Asbestos

Asbestos is a group of naturally occurring, toxic, carcinogenic and fibrous silicate minerals. There are six types, all of which are composed of long and thin fibrous crystals, each... Wikipedia

• Category:  Silicate minerals
• Strunz classification:  09.ED.15
• Dana classification:  71.01.02d.03
• Crystal system:  Orthorhombic, monoclinic
• Formula mass:  277.11 g
• Color:  Green, red, yellow, white, gray, blue
• Crystal habit:  Amorphous, granular, massive
• Cleavage:  Prismatic
• Fracture:  Fibrous
• Mohs scale hardness:  2.5.6.0
• Luster:  Silky
• Streak:  White
• Specific gravity:  2.4–3.3
• Optical properties:  Biaxial
• Refractive index:  1.53–1.72
• Birefringence:  0.008
• 2V angle:  20° to 60°
• Dispersion:  Relatively weak
• Extinction:  Parallel or oblique
• Ultraviolet fluorescence:  Non-fluorescent
• Data source:  DuckDuckGo