. |
CRYSTRAL HABITS: | Microscopic tabular or platey crystals with an overall triangular aspect or larger equant complex crystals and found massive. |
CRYSTAL SYSTEM: | Monoclinic, 2/m. |
FIELD INDICATORS: | Crystal habit, color, associations, localities and cleavage. |
FRACTURE: | Conchoidal. |
GEOGRAPHY: | Vestana Mine, Nastum, Skane Sweden; Oruro, Bolivia; Rapid Creek, Yukon Territory, Canada; White Picacho district, Arizona; North Groton, New Hampshire; Black Hills region of South Dakota and the White Mountain, Mono County, California, USA. |
HARDNESS: | 4.5 - 5. |
LUSTER: | Vitreous. |
TRANSPARENCY: | Transparent to translucent. |
SPECIFIC GRAVITY: | 2.7. |
STREAK: | White. |
