Zirconium Silicate
Chemical and Physical Properties:
Color (Powder): White
Crystal: Transparent
Crystal Parameters (Tetragonal): a = 6.60Ά, c = 5.88Ά
Density: 4.60 gm/cc
Dielectric Constant: 12.7
Entropy: 20.1 Kg Cal/Mole @ 298.16 K
Hardness (Mohs): 7.5
Melting Point: 1538 oC - 1677 oC (decomposes)
Molecular Weight: 183.1
Reflectance: Infrared: 60 - 75%
Ultraviolet: 80 - 85%
Refractive Index: 2.00
Solubility: Insoluble in: H2O, dilute acids, cold dilute alkali solutions and hot concentrated H2SO4. Soluble in: HF (slightly) and hot concentrated alkali solutions.
Specific Heat: 25.53 Cal/oC/Mole
Thermal Conductivity at 100 oC: a = AXIS 0.0101, c = AXIS 0.0097 (Cal/Sec/cm/cm2/oC)
Thermal Expansion: 4.2 x 10-7 in/in/oF, 7.6 x 10-7 cm/cm/oC