Crimsonite (original) (raw)

A valid IMA mineral species

Formula:

PbFe3+2(PO4)2(OH)2

Specific Gravity:

5.180 (Calculated)

Crystal System:

Orthorhombic

Name:

The name is based upon the mineral’s deep red (crimson) color and the fact that it is the phosphate analogue of carminite, a mineral with a very similar deep red colour and whose name is also based upon its colour (carmine).

The P analogue of carminite. Chemically related to kintoreite and pattersonite.

In the structure, there are edge-sharing FeO6 octahedra, forming dimers. The dimers share corners to form chains along [010]. The phosphate groups connect the chains to form sheets || {001}. [8]Pb act as a link for the sheets.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:46570:8

e0f63142-0104-4c98-b304-342dfa5b97fc

IMA Classification of CrimsoniteHide

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Type description reference:

Kampf, A. R., Adams, P. M., Mills, S. J., Nash, B. P. (2016) Crimsonite, PbFe3+2(PO4)2(OH)2, the phosphate analogue of carminite from the Silver Coin mine, Valmy, Nevada, USA. Mineralogical Magazine, 80 (6) 925-935 doi:10.1180/minmag.2016.080.031

Classification of CrimsoniteHide

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8.BH.

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1

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 CrimsoniteHide

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Pronunciation:

Physical Properties of CrimsoniteHide

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Streak:

Light purplish orange

Cleavage:

Imperfect/Fair
likely on {101}

Fracture:

Irregular/Uneven, Splintery

Density:

5.180 g/cm3 (Calculated)

Optical Data of CrimsoniteHide

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RI values:

_n_α = 2.021 _n_β = 2.026 _n_γ = 2.032

δ = 0.011

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

Comments:

X light orange, Y light yellow, Z red brown

Comments:

Refractive indexes calculated from Gladstone-Dale relationship

Chemistry of CrimsoniteHide

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Mindat Formula:

PbFe3+2(PO4)2(OH)2

Common Impurities:

As,Ca,(S,Zn,V,Al,Cu)

Crystallography of CrimsoniteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 16.2535(13) Å, b = 7.4724(4) Å, c = 12.1533(9) Å

Ratio:

a:b:c = 2.175 : 1 : 1.626

Morphology:

Blades or plates flattened on {100}, up to 0.1 mm

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

From Type Description.

Geological EnvironmentHide

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Type Occurrence of CrimsoniteHide

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General Appearance of Type Material:

Subparallel aggregates of deep red blades or plates flattened on {100} and up to 0.1 mm in maximum dimension.

Place of Conservation of Type Material:

Type material is deposited in the collections of the Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, USA, catalogue number 65558

Geological Setting of Type Material:

A low-temperature secondary mineral

Associated Minerals at Type Locality:

Reference:

Kampf, A.R., Adams, P.M., Mills, S.J., Nash, B.P. (2016): Crimsonite, PbFe3+2(PO4)2(OH)2, the phosphate analogue of carminite from the Silver Coin mine, Valmy, Nevada, USA. Mineralogical Magazine: 80: 925-935.

Synonyms of CrimsoniteHide

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Relationship of Crimsonite to other SpeciesHide

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Other Members of this group:

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 CrimsoniteHide

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References for CrimsoniteHide

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Reference List:

Kampf, A. R., Adams, P. M., Mills, S. J., Nash, B. P. (2016) Crimsonite, PbFe3+2(PO4)2(OH)2, the phosphate analogue of carminite from the Silver Coin mine, Valmy, Nevada, USA. Mineralogical Magazine, 80 (6) 925-935 doi:10.1180/minmag.2016.080.031

Localities for CrimsoniteHide

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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.