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Specifications |
|
Mineral Vermiculite |
• Mineral Mica's family, basically consist of silicates of aluminium, magnesium and iron. |
Mineral Vermiculite |
• Expanded vermiculite with thermic treatment with temperatures above 700 °C the mineral expands increasing volume of 15 to 20 times |
Vermiculite |
• General- |
Identification Colour |
• Bronze- |
Streak |
• Pale yellow |
Refractive index |
• Translucent |
Lustre |
• Vitreous |
Mohs Scale hardness |
• 1.5- |
Specific gravity |
• 2.4- |
Crystal system |
• Monoclinic |
Crystal habit |
• Clay, scaly, aggregate |
Cleavage |
• Perfect |
Fracture |
• Uneven |
Pleochroism |
• None |
Chemical formula |
• (MgFe,Al)3(Al,Si)4O10(OH)2·4H2O |
Properties |
• The bulk densities of expanded vermiculite ranging between 60 and 140 Kglm 3 as grain size |
Stability |
• Is insensitive to atmospheric agents |
Insulation Data |
|
Thermal insulation |
• The expanded vermiculite insulations maintains its capacity from 200 "C and 1200 "C. Its thermal conductivity is of 0.053m Kcallhr. "C for an average temperature of 20 "C.Su calorffica capacity is very low (0.2). |
Fire resistance |
• Melting point 1370 " |
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