This table lists the permittivity ε, frequently called the dielectric constant, of a number of inorganic solids. When the material is not isotropic, the individual components of the permittivity are given. A superscript S indicates a measurement made under constant strain (“clamped” dielectric constant). If the constraint is removed, the measurement yields εT, the “unclamped” or free dielectric constant.
Column definitions for the table are as follows.
Column heading | Definition |
Mol. form. | Molecular formula of inorganic solid, listed in alphabetical order |
Name | Name of inorganic solid |
εijk | Permittivity (dielectric constant) of the inorganic solid; see discussion above for different component specifications |
T | Temperature, in K, of the measurement is given when available; the symbol r.t. indicates a value at nominal room temperature |
ν | Frequency, in Hz, of the measurement; i.r. indicates a measurement in the infrared region |
Mol. form. | Name | Synonym | CAS RN | εijk | T/K | ν/Hz |
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Ag3AsS3 | Silver thioarsenate | Proustite | 15123-81-6 | r.t. | 2 × 107 | |
Ag3AsS3 | Silver thioarsenate | Proustite | 15123-81-6 | r.t. | 2 × 107 | |
AgBr | Silver(I) bromide | Bromyrite | 7785-23-1 | 12.50 | r.t. | |
AgCN | Silver(I) cyanide | 506-64-9 | 5.6 | r.t. | 106 | |
AgCl | Silver(I) chloride | Cerargyrite | 7783-90-6 | 11.15 | r.t. | |
AgNO3 | Silver(I) nitrate | 7761-88-8 | 9.0 | 293 | 5 × 105 | |
AgNa(NO2)2 | Silver sodium nitrite | 4.5 ± 0.5 | r.t. | 9.4 ×109 | ||
Ag2O | Silver(I) oxide | 20667-12-3 | 8.8 | r.t. | ||
Al2F2SiO4 | Aluminum fluorosilicate | Topaz | 16919-19-0 | ε11 = 6.62 | 297 | 7 × 103 |
Al2F2SiO4 | Aluminum fluorosilicate | Topaz | 16919-19-0 | ε22 = 6.58 | 297 | 7 × 103 |
Al2F2SiO4 | Aluminum fluorosilicate | Topaz | 16919-19-0 | ε33 = 6.95 | 297 | 7 × 103 |
Al2O3 | Aluminum oxide (α) | Corundum | 1344-28-1 | ε11 = ε22 = 9.34 | 298 | 102–8 × 109 |
Al2O3 | Aluminum oxide (α) | Corundum | 1344-28-1 | ε33 = 11.54 | 298 | 102–8 × 109 |
AlPO4 | Aluminum phosphate | Aluminum orthophosphate | 7784-30-7 | r.t. | 103 | |
AlSb | Aluminum antimonide | 25152-52-7 | 11.21 | 300 | i.r. | |
AsF3 | Arsenic(III) fluoride | Arsenic trifluoride | 7784-35-2 | 5.7 | r.t. | |
BN | Boron nitride | 10043-11-5 | 7.1 | r.t. | i.r. | |
BaCO3 | Barium carbonate | Witherite | 513-77-9 | 8.53 | 291 | 2 × 105 |
Ba(COOH)2 | Barium formate | 541-43-5 | ε11 = 7.9 | r.t. | 103 |
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