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.
Classification of Fluorowardite
Approved
Approval Year:
2012
Physical Properties of Fluorowardite
Vitreous, Pearly
Transparency:
Transparent, Translucent
Colour:
Colorless to white or cream-colored
Streak:
White
Hardness:
5 on Mohs scale
Comment:
about 5
Tenacity:
Brittle
Cleavage:
Perfect
on {001}
on {001}
Fracture:
Irregular/Uneven
Density:
2.760 g/cm3 (Calculated)
Optical Data of Fluorowardite
Type:
Uniaxial (+)
RI values:
nω = 1.576() 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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic
Chemical Properties of Fluorowardite
Formula:
NaAl3(PO4)2F2(OH)2(H2O)2
IMA Formula:
NaAl3(PO4)2(OH)2F2 · 2H2O
Crystallography of Fluorowardite
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
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.766 | (100) |
3.099 | (75) |
3.008 | (62) |
2.834 | (28) |
2.597 | (56) |
1.763 | (32) |
1.659 | (29) |
1.523 | (49) |
Type Occurrence of Fluorowardite
General Appearance of Type Material:
tetragonal-pyramidal crystals up to 0.1 mm
in diameter
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 Fluorowardite
Relationship of Fluorowardite to other Species
Member of:
Other Members of this group:
Cyrilovite | NaFe3+3(PO4)2(OH)4 · 2H2O | Tet. 4 2 2 : P41 21 2 |
Millisite | (Na,K)CaAl6(PO4)4(OH)9 · 3H2O | Tet. |
Wardite | NaAl3(PO4)2(OH)4 · 2H2O | Tet. 4 2 2 : P41 21 2 |
Fluorescence of Fluorowardite
none
Other Information
Health Risks:
References for Fluorowardite
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 Fluorowardite
mindat.org URL:
https://www.mindat.org/min-42790.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Fluorowardite
Locality List




All localities listed without proper references should be considered as questionable.
USA (TL) | |
| 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. |