Physical properties of quartz crystal

Anisotropy is a typical physical property of quartz crystals, which has the following physical constants. which is:

⑴, density: 2.649 g / cubic meter;

⑵, refractive index: 1.553 (or 1.5574), with optical rotation;

⑶, velocity of sound: V = E / e E is the Young's coefficient, with the direction of change has different values;

⑷, thermal expansion coefficient: parallel to the optical axis X = 77.10 × 10 (0 ℃) perpendicular to the optical axis X = 15.24 × 10 (0 ℃);

⑸, insulation performance: parallel to the optical axis R = 1 × 10 ohm. Cm perpendicular to the optical axis R = 2 × 10 ohm. Cm;

⑹, thermal conductivity: no Z direction than the vertical Z direction of the thermal conductivity of about twice as large;

⑺, elastic performance: its Young's coefficient in the cross-section is not the same.