Strontium oxide

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Strontium oxide[1]
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Template:Longitem SrO
Molar mass 103.619 g/mol
Appearance colorless cubic crystals
Density 4.70 g/cm3
Melting point Template:Chembox CalcTemperatures
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Solubility miscible with potassium hydroxide
slightly soluble in alcohol
insoluble in acetone and ether
Template:Longitem −35.0·10−6 cm3/mol
Template:Longitem 1.810 [2]
Template:Longitem Halite (cubic), cF8
Template:Longitem Fm3m, No. 225
Template:Longitem Octahedral (Sr2+); octahedral (O2−)
Template:Longitem 44.3 J·mol−1·K−1
Template:Longitem 57.2 J·mol−1·K−1
Template:Longitem −592.0 kJ·mol−1
Flash point Template:Chembox CalcTemperatures
Template:Longitem Strontium sulfide
Template:Longitem Beryllium oxide
Magnesium oxide
Calcium oxide
Barium oxide
Template:Longitem Strontium hydroxide

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Strontium oxide or strontia, SrO, is formed when strontium reacts with oxygen. Burning strontium in air results in a mixture of strontium oxide and strontium nitride. It also forms from the decomposition of strontium carbonate SrCO3. It is a strongly basic oxide.

Uses

About 8% by weight of cathode-ray tubes is strontium oxide, which has been the major use of strontium since 1970.[3][4] Color televisions and other devices containing color cathode-ray tubes sold in the United States are required by law to use strontium in the faceplate to block X-ray emission (these X-ray emitting TVs are no longer in production). Lead(II) oxide can be used in the neck and funnel, but causes discoloration when used in the faceplate.[5]

Reactions

Elemental strontium is formed when strontium oxide is heated with aluminium in a vacuum.[1]

References

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  1. ↑ a b Script error: No such module "citation/CS1".
  2. ↑ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, Template:ISBN
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External links

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