Quartz glass technical

·         Density: 2.203 g/cm³

·         Hardness: 5.3...6.5 (Mohs scale), 8.8 GPa

·         Tensile strength: 48.3 MPa

·         Compressive strength: >1.1 GPa

·         Bulk modulus: ~37 GPa

·         Rigidity modulus: 31 GPa

·         Young's modulus: 71.7 GPa

·         Poisson's ratio: 0.17

·         Lamé elastic constants: λ = 15.87 GPa, μ = 31.26 GPa

·         Coefficient of thermal expansion: 5.5 ⋅ 10⁻⁷/K (average from 20...320 °C)

·         Thermal conductivity: 1.3 W/(m·K)

·         Specific heat capacity: 45.3 J/(mol·K)

·         Softening point: ≈1665 °C

·         Annealing point: ≈1140 °C

·         Strain point: 1070 °C

·         Electrical resistivity: >10¹⁸ Ω·m

·         Dielectric constant: 3.75 at 20 °C 1 MHz

·         Magnetic susceptibility: −11.28 ⋅ 10⁻⁶ (SI, 22 °C)^[10]

·         Dielectric loss factor: less than 0.0004 at 20 °C 1 MHz typically 6 ⋅ 10⁻⁵ at 10 GHz^[11]

·         Index of refraction: n_d = 1.4585 (at 587.6 nm)

·         Change of refractive index with temperature (0...700°C)^[clarify]: 1.28 ⋅ 10⁻⁵/K (between 20...30 °C)^[9]

·         Stress-optic coefficients: p₁₁ = 0.113, p₁₂ = 0.252.

·         Hamaker constant: A = 6.5 ⋅ 10⁻²⁰ J.

·         Dielectric strength: 250...400 kV/cm at 20 °C^[12]

·         Surface tension: 0.300 N/m at 1800...2400 °C^[13]

·         Abbe Number: Vd = 67.82^[14]