Osmium, Os; Arc-Melted

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Osmium, Os; Arc-Melted
Categories:	Metal; Nonferrous Metal; Precious Metal; Pure Element
Material Notes:	Arc-melted applies only to tensile and/or hardness values; other property values are typical of the element. Physical Form: Blue-White Metal; Hexagonal See entries for annealed and cold worked Os.
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Physical Properties	Metric	English	Comments

Density	22.5 g/cc	0.813 lb/in³

Chemical Properties	Metric	English	Comments
Atomic Mass	190.23	190.23	1995
Atomic Number	76	76
Thermal Neutron Cross Section	15 barns/atom	15 barns/atom
X-ray Absorption Edge	0.1678 Å	0.1678 Å	K
	0.95574 Å	0.95574 Å	L_I
	1.00129 Å	1.00129 Å	L_II
	1.14143 Å	1.14143 Å	L_III
Electrode Potential	0.70 V	0.70 V
Electronegativity	2.2	2.2	Pauling
Ionic Radius	0.690 Å	0.690 Å	Crystal Ionic Radius for Valence +6
	0.880 Å	0.880 Å	Crystal Ionic Radius for Valence +4

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	722	722	Converted from Vickers for 3000 kg load/10 mm ball Brinell test.
Hardness, Knoop	822	822	Converted from Vickers.
Hardness, Rockwell A	83.4	83.4	Converted from Vickers.
Hardness, Rockwell C	64	64	Converted from Vickers.
Hardness, Vickers	800	800
Modulus of Elasticity	560 GPa	81200 ksi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000812 ohm-cm	0.00000812 ohm-cm
Magnetic Susceptibility	4.0e-8	4.0e-8	cgs/g
Critical Magnetic Field Strength, Oersted	70	70
Critical Superconducting Temperature	0.630 - 0.690 K	0.630 - 0.690 K

Thermal Properties	Metric	English	Comments
Heat of Fusion	26.8 J/g	11.5 BTU/lb
Heat of Vaporization	678 J/g	292 BTU/lb
CTE, linear	6.60 µm/m-°C @Temperature 20.0 - 100 °C	3.67 µin/in-°F @Temperature 68.0 - 212 °F
Specific Heat Capacity	0.109 J/g-°C	0.0261 BTU/lb-°F	Gas
	0.131 J/g-°C	0.0313 BTU/lb-°F
Thermal Conductivity	91.67 W/m-K	636.2 BTU-in/hr-ft²-°F
Melting Point	3050 °C	5520 °F
Boiling Point	5012 °C	9054 °F
Heat of Formation	0.000 kJ/mol	0.000 kJ/mol	Crystal
	791 kJ/mol	791 kJ/mol	Gas

Component Elements Properties	Metric	English	Comments
Osmium, Os	100 %	100 %

Descriptive Properties
Solubility	Soluble in Aqua Regia

References for this datasheet.

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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