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Aravaipaite

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Formula:
Pb3AlF9 · H2O
System:
Triclinic
Colour:
Colourless
Hardness:
2
Name:
For the Aravaipa mining district, Arizona, USA, where the mineral occurs.
Closely related to Calcioaravaipaite which has dominant Ca and no water.

See also Unnamed (Ba-analogue of Calcioaravaipaite).

Classification of Aravaipaite

Approved 1988
3.DC.35

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
11.6.19.1

11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
8.8.19

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
8 : Halides of Pb
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Type Occurrence of Aravaipaite

General Appearance of Type Material:
platy crystals to 3 mm
Place of Conservation of Type Material:
National History Museum, Los Angeles, California (No. 25414);
National Museum of Natural History, Washington, D.C., USA (No. 166058)
Year of Discovery:
1988
Geological Setting of Type Material:
oxidized zone of an epithermal Pb-Cu-Ag deposit hosted by a silicified rhyolite-schist breccia

Physical Properties of Aravaipaite

Vitreous, Pearly
Diaphaneity (Transparency):
Transparent
Colour:
Colourless
Streak:
White
Hardness (Mohs):
2
Tenacity:
Elastic
Cleavage:
Perfect
micaceous on {010}; good on {100}, {001}, {101}, {10_1}
Fracture:
Irregular/Uneven
Density:
6.37 g/cm3 (Calculated)

Crystallography of Aravaipaite

Crystal System:
Triclinic
Cell Parameters:
a = 5.842Å, b = 25.2Å, c = 5.652Å
α = 93.84°, β = 90.14°, γ = 85.28°
Ratio:
a:b:c = 0.232 : 1 : 0.224
Z:
4
Morphology:
Platy crystals, flattened on {010}.
Twinning:
polysynthetic on {010}, universal
Comment:
Originally thought to be monoclinic, with monoclinic, P21/n, with a = 25.048(4), b = 5.8459(8), c = 5.6505(7) Å, β = 94.013(3)°..
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.134 (100)
12.5 (80)
3.65 (70)
3.50 (60)
3.33 (60)
2.916 (40)
2.822 (40)
Comments:
Recorded on material from the type locality

Optical Data of Aravaipaite

Type:
Biaxial (-)
RI values:
nα = 1.678 nβ = 1.690 nγ = 1.694
2V:
Measured: 70° to 73°, Calculated: 66°
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r < v, strong

Chemical Properties of Aravaipaite

Formula:
Pb3AlF9 · H2O
Essential elements:
All elements listed in formula:
Analytical Data:
Electron microprobe analysis of material from the type locality; water content estimated from the IR spectrum
Pb (73.8)
Al (3.6)
F (21.0)
H2O (3.0)

sum 101.4 wt.-%
Empirical Formula:
Pb2.90Al1.09F9 · 1.36H2O

Relationship of Aravaipaite to other Species

3.DC.05LaurionitePbCl(OH)
3.DC.05ParalaurionitePbCl(OH)
3.DC.10FiedleritePb3FCl4(OH) · H2O
3.DC.15PenfielditePb2Cl3(OH)
3.DC.20LaurelitePb7F12Cl2
3.DC.25Bismoclite(BiO)Cl
3.DC.25Daubréeite(BiO)(OH,Cl)
3.DC.25MatlockitePbFCl
3.DC.25RorisiteCaFCl
3.DC.25Zavaritskite(BiO)F
3.DC.25ZhangpeishaniteBaFCl
3.DC.30NadoritePbSbClO2
3.DC.30PeritePbBiClO2
3.DC.37CalcioaravaipaitePbCa2AlF9
3.DC.40ThorikositePb3Cl2(OH)(SbO3,AsO3)
3.DC.45MereheaditePb47Cl25(OH)13O24(CO3)(BO3)2
3.DC.50BlixitePb2(O,OH)2Cl
3.DC.55PinalitePb3WO5Cl2
3.DC.60SymesitePb10(SO4)O7Cl4 · H2O
3.DC.65EcdemitePb6Cl4(As2O7)
3.DC.65HeliophyllitePb6Cl4(As2O7)
3.DC.70MendipitePb3Cl2O2
3.DC.75DamaraitePb3Cl(OH)O2
3.DC.80OnoratoiteSb8Cl2O11
3.DC.85CotunnitePbCl2
3.DC.90PseudocotunniteK2PbCl4
3.DC.95BarstowitePb4Cl6(CO3) · H2O
8.8.1AbhuriteSn21Cl16(OH)14O6
8.8.2MatlockitePbFCl
8.8.3LaurelitePb7F12Cl2
8.8.4CotunnitePbCl2
8.8.5MendipitePb3Cl2O2
8.8.6DamaraitePb3Cl(OH)O2
8.8.7LaurionitePbCl(OH)
8.8.8ParalaurionitePbCl(OH)
8.8.9PenfielditePb2Cl3(OH)
8.8.10FiedleritePb3FCl4(OH) · H2O
8.8.11BlixitePb2(O,OH)2Cl
8.8.12PseudocotunniteK2PbCl4
8.8.13DiaboleitePb2CuCl2(OH)4
8.8.14PseudoboleitePb31Cu24Cl62(OH)48
8.8.15ChloroxiphitePb3CuO2Cl2(OH)2
8.8.17BideauxitePb2AgCl3(F,OH)2
8.8.18BoleiteKPb26Ag9Cu24(OH)48Cl62
8.8.20YedlinitePb6Cr3+Cl6(O,OH,H2O)8
8.8.21KolaritePbTeCl2
8.8.22HematophanitePb4Fe3O8(OH,Cl)

Other Names for Aravaipaite

Name in Other Languages:

Other Information

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 Aravaipaite

Reference List:
Kampf, A. R., Dunn, P. J. and Foord, E. E. (1989): Grandreefite, pseudograndreefite, laurelite, and aravaipaite: four new minerals from the Grand Reef mine, Graham County, Arizona. American Mineralogist 74, 927-933.

Kampf, A. R. and Foord, E. E. (1996): Calcioaravaipaite, a new mineral, and associated lead fluoride minerals from the Grand Reef mine, Graham County, Arizona. Mineralogical Record 27, 293-300.

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 20.

Kampf, A. R. (2001): The crystal structure of aravaipaite. American Mineralogist 86, 927-931.

Kampf, A.R., Yang, H., Downs, R.T., Pinch, W.W. (2011): The crystal structures and Raman spectra of aravaipaite and calcioaravaipaite. American Mineralogist, 96, 402-407.

Internet Links for Aravaipaite

Localities for Aravaipaite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
USA (TL)
 
  • Arizona
    • Graham Co.
      • Aravaipa District
        • Santa Teresa Mts
          • Klondyke
            • Grand Reef Mountain
              • Laurel Canyon
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 118; Kampf, A.R., et al (1989), Grandreefite, pseudograndreefite, laurelite, and aravaipaite: Four new minerals from the Grandreef mine, Graham Co., AZ, Am.Min.: 74: 927-933; Min.Rec.: 27: 297.
Mineral and/or Locality  
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