Chromatite (original) (raw)

A valid IMA mineral species

About ChromatiteHide

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Specific Gravity:

3.142 (Calculated)

Crystal System:

Tetragonal

Name:

Named by F. J. Eckhardt and W. Heimbach in 1963 for the chemical composition.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:1030:2

dfedf6b0-a130-4c84-bf7d-f5f609bce207

IMA Classification of ChromatiteHide

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Classification of ChromatiteHide

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7.FA.10

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

35.3.2.1

35 : ANHYDROUS CHROMATES
3 : AXO4

27.2.3

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

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Pronunciation of ChromatiteHide

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Pronunciation:

Physical Properties of ChromatiteHide

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Comment:

Low luster reported because of the powdery occurrence

Comment:

Violet crystals (Mo-, Pb-bearing) from Bleiberg, Austria.

Density:

3.142 g/cm3 (Calculated)

Optical Data of ChromatiteHide

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RI values:

_n_ω = 1.810 - 1.850 _n_ε = 1.840 - 1.880

δ = 0.030

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of ChromatiteHide

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Crystallography of ChromatiteHide

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Crystal System:

Tetragonal

Class (H-M):

4/m m m _(_4/_m_2/_m_2/m ) - Ditetragonal Dipyramidal

Cell Parameters:

a = 7.242 Å, c = 6.290 Å

Unit Cell V:

329.89 ų (Calculated from Unit Cell)

Morphology:

Observed as earthy coating at type locality

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0017660	Chromatite	Clouse 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 83 161-171		1932	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of ChromatiteHide

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General Appearance of Type Material:

Geological Setting of Type Material:

In sedimentary rock units at the type location.

Associated Minerals at Type Locality:

Other Language Names for ChromatiteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

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

Internet Links for ChromatiteHide

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References for ChromatiteHide

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Localities for ChromatiteHide

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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

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.