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Fluorowardite

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Formula:
NaAl3(PO4)2F2(OH)2(H2O)2
Colour:
Colorless to white or cream-colored
Lustre:
Vitreous, Pearly
Hardness:
5
Specific Gravity:
2.760 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
For the mineral wardite and its fluorine content.
Fluorine analogue of wardite.


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Classification of FluorowarditeHide

Approved
Approval Year:
2012

Physical Properties of FluorowarditeHide

Vitreous, Pearly
Transparency:
Transparent, Translucent
Colour:
Colorless to white or cream-colored
Streak:
White
Hardness:
Comment:
about 5
Tenacity:
Brittle
Cleavage:
Perfect
on {001}
Fracture:
Irregular/Uneven
Density:
2.760 g/cm3 (Calculated)

Optical Data of FluorowarditeHide

Type:
Uniaxial (+)
RI values:
nω = 1.576(2) nε = 1.584(2)
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic

Chemical Properties of FluorowarditeHide

Formula:
NaAl3(PO4)2F2(OH)2(H2O)2
IMA Formula:
NaAl3(PO4)2(OH)2F2 · 2H2O

Crystallography of FluorowarditeHide

Crystal System:
Tetragonal
Class (H-M):
4 2 2 - Trapezohedral
Space Group:
P41 21 2
Setting:
P41 21 2
Cell Parameters:
a = 7.077(2) Å, c = 19.227(3) Å
Ratio:
a:c = 1 : 2.717
Unit Cell V:
962.8 ų
Z:
4
Morphology:
Tetragonal-pyramidal crystals

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0020022FluorowarditeKampf A R, Adams P M, Housley R M, Rossman G R (2014) Fluorowardite, NaAl3(PO4)2(OH)2F2*2H2O, the fluorine analog of wardite from the Silver Coin mine, Valmy, Nevada American Mineralogist 99 804-8102014Silver Coin mine, Valmy, Nevada, USA0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.766Å(100)
3.099Å(75)
3.008Å(62)
2.834Å(28)
2.597Å(56)
1.763Å(32)
1.659Å(29)
1.523Å(49)

Type Occurrence of FluorowarditeHide

General Appearance of Type Material:
tetragonal-pyramidal crystals up to 0.1 mm
in diameter
Place of Conservation of Type Material:
Mineral Sciences Department, Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue numbers 57659 and 63810
Geological Setting of Type Material:
a low-temperature secondary mineral in complex phosphate assemblages rich in Al, Na, and F.
Associated Minerals at Type Locality:

Synonyms of FluorowarditeHide

Relationship of Fluorowardite to other SpeciesHide

Member of:
Other Members of this group:
CyriloviteNaFe3+3(PO4)2(OH)4 · 2H2OTet. 4 2 2 : P41 21 2
Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2OTet.
WarditeNaAl3(PO4)2(OH)4 · 2H2OTet. 4 2 2 : P41 21 2

Fluorescence of FluorowarditeHide

Other InformationHide

Health Risks:

References for FluorowarditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Adams, P.M. and Housley, R.M. (2012): Fluorowardite, IMA 2012-016. CNMNC Newsletter No. 13, June 2012, page 816; Mineralogical Magazine, 76, 807-817.
Kampf, A.R., Adams, P.M., Housley, R.M., Rossman, G.R. (2014): Fluorowardite, NaAl3(PO4)2(OH)2F2·2H2O, the fluorine analogue of wardite from the Silver Coin mine, Valmy, Nevada. American Mineralogist, 99, 804-810.

Internet Links for FluorowarditeHide

Localities for FluorowarditeHide

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.
USA (TL)
 
  • Nevada
    • Humboldt Co.
      • Iron Point Mining District
        • Valmy
Kampf, A.R., Adams, P.M. and Housley, R.M. (2012): Fluorowardite, IMA 2012-016. CNMNC Newsletter No. 13, June 2012, page 816; Mineralogical Magazine, 76, 807-817; Kampf, A.R., Adams, P.M., Housley, R.M., Rossman, G.R. (2014): Fluorowardite, NaAl3(PO4)2(OH)2F2·2H2O, the fluorine analogue of wardite from the Silver Coin mine, Valmy, Nevada. American Mineralogist, 99, 804-810.
 
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