CAS 1303-00-0 Gallium arsenide - Materials / Alfa Chemistry

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Gallium arsenide

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Catalog Number

ACM1303000

CAS Number

1303-00-0

Product Name

Gallium arsenide

Structure

Category

Electronic Materials; Substrates and Electrode Materials

Description

Gallium arsenide appears as dark gray crystals with a metallic greenish-blue sheen or gray powder. Melting point 85.6°F (29.78°C).;Dark gray crystals with a metallic greenish-blue sheen or gray powder.

IUPAC Name

gallanylidynearsane

Molecular Weight

144.64g/mol

Molecular Formula

GaAs;GaAs;AsGa

Canonical SMILES

[Ga]#[As]

InChI

InChI=1S/As.Ga

InChI Key

JBRZTFJDHDCESZ-UHFFFAOYSA-N

Melting Point

2260 °F (NTP, 1992);1238 °C;2260°F

Density

5.31 at 77 °F (NTP, 1992);5.3176 @ 25 °C;5.31

Solubility

less than 1 mg/mL at 68° F (NTP, 1992);<1 mg/mg in DMSO, 95% ethanol, methanol, and acetone; soluble in hydrochloric acid;In water, <1 mg/ml @ 20 °C

Application

Gallium arsenide is used extensively as a semiconductor in electronic devices due to its unique properties. Its crystalline structure, composed of 48.2% gallium and 51.8% arsenic, features a dark gray metallic sheen and is electroluminescent in infrared light. This makes it ideal for applications in transistors, solar cells, lasers, and light-emitting diodes. With a hardness of 4.5, it reacts with oxygen to form oxides on surfaces and has a thermal expansion coefficient of 5.9×10^-6. Its thermal conductivity is 0.52 W per unit, while its specific heat stands at 0.086 cal/g/°C. Gallium arsenide boasts an energy gap of 1.38 eV at room temperature, with notable electron mobility of 8,800 cm^2/V/s. Given its effective electron mass of 0.06m0 and lattice constant of 5.6-5.4 Å, it holds a dielectric constant of 11.1 and intrinsic resistivity of 3.7×10^8 Ωcm at 300K. Its electron lattice mobility, intrinsic charge density, electron diffusion constant, and hole diffusion constant further contribute to its widespread use as an intermetallic semiconductor component. Despite its garlic odor when moistened and reactivity with steam, acids, and oxidizers, gallium arsenide remains a crucial material for developing advanced technologies and efficient, high-performance devices.

Color/Form

Cubic crystals, dark gray with metallic sheen;Gray cubic crystals

Complexity

Covalently-Bonded Unit Count

EC Number

215-114-8

Exact Mass

143.84717g/mol

Formal Charge

Heavy Atom Count

MeSH Entry Terms

GaAs;gallium arsenate;gallium arsenide

Monoisotopic Mass

143.84717g/mol

Odor

Garlic odor when moistened

Other Experimental

Hardness 4.5; thermal expansion coefficient: 5.9x10-6; thermal conductivity 0.52 watt units; specific heat 0.086 cal/g/deg c; intrinsic electron concn 10+7; energy gap @ room temp 1.38 electron volts; electron mobility 8800 square cm/volt sec; effective mass for electrons 0.06 m(-0);Lattice constant 5.6-54 Angstroms; dielectric constant 11.1; intrinsic resistivity @ 300 deg K= 3.7X10+8 ohm-cm; electron lattice mobility @ 300 deg K= 10,000 square cm/volt-sec; intrinsic charge density @ 300 deg K= 1.4X10+6/cc; electron diffusion constant @ 300 deg K= 310 square cm/sec; hole diffusion constant= 11.5 square cm/sec;Electroluminescent in infrared light;Forms a hydrate which is orthorhombic and it can form acidic salts

Rotatable Bond Count

UNII

27FC46GA44

UN Number

1557;3077

MSDS

Download MSDS

COA

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Spec Sheet

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