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Angarfite

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About AngarfiteHide

Formula:
NaFe3+5(PO4)4(OH)4·4H2O
Colour:
Orange-brown to red-brown
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.76
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.


Classification of AngarfiteHide

Approved
Approval Year:
2011

Pronounciation of AngarfiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of AngarfiteHide

Vitreous
Transparency:
Transparent
Colour:
Orange-brown to red-brown
Streak:
Pale brown
Hardness:
2½ on Mohs scale
Comment:
approximately
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
One poorly developed cleavage on {010}
Fracture:
Splintery
Density:
2.76(3) g/cm3 (Measured)    2.771 g/cm3 (Calculated)

Optical Data of AngarfiteHide

Type:
Biaxial (+)
RI values:
nα = 1.688(1) nβ = 1.696(1) nγ = 1.708(2)
2V:
Measured: 80° (3), Calculated: 79°
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
Strong r > v
Pleochroism:
Visible
Comments:
X is tan, Y, medium red-brown, and Z, dark red-brown, with X < Y < Z

Chemical Properties of AngarfiteHide

Formula:
NaFe3+5(PO4)4(OH)4·4H2O
IMA Formula:
NaFe3+5(PO4)4(OH)4 · 4H2O

Crystallography of AngarfiteHide

Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
C2 2 21
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.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.463 (43)
9.016 (100)
6.459 (42)
3.731 (27)
3.355 (51)
3.026 (29)
1.926 (33)
1.463 (36)

Type Occurrence of AngarfiteHide

General Appearance of Type Material:
Found on etched surfaces of triphylite, resulted from the reaction of Na-bearing hydrothermal solutions with primary triphylite.
Geological Setting of Type Material:
Granite pegmatite
Associated Minerals at Type Locality:

Synonyms of AngarfiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Triphylite1 photo of Angarfite associated with Triphylite on mindat.org.

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 AngarfiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Mills, S.J., Housley, R.M., Favreau, G. (2011) Angarfite, IMA 2010-082. CNMNC Newsletter No. 8, April 2011, page 294; Mineralogical Magazine: 75: 289-294.
Kampf, A.R., Mills, S.J., Housley, R.M., Favreau, G., Boulliard, J.-C., Bourgoin, V. (2012) Angarfite, a new mineral species from the Angarf-sud pegmatite, Morocco: description and crystal structure. Canadian Mineralogist: 50: 781-791.
Cámara, F., Gatta, G.D., Uvarova, Y., Gagne, O.C., Belakovskiy, D.I. (2014) New mineral names. American Mineralogist: 99: 1511-1518 .

Internet Links for AngarfiteHide

Localities for AngarfiteHide

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.
Morocco (TL)
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
Kampf, A.R., Mills, S.J., Housley, R.M., Favreau, G., Boulliard, J-C, and Bourgoin, V. (2012) Angarfite, a new mineral species from the Angarf-sud pegmatite, Morocco : description and crystal structure. The Canadian Mineralogist Vol. 50, pages 781-791. DOI 10.3749/canmin.50.4.781
Mineral and/or Locality  
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