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・ Chromolaena odorata
・ Chromolaena oteroi
・ Chromolaena sagittata
・ Chromolaena sinuata
・ Chromolaena squalida
・ Chromolaena trigonocarpa
・ Chromis retrofasciata
・ Chromis sanctaehelenae
・ Chromis scotti
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Chromite (compound)
・ Chromitite
・ Chromium
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・ Chromium (disambiguation)
・ Chromium (web browser)
・ Chromium acetate hydroxide
・ Chromium B.S.U.
・ Chromium carbide
・ Chromium chloride
・ Chromium deficiency
・ Chromium Embedded Framework
・ Chromium fluoride
・ Chromium hexacarbonyl
・ Chromium hexafluoride


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Chromite (compound) : ウィキペディア英語版
Chromite (compound)

In chemistry, a chromite refers to compounds formally containing the anion . The anion does not exist per se, unless combined with tightly bonded cations. The most famous chromite is the mineral by the same name, FeCr2O4 but many other chromites are known.
Although the majority of chromites have the formula MCrO2 or MCr2O4, the term chromite refers also to other anionic compounds containing Cr(III). For example, hexacyanochromite and hexahydroxychromite refer to the anions and , respectively. Under IUPAC naming conventions, chromate(III) is preferred over chromite, although this nomenclature is rarely followed.
Chromite compounds such as FeCr2O4 may be regarded as being derived from the hypothetical "chromous acid", , but this species does not exist. Chromites are formed by reaction of chromium(III) oxide with metal oxides:
:Cr2O3 + MgO → MgCr2O4
==References==


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