Calcium sulfate (CaSO₄) is an inorganic ceramic compound commonly encountered in two hydrated forms: dihydrate (gypsum) and hemihydrate (plaster of Paris). It is a brittle, crystalline material valued for its low cost, availability, and biocompatibility, making it practical for applications where moderate stiffness and ease of processing are priorities. In construction and medical fields, calcium sulfate is prized for rapid setting, dimensional stability, and the ability to be cast or molded; in biomedical contexts, its resorbability and non-toxicity make it suitable for temporary structural support, though it is generally softer and less durable than competing ceramics like alumina or zirconia.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 10,062.7 | ksi | — | ||
Poisson's Ratio(ν) | 0.2900 | - | — | ||
Shear Modulus(G) | 5,968.3 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1140 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 6.563 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 8.296 | - | — | ||
| ↳ | 4.979 range 2.735–7.223median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.03331 | C/m² | — | ||
Seebeck Coefficient(S) | -225.7 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.00870 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -2.477 | eV/atom | — | ||
| ↳ | -2.319 | eV/atom | — |