Sandoz Fils SA

RUBY

Size from .005'' to 1/2

Al₂0₃

Hexagonale rhomboedrique

Density 3,99 - 3,98

Fusion Temperature 2050°C

Thermal expansion 5,4 x 10-6/°C face perp. axe C

6,2 x 10-6/°C face paral. axe C

Hardness Mohs 9

Hardness Knoop 1800 face perp. axe C

2200 face paral. axe C

1,769 face paral. axe C

Dispersion factor 0.011

Doped with 0.5% Cr

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