CAS 7440-56-4 Germanium Optical Window, 50.8mm (2.0in) dia x 2mm (0.08in) thick

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Germanium Optical Window, 50.8mm (2.0in) dia x 2mm (0.08in) thick

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Catalog Number

ACM7440564-7

CAS Number

7440-56-4

Product Name

Germanium Optical Window, 50.8mm (2.0in) dia x 2mm (0.08in) thick

Category

Windows & Spheres

Description

PelletsLargeCrystals, WetSolid, OtherSolid

IUPAC Name

germanium

Molecular Weight

72.63g/mol

Molecular Formula

Canonical SMILES

[Ge]

InChI

InChI=1S/Ge

InChI Key

GNPVGFCGXDBREM-UHFFFAOYSA-N

Boiling Point

2700 °C

Melting Point

937.2 °C

Density

5.323 @ 25 °C/4 °C

Solubility

INSOL IN WATER, HYDROCHLORIC ACID, DIL ALKALI HYDROXIDES;SOL IN HOT SULFURIC ACID, AQUA REGIA; INSOL IN ALKALI

Application

The Germanium Optical Window, with a diameter of 50.8mm (2.0 inches) and a thickness of 2mm (0.08 inches), is designed to serve as a crucial component in systems that operate within the infrared spectrum. Derived from a grayish-white, lustrous, and brittle metalloid, germanium is employed due to its superior ability to transmit infrared radiation. This property makes it ideal for use in laser applications and infrared guidance or detection systems. By utilizing the favorable semiconductor characteristics of germanium, such as its stability and formation of various compounds, this optical window enhances the performance and accuracy of devices requiring high refractivity and dispersion, such as specialized lenses in cameras and microscopes. Through advanced processing and refinement, the germanium used in these windows is carefully extracted and prepared to meet the demanding requirements of contemporary infrared technology applications.

Color/Form

GRAYISH-WHITE, LUSTROUS, BRITTLE METALLOID; DIAMOND-CUBIC STRUCTURE WHEN CRYSTALLINE

Complexity

Covalently-Bonded Unit Count

EC Number

231-164-3

Exact Mass

73.921178g/mol

Formal Charge

Heat of Vaporization

3.5733X10+8 J/kmol @ melting point

Heavy Atom Count

MeSH Entry Terms

Germanium

Monoisotopic Mass

73.921178g/mol

Other Experimental

THERMAL EXPANSION COEFFICIENT AT APPROX 25 °C: 6.1X10-6 °C; THERMAL CONDUCTIVITY @ 25 °C: 0.14 CAL/SEC CM/DEG C; SPECIFIC HEAT (0-100 °C): 0.074 CAL/G/DEG C;LATTICE CONSTANT @ 25 DEG: 5.657X10-8 CM; VOL COMPRESSIBILITY: 1.3X10-12 SQ CM/DYN; DIELECTRIC CONSTANT: 16; MAGNETIC (MASS) SUSCEPTIBILITY (CHI X10+6)= -0.12;COVALENT BOND IONIZATION ENERGY @ 0 DEG K= 1.2 ELECTRON VOLT; BAND GAP: 0.67 ELECTRON VOLT; ATOMS/CC= 4.42X10+22; IMPURITY ATOM IONIZATION ENERGY: APPROX 0.01 ELECTRON VOLT; INTRINSIC RESISTIVITY @ 300 DEG K= 47 OHM-CM;ELECTRON MOBILITY @ 300 DEG K: 3900 SQ CM/V SEC; HOLE MOBILITY @ 300 DEG K= 1900 CM/V SEC; HOLE DIFFUSION CONSTANT @ 300 DEG K= 49;INTRINSIC CHARGE DENSITY @ 300 DEG K= 2.4X10+13; ELECTRON DIFFUSION CONSTANT @ 300 DEG K= 100;IS HIGHLY TRANSPARENT TO INFRARED LIGHT; HAS A HIGH INDEX OF REFRACTION;THE METAL & MANY OF ITS ALLOYS EXPAND ON SOLIDIFICATION;FIVE NATURALLY OCCURRING ISOTOPES: 70 (20.55%); 72 (27.37%); 73 (7.67%); 74 (36.74%); 76 (7.67%); ATOMIC NUMBER 32;POOR CONDUCTOR OF ELECTRICITY; VOL SMALLER BY FEW % WHEN MOLTEN; ATTACKED BY AQUA REGIA, CONCN NITRIC OR SULFURIC ACIDS, FUSED ALKALIES, ALKALI PEROXIDES, NITRATES, OR CARBONATES;HARDNESS 6 ON MOHS SCALE;Liquid molar volume = 0.013001 cu m/kmol determined at the triple point.;IG heat of formation = 3.766X10+8 J/kmol (ideal gas); for the crystal the enthalpy of formation is 0 at 298.15 K.;Heat of fusion at melting point = 3.18X10+7 J/kmol.

Rotatable Bond Count

Stability

RELATIVELY STABLE, UNAFFECTED BY AIR, BECOMES OXIDIZED ABOVE 600 °C

UNII

619P6J82AE;00072J7XWS

Vapor Pressure

0 mm Hg @ 25 °C

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