Manganese

Symbol: Mn
Atomic Number: 25
Atomic Weight: 54.93805
Element Classification: Transition Metal
Discovered By: Johann Gahn
Discovery Date: 1774 (Sweden)
Name Origin: Latin: magnes (magnet); Italian: manganese.

Density (g/cc): 7.21
Melting Point (K): 1517
Boiling Point (K): 2235
Appearance: Hard, brittle, gray-white metal
Atomic Radius (pm): 135
Atomic Volume (cc/mol): 7.39
Covalent Radius (pm): 117
Ionic Radius: 46 (+7e) 80 (+2e)
Specific Heat (@20C J/g mol): 0.477
Fusion Heat (kJ/mol): (13.4)
Evaporation Heat (kJ/mol): 221
Thermal Conductivity (@25C W/m K):
Debye Temperature (K): 400.00
Pauling Negativity Number: 1.55
First Ionizing Energy (kJ/mol): 716.8
Oxidation States: 7, 6, 4, 3, 2, 0, -1
Electronic Configuration: [Ar] 3d5 4s2
Lattice Structure: Cubic (CUB)
Lattice Constant (): 8.890
Lattice C/A Ratio: n/a

Mineral Hardness [no units]: 6.0
Brinell Hardness [/MN m-2]: 196

Copyright © 2017 by Steel Data. All Rights Reserved.