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Stock List Crystals & Substrates

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SurfaceNet GmbH Germany (Crystals, Substrates, Service)
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Barium fluorid ( BaF2 )

 

Crystal properties

Crystal Type.

cubic, CaF2 type structure

Barium Fluoride, SurfaceNet GmbH Germany

Transmission Range

0.15 ... 15 m

Refractive Index

no = 1,6654
n
e = 1,4898 @ 509 nm

Density

4.89 g/cm3

Melting Point

1280, 1355 C

Molecular Weight

175.3368

Thermal Conductivity

11.72 W/(m K) @ 13 C

Specific Heat

410 J/(kg K) @ 27 C

Thermal Expansion

18.1 106 / K @ 110...120 C

Hardness (Knoop)

82 (indenter load: 500 g)

Youngs Modulus

56.4 GPa

Shear Modulus

25.4 GPa

Bulk Modulus

268.89 GPa

Rupture Modulus

26.2 Mpa

Elastic Coefficient

C11 = 90.4

C12 = 40.6

C44 = 25.3 Gpa

Dielectric Constant

7.33 @ f = 2 MHz

Solubility in Water

0.17 g / 100 g @ 23 C

Crystal Structure

single crystal, synthetic

Cleavage Planes

(111)

Application

Scintillation material
correction part in lens systems

Remarks

radiation resistant
susceptible to thermal shock
laser damage threshold: 27,5 GW/cm2,
@ 3.8 m, 75 ns pulse length

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List of Optical Crystals

Refractive Index

Transmission
Range (mm)

Density
(g/cm)

Thermal Expansion 
Coefficient (10-6
/K) 

BK7 glass

1.5164 (588 nm)

0.330 2.1

2.51

7.5 

SF11 glass

1.78472 (588 nm)

0.370 2.5

4.74

6.8 

F2 glass

1.62004 (588 nm)

0.420 2.0

3.61

8.2 

Fused Silica

1.4858 (308 nm)

0.185 2.5

2.20

0.55 

CaF2

1.399  (5.0 mm)

 0.170 7.8

 3.18

 18.85 

BaF2

 1.460 (3.0 um)

 0.15 12.0

 4.88

 18.4 

Sapphire

1.755 (1.0mm)

0.180 4.5

3.98

8.4 

Silicon

3.4179 (10mm)

 1.200 7.0

 2.33

 4.15 

Ge

4.003 (10 mm)

 1.900 16

 5.33

 6.1 

ZnSe

2.40  (10 mm)

0.630 18

5.27

7.8 

ZnS

2.2 (10mm)

0.380 14

4.09

6.5 

LiF

1.39 (500 nm)

 0.150 5.2

 2.64

37 

KBr

1.526 (10 mm)

 0.280 22

 2.75

43 

 MgF2

no =  1.3836  ne = 1.3957 (405 nm)

0.130 7.0

7.37

a: 13.7         b: 8.48 

YVO4

no = 1.9500  ne = 2.1554 (1.3 mm)

0.400 5.0

4.22

a: 4.46       b: 11.37 

Calcite

no =  1.6557  ne = 1.4852 (633 nm)

0.210 2.3

2.75

a: 24.39        b: 5.68 

Quartz

no =  1.5427  ne = 1.5518 (633 nm)

0.200 2.3

2.65

7.07 

α-BBO

no =  1.6749  ne = 1.5555 (532 nm)

0.190 3.5

3.85

a: 4.0           c: 36 

LiNbO3

no =  2.2863  ne = 2.2027 (633 nm)

0.370 4.5

4.64

a: 16.7          c: 2.0 

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