Angarfite (original) (raw)

A valid IMA mineral species

About AngarfiteHide

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Formula:

NaFe3+5(PO4)4(OH)4 · 4H2O

Colour:

Orange-brown to red-brown

Crystal System:

Orthorhombic

Name:

Named by A.R. Kampf, S.J. Mills, R.M. Housley, G. Favreau, J.-C. Boulliard, and V. Bourgoin in 2011 for the type locality of Angarf-South pegmatite, Morocco.

This page provides mineralogical data about Angarfite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:41909:1

e8c4a3ab-29c4-43a5-bdf7-933ccb24f184

IMA Classification of AngarfiteHide

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IMA Formula:

NaFe3+5(PO4)4(OH)4 · 4H2O

Classification of AngarfiteHide

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8.AC.

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations

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 AngarfiteHide

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Pronunciation:

Physical Properties of AngarfiteHide

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Colour:

Orange-brown to red-brown

Cleavage:

Poor/Indistinct
One poorly developed cleavage on {010}

Density:

2.76(3) g/cm3 (Measured) 2.771 g/cm3 (Calculated)

Optical Data of AngarfiteHide

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RI values:

_n_α = 1.688(1) _n_β = 1.696(1) _n_γ = 1.708(2)

2V:

Measured: 80° (3), Calculated: 79°

δ = 0.020

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

Optical Extinction:

X = b, Y = c, Z = a.

Comments:

X = tan; Y = medium red-brown; Z = dark red-brown.

Comments:

Absorption: X < Y < Z.

Chemistry of AngarfiteHide

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Mindat Formula:

NaFe3+5(PO4)4(OH)4 · 4H2O

Crystallography of AngarfiteHide

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Crystal System:

Orthorhombic

Class (H-M):

222 - Disphenoidal

Cell Parameters:

a = 12.7997(3) Å, b = 17.9081(4) Å, c = 8.2112(6) Å

Ratio:

a:b:c = 0.715 : 1 : 0.459

Unit Cell V:

1,882.16 ų (Calculated from Unit Cell)

Morphology:

Needles and prisms, elongate on {001}, with poorly formed chisel-like terminations.

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of AngarfiteHide

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General Appearance of Type Material:

Found on etched surfaces of triphylite, resulted from the reaction of Na-bearing hydrothermal solutions with primary triphylite.

Place of Conservation of Type Material:

Natural History Museum of Los Angeles County, California, USA (63428 and 63429).

Geological Setting of Type Material:

Associated Minerals at Type Locality:

Synonyms of AngarfiteHide

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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 AngarfiteHide

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References for AngarfiteHide

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Reference List:

Kampf, A. R., Mills, S. J., Housley, R. M., Favreau, G., Boulliard, J.-C., Bourgoin, V. (2012) Angarfite, NaFe3+5(PO4)4(OH)4·4H2O, a New Mineral Species from the Angarf-Sud Pegmatite, Morocco: Description and Crystal Structure. The Canadian Mineralogist, 50 (4) 781-791 doi:10.3749/canmin.50.4.781

Camara, F., Gatta, G. D., Uvarova, Y., Gagne, O. C., Belakovskiy, D. I. (2014) New Mineral Names,. American Mineralogist, 99 (7) 1511-1518 doi:10.2138/am.2014.646

Localities for AngarfiteHide

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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.

Morocco (TL)
Drâa-Tafilalet Region Ouarzazate Province Amerzgane Cercle Ouisselsate Caïdat ⓘ Angarf-South pegmatite (TL)	Williams et al. (2011) +1 other reference