Germanium

Symbol: Ge
Atomic Number: 32
Atomic Weight: 72.61
Element Classification: Semimetallic
Discovered By: Clemens Winkler
Discovery Date: 1886 (Germany)
Name Origin: Latin: Germania (Germany).

Density (g/cc): 5.323
Melting Point (K): 1210.6
Boiling Point (K): 3103
Appearance: Grayish-white metal
Atomic Radius (pm): 137
Atomic Volume (cc/mol): 13.6
Covalent Radius (pm): 122
Ionic Radius: 53 (+4e) 73 (+2e)
Specific Heat (@20C J/g mol): 0.322
Fusion Heat (kJ/mol): 36.8
Evaporation Heat (kJ/mol): 328
Thermal Conductivity (@25C W/m K):
Debye Temperature (K): 360.00
Pauling Negativity Number: 2.01
First Ionizing Energy (kJ/mol): 760.0
Oxidation States: 4
Electronic Configuration: [Ar] 3d10 4s2 4p2
Lattice Structure: Diagonal (DIA)
Lattice Constant (): 5.660
Lattice C/A Ratio: n/a

Mineral Hardness [no units]: 6.0

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