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  2. Chromium compounds - Wikipedia

    en.wikipedia.org/wiki/Chromium_compounds

    Chromium compounds are compounds containing the element chromium (Cr). Chromium is a member of group 6 of the transition metals . The +3 and +6 states occur most commonly within chromium compounds, followed by +2; charges of +1, +4 and +5 for chromium are rare, but do nevertheless occasionally exist.

  3. Chromium - Wikipedia

    en.wikipedia.org/wiki/Chromium

    Chromium is a chemical element; it has symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal. [10] Chromium is valued for its high corrosion resistance and hardness.

  4. List of mineral symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_mineral_symbols

    Mineral symbols (text abbreviations) are used to abbreviate mineral groups, subgroups, and species, just as lettered symbols are used for the chemical elements.. The first set of commonly used mineral symbols was published in 1983 and covered the common rock-forming minerals using 192 two- or three-lettered symbols. [1]

  5. Chromate and dichromate - Wikipedia

    en.wikipedia.org/wiki/Chromate_and_dichromate

    In acid solution the aquated Cr 3+ ion is produced. Cr 2 O 2− 7 + 14 H + + 6 e − → 2 Cr 3+ + 7 H 2 O ε 0 = 1.33 V. In alkaline solution chromium(III) hydroxide is produced. The redox potential shows that chromates are weaker oxidizing agent in alkaline solution than in acid solution. [6] CrO 2− 4 + 4 H 2 O + 3 e − → Cr(OH) 3 + 5 OH

  6. Chromium(III) hydroxide - Wikipedia

    en.wikipedia.org/wiki/Chromium(III)_hydroxide

    Chromium(III) hydroxide is a gelatinous green inorganic compound with the chemical formula Cr(OH) 3. It is a polymer with an undefined structure and low solubility. It is amphoteric, dissolving in both strong alkalis and strong acids. [2] In alkali: Cr(OH) 3 + OH − → CrO − 2 + 2 H 2 O In acid: Cr(OH) 3 (OH 2) 3 + 3 H + → Cr(OH 2) 6 3+

  7. List of inorganic compounds - Wikipedia

    en.wikipedia.org/wiki/List_of_inorganic_compounds

    Ammonium dichromate – [NH 4] 2 Cr 2 O 7 [42] Ammonium dihydrogen phosphate – [NH 4]H 2 PO 4; Ammonium hexafluoroaluminate – AlF 6 H 12 N 3 [43] Ammonium hexafluorophosphate – F 6 H4 NP [44] Ammonium hexachloroplatinate – [NH 4] 2 [PtCl 6] [45] Ammonium hexafluorosilicate [46] Ammonium hexafluorotitanate [47] Ammonium ...

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  9. Category:Minerals by element - Wikipedia

    en.wikipedia.org/wiki/Category:Minerals_by_element

    Category: Minerals by element. ... Chromium minerals (1 C, 19 P) Cobalt minerals (22 P) Copper minerals (4 C, 68 P) D. Dysprosium minerals (1 P) G. Gadolinium ...

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