Black Graphite Slate Natural Cleft, Honed Bathroom Design

CHEMICAL ANALYSIS
Calcinations loess ……..6,5%
Silicon.……..55,7%
Iron Oxide ………6,3%
Aluminium Oxide …….17,4%
Calcium Oxide ……..6,3%
Magnesium Oxide …2.3 %
Potassium Oxide .……..3.2 %
Sodium Oxide …….1.8 %
Sulphates expressed as SO3…….Inf. 0.1 %
TECHNICAL ANALYSIS
Visible volumetric mass ……..2750 kg/m³
Absorption coefficient …….0,35 %
Breaking load through indirect stress by bending …from 50,7 MPa
Hardness (Mohs)……~ 3,5/4
Wear by attrition: abrasion coefficient in tribometer ….6,7 mm
Frost proof ……Very Good