結晶構造/空間群
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Thrigonal, R3C
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格子定数、Å
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a=4,994A
c=17,081A
v=368,8 A3
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壁開面
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Excellent following (1011)
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分子量
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100,09
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密度
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2,711 g/cm3 at 289 K
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反射損失
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For two surfaces
at 0.22 um for o-ray - 16.9%; for e-ray - 9.2%;
at 0.71 um for o-ray - 11.7%; for e-ray - 7.4%;
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分解温度
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1167 K
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融点
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1612 K at 10,3 Mpa
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硬度
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3
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熱膨張係数
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Parallel 25.1 x 10-6 1/K at 323 K
Perpendicular 4,9 x 10-6 1/K at 323 K
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透過帯域
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0,2-2,5 um
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弾性定数
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c11 13,17 x10 Din/cm
c12 4,82 x10 Din/cm
c13 5,68 x10 Din/cm
c14 -2,0 x10 Din/cm
c22 8,11 x10 Din/cm
c44 3,5 x10 Din/cm
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溶解度
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0,0014 g/l at 298 K
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