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Chalk (soft calcareous) vs Gneiss
Property comparison of Chalk (soft calcareous) and Gneiss, both stone.
| Property | Chalk (soft calcareous) | Gneiss | Difference |
|---|---|---|---|
| Tensile strength | 1 MPa | 16 MPa | +1500% |
| Poisson ratio | 0.3 | 0.2 | -33% |
| Density | 1,800 kg/m³ | 2,700 kg/m³ | +50% |
| Thermal conductivity | 1.2 W/m·K | 2.5 W/m·K | +108% |
| Specific heat | 840 J/kg·K | 800 J/kg·K | -5% |
| Coefficient of thermal expansion | 0.000012 1/K | 0.000007 1/K | -42% |
Difference is Gneiss relative to Chalk (soft calcareous). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
Chalk (soft calcareous)
- standard
- ASTM D7012
Gneiss
- standard
- ASTM C615
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