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Serizzo Antigorio
The Serizzo Antigorio stone is geologically classified as a metamorphic rock. It is an orthogneiss biotitic granite, occhiadino, (ocellar gneiss with eye-shaped feldspar specks), it has regular grains and its colour is prevalently dark- grey, due to the presence of biotite mica. The Serizzo Antigorio stone has an evident foliation.
Mineralogical characteristics:
The Serizzo Antigorio stone, is mainly composed by quartz, potassium feldspar, biotite and scarcely composed by muscovite and epidote.
CHEMICAL ANALYSIS
| SiO2 | = 68,0 |
| TiO2 | = 1,4 |
| Al2O3 | = 17,6 |
| Fe2O3 | = 0,5 |
| FeO | = 1,9 |
| MgO | = 1,1 |
| CaO | = 2,0 |
| Na2O | = 3,7 |
| K2O | = 3,8 |
PHYSICAL MECHANICAL DATA
| Compressioni breaking load | Mpa 141 |
| Compression breaking load after freezing | Mpa 128 |
| Imbibition coefficient | gr%0 3,75 |
| Ultimate tensile strengh | MpA 16 |
| Impact test: minimum fall height | cm. 82 |
| Thermal linear expansion coefficient | 106/°C 12,75 |
| Frictional wear test: relative | 0,75 |
| Wight per unit of volume | kN/m3 27,3 |
| Elasticy module | tangente Et - Mpa 40824 secante Es - Mpa 20199 |
| Knoop microhardness | Mpa 4576 |
| Poisson coefficient | tangente ut- 0,361 secante ut- 0,122 |
| Speed ultrasonic waves | m/s 2295 |
