Germanium single crystal disc, 10mm (0.39in) dia, 1-3mm (0.04-0.1in) thick, (100) orientation, ±0.5°

• CAS: 7440-56-4
• Catalog Number: ACM7440564-2
• Category: Pure Element Single Crystals
• Molecular Weight: 72.63g/mol
• Molecular Formula: Ge
• Description: PelletsLargeCrystals, WetSolid, OtherSolid
• IUPAC Name: germanium
• 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
• Color/Form: GRAYISH-WHITE, LUSTROUS, BRITTLE METALLOID; DIAMOND-CUBIC STRUCTURE WHEN CRYSTALLINE
• Complexity: 0
• Covalently-Bonded Unit Count: 1
• EC Number: 231-164-3
• Exact Mass: 73.921178g/mol
• Formal Charge: 0
• H-Bond Acceptor: 0
• H-Bond Donor: 0
• Heat of Vaporization: 3.5733X10+8 J/kmol @ melting point
• Heavy Atom Count: 1
• 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: 0
• Stability: RELATIVELY STABLE, UNAFFECTED BY AIR, BECOMES OXIDIZED ABOVE 600 °C
• UNII: 619P6J82AE;00072J7XWS
• Vapor Pressure: 0 mm Hg @ 25 °C