Mateck Magnesium Fluoride (MgF 2 )

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Mateck Magnesium Fluoride (MgF₂)
Categories:	Ceramic; Halide
Material Notes:	Optical crystals
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Physical Properties	Metric	English	Comments

Density	3.18 g/cc	0.115 lb/in³
Solubility	0.0076 ppm	0.0076 ppm
a Lattice Constant	4.64 Å	4.64 Å
c Lattice Constant	3.06 Å	3.06 Å
Molecular Weight	62.32 g/mol	62.32 g/mol

Mechanical Properties	Metric	English	Comments
Vickers Microhardness	2890	2890	MPa
	4410	4410	MPa
Hardness, Mohs	6.0	6.0
Modulus of Elasticity	79.7 GPa	11600 ksi	parallel to c-axis
	169.1 GPa	24530 ksi	perpendicular to c-axis
Poissons Ratio	0.577	0.577
Shear Modulus	57.1 GPa	8280 ksi	perpendicular to c-axis
	95.2 GPa	13800 ksi	parallel to c-axis

Thermal Properties	Metric	English	Comments
CTE, linear	6.23 - 9.25 µm/m-°C @Temperature -60.0 - 60.0 °C	3.46 - 5.14 µin/in-°F @Temperature -76.0 - 140 °F	perpendicular to c-axis
	10.86 - 14.54 µm/m-°C @Temperature -60.0 - 60.0 °C	6.033 - 8.078 µin/in-°F @Temperature -76.0 - 140 °F	parallel to c-axis
Specific Heat Capacity	0.920 J/g-°C	0.220 BTU/lb-°F
Melting Point	1255 °C	2291 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.3904	1.3904	at nf' - nc'
	1.3044 @Wavelength 7000 nm	1.3044 @Wavelength 7000 nm	no
	1.3101 @Wavelength 7000 nm	1.3101 @Wavelength 7000 nm	ne
	1.3618 @Wavelength 3000 nm	1.3618 @Wavelength 3000 nm	no
	1.3724 @Wavelength 3000 nm	1.3724 @Wavelength 3000 nm	ne
	1.3786 @Wavelength 546.1 nm	1.3786 @Wavelength 546.1 nm	at ne
	1.4231 @Wavelength 200 nm	1.4231 @Wavelength 200 nm	no
	1.4367 @Wavelength 200 nm	1.4367 @Wavelength 200 nm	ne
Transmission, Visible	97 % @Wavelength 500 nm	97 % @Wavelength 500 nm	Internal Transmittance
IR Transmittance	12 % @Wavelength 8000 nm	12 % @Wavelength 8000 nm	Internal Transmittance
	91 % @Wavelength 6000 nm	91 % @Wavelength 6000 nm	Internal Transmittance
UV Transmittance	95 % @Wavelength 200 nm	95 % @Wavelength 200 nm	Internal Transmittance

Descriptive Properties
Cleavability	(100)		perfect
	(110)
Constants of Elastic Compliance (Pa^-1)	1.053E-11		S66
	1.245E-11		S11
	-1.66E-12		S13
	1.754E-11		S44
	5.94E-12		S33
	-7.16E-12		S12
Symmetry	tetragonal
Symmetry Class	4/mmm
Thermal Coefficient of Refractive Index	1.5E-6 to 1E-6		ß0 at 3.39 microns for ±60°C
	1.5E-6 to 1E-6		ße at 3.39 microns for ±60°C
Transmission Range (microns)	0.13 - 0.7

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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