sesquioxide

American  

[ses-kwee-ok-sahyd, -sid] / ˌsɛs kwiˈɒk saɪd, -sɪd /

noun

Chemistry.

1. an oxide containing three atoms of oxygen and two of another element, as aluminum oxide, Al 2 O 3 .

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sesquioxide British  

/ ˌsɛskwɪˈɒksaɪd /

noun

1. any of certain oxides whose molecules contain three atoms of oxygen for every two atoms of the element

   chromium sesquioxide, Cr2O3

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Etymology

Origin of sesquioxide

First recorded in 1825–35; sesqui- + oxide

Example Sentences

The rare metal iridium affords a blue which is a mixture of the oxide and the sesquioxide.

From Field's Chromatography or Treatise on Colours and Pigments as Used by Artists by Salter, Thomas

I use a paper prepared with iron sesquioxide rendered sensitive to light by tartaric or, better, citric acid in concen­trated solution.

From Photographic Reproduction Processes by Duchochois, Peter C.

As an antidote, the best when the poison is in solution is the hydrated sesquioxide of iron, formed by precipitating tinctura ferri perchloridi with excess of ammonia, or carbonate of soda.

From Aids to Forensic Medicine and Toxicology by Robertson, W. G. Aitchison (William George Aitchison )

They are readily decomposed by heat, leaving a residue of the normal chromate and chromium sesquioxide, and liberating oxygen; ammonium bichromate, however, is completely decomposed 913 into chromium sesquioxide, water and nitrogen.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" by Various

When heated with sulphur it yields chromium sesquioxide.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" by Various