Glass state

Nucleated

Crystallized

Density

ρ

g/cm³

2.51

-

-

Flexural strength (DIN EN ISO 6872)

σ

MPa

94 ± 22

146 ± 29

217 ± 41

Fracture toughness (ISO 23146)

K_IC

MPam^1/2

0.72 ± 0.02

0.90 ± 0.10

1.72 ± 0.13

Refractive index

n

-

1.52

1.54

-