Technical properties of Muscovite Mica

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Muscovite Mica Properties

Properties	Units
BS 3483	100g Mica
Effect by common acids	Slight
Hardness (moh's scale)	2.5
Index of refraction	1.58
Softening Point	2800^oF
Oil absorbtion	60-90 g/oil
Specific gravity	2.82
Water soluble	Not more
BS 1765	Then 0.5%
pH value (BS 3483)	7.7
Phericity factor	0.01
pH for distilled water	5.2
Character	White, often sheds tiny flakes
Lustre	Pearly to vitreous
Appearance	Transparent to translucent

Properties	Units	Muscovite
Thermal conductivity perpendicular to cleavage plane	Gm.cal/sec/cm2/^oC/cm BTU.hr/ft2/0f/ft	About 0.0013, About 0.13
Thermal conductivity parallel to cleavage plane	Gm.cal/sec/cm2/^oC/cm BTU.hr/ft2/0f/ft	---
Water of Constitution %	---	4.5
Moisture Absorption	---	Very low
Volume Resistivity	25^o(77^oF) ohm cm	40 x 10₁₃-2 x 10₁₇
Acid Reaction	---	Affected by hydrofluoric acid
Insulation Resistance	x10₁₃ohm/cm	4-20000
Calcining temp	^oC	700-800
Max. operating temp	^oC	500-600
Tensile strength	MN/m2	175
Shear strength	MN/m2	175
Compression Strength	MN/m2	220-270
Modulus of Elasticity	Kgfcm2 x 10_-3 Ibf/in2 x 10_-3	1400 - 2100, 20-30
Loss tangent	x10_-4	1-4
Permittivity at 15^oC(60^oF)	---	6-7