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About ChromatiteHide

Yellow, violet
Dull, Earthy
Specific Gravity:
3.142 (Calculated)
Crystal System:
Named by F. J. Eckhardt and W. Heimbach in 1963 for the chemical composition.
Earthy yellow coatings.

Isotypic with zircon and xenotime.

Compare 'UM2011-01-CrO:CaH' - a dihydrate counterpart; and the compositionally similar 'Unnamed (Calcium Chromium Oxide Postspinel)'. Also chemically similar to ellinaite.

Classification of ChromatiteHide


7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
A : Without additional anions
Dana 7th ed.:

3 : AXO4

27 : Sulphites, Chromates, Molybdates and Tungstates
2 : Chromates

Pronounciation of ChromatiteHide

PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of ChromatiteHide

Dull, Earthy
Low luster reported because of the powdery occurrence
Yellow, violet
Violet crystals (Mo-, Pb-bearing) from Bleiberg, Austria.
None Observed
3.142 g/cm3 (Calculated)

Optical Data of ChromatiteHide

Uniaxial (+)
RI values:
nω = 1.810 - 1.850 nε = 1.840 - 1.880
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of ChromatiteHide


Crystallography of ChromatiteHide

Crystal System:
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
Cell Parameters:
a = 7.242 Å, c = 6.290 Å
a:c = 1 : 0.869
Unit Cell V:
329.89 ų (Calculated from Unit Cell)
Observed as earthy coating at type locality

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0017660ChromatiteClouse J (1932) Investigations on the X-Ray Crystal Structures of Ca Cr O4, Ca Cr O4 * H2 O and Ca Cr O4 * (H2 O)2 _cod_database_code 1010939 Zeitschrift fur Kristallographie 83 161-17119320293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
3.62 Å(100)
2.88 Å(20)
2.68 Å(50)
2.56 Å(10)
2.38 Å(20)
1.85 Å(40)
1.81 Å(20)
1.50 Å(10)
8-458 synthetic

Type Occurrence of ChromatiteHide

General Appearance of Type Material:
Earthy coatings
Geological Setting of Type Material:
In sedimentary rock units at the type location.
Associated Minerals at Type Locality:

Other Language Names for ChromatiteHide


Related Minerals - Nickel-Strunz GroupingHide

7.FA.05TarapacáiteK2(CrO4)Orth. mmm (2/m 2/m 2/m)
7.FA.15HashemiteBaCr6+O4Orth. mmm (2/m 2/m 2/m) : Pnma
7.FA.20CrocoitePbCr6+O4Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

27.2.1TarapacáiteK2(CrO4)Orth. mmm (2/m 2/m 2/m)
27.2.2LópeziteK2Cr6+2O7Tric. 1 : P1
27.2.4HashemiteBaCr6+O4Orth. mmm (2/m 2/m 2/m) : Pnma
27.2.5CrocoitePbCr6+O4Mon. 2/m : P21/b
27.2.7SantanaitePb11(CrO4)O12Hex. 6 2 2 : P63 2 2

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ChromatiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Clouse, J.H. (1932): Investigations on the X-ray crystal structures of CaCrO4, CaCrO4⋅H2O and CaCrO4⋅2H20. Z. Kristallogr. A83, 161–171.
Zeitschrift für Kristallographie: 83: 1612-171.
American Mineralogist: 49: 438.
Eckhardt, E.J. and Heimbach, W. (1963): Ein natürliches Vorkommen von CaCrO4 (Chromatit). Naturwissenschaften, 50, 612.
Heimbach, W. (1965): Zum Vorkommen von Chromatit, CaCrO4, in Jordanien. Geologisches Jahrbuch, 83, 717–724 (in German).
Weber, G., Range, K.-J. (1996): Die Kristallstruktur von Calciumchromat(VI), CaCrO4. Zeitschrift für Naturforschung, B: Chemical Sciences, 51, 751-753.

Internet Links for ChromatiteHide

Localities for ChromatiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Carinthia
    • Villach-Land District
      • Bad Bleiberg
Puttner, M. (1997): Chromatit-Kristalle auf Bleiberger Wulfenit - ein natürliches Vorkommen von CaCrO4. Carinthia II, 187./107., 61-65. []
  • Southern District (HaDarom District)
    • Tamar Regional Council
Shulamit Gross (1977) The mineralogy of the Hatrurim Formation, Israel. Geol. Surv. of Israel, Bull. # 70.
  • Amman Governorate
    • Hashem region
      • Lisdan-Siwaga Fault
        • Siwaga
          • Tulul al Hammam
Sokol, E.V.; Kokh, S.N.; Seryotkin, Y.V.; Deviatiiarova, A.S.; Goryainov, S.V.; Sharygin, V.V.; Khoury, H.N.; Karmanov, N.S.; Danilovsky, V.A.; Artemyev, D.A. Ultrahigh-Temperature Sphalerite from Zn-Cd-Se-Rich Combustion Metamorphic Marbles, Daba Complex, Central Jordan: Paragenesis, Chemistry, and Structure. Minerals 2020, 10, 822.
Middle East
Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
  • Telemark
    • Porsgrunn
      • Bjørkedalen
Piilonen, P.C., McDonald, A.M., Poirier, G., Rowe, R. & Larsen, A.O. (2012): The mineralogy and crystal chemistry of alkaline pegmatites in the Larvik Plutonic Complex, Oslo rift valley, Norway. Part 1. Magmatic and secondary zircon: implications for petrogenesis from trace-element geochemistry. Mineralogical Magazine. 76, 649-672; Larsen, A. O. (2013): Contributions to the mineralogy of the syenite pegmatites in the Larvik Plutonic complex. Norsk Bergverksmuseum Skrifter. 50, 101-109
  • West Bank
    • Jericho Governorate
Sokol, E.V., Gaskova, O.L., Kokh, S.N., Kozmenko, O.A., Seryotkin, Y.V., Vapnik, Y., Murashko, M.N. (2011): Chromatite and its Cr3+- and Cr6+-bearing precursor minerals from the Nabi Musa Mottled Zone complex, Judean Desert. American Mineralogist 96, 659-674.
Naturwiss.(1963) 50, 612; Sokol, E.V., Gaskova, O.L., Kokh, S.N., Kozmenko, O.A., Seryotkin, Y.V., Vapnik, Y., Murashko, M.N. (2011): Chromatite and its Cr3+- and Cr6+-bearing precursor minerals from the Nabi Musa Mottled Zone complex, Judean Desert. American Mineralogist 96, 659-674.
  • Sverdlovsk Oblast
    • Nizhnii Tagil
Kozlov, A. P., Chanturiya, V. A., Sidorov, E. G., Tolstykh, N. D., & Telegin, Y. M. (2011). Large-volume platinum ore deposits in zonal mafic-ultramafic complexes of the Ural-Alaskan type and the outlook for their development. Geology of ore deposits, 53(5), 374.
South Africa
  • Limpopo
    • Waterberg District
      • Naboomspruit (Mookgophong); McDonald, I., Vaughan, D. J., & Tredoux, M. (1995). Platinum mineralization in quartz veins near Naboomspruit, central Transvaal. S. Afr. J. Geol, 98, 168-175.
Mineral and/or Locality  
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