Aravaipaite
A valid IMA mineral species
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About Aravaipaite
Formula:
Pb3AlF9 · H2O
Colour:
Colourless
Lustre:
Vitreous, Pearly
Hardness:
2
Specific Gravity:
6.37 (Calculated)
Crystal System:
Triclinic
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).
See also Unnamed (Ba-analogue of Calcioaravaipaite).
Unique Identifiers
Mindat ID:
311
Long-form identifier:
mindat:1:1:311:9
GUID
(UUID V4):
(UUID V4):
32b20dc7-19fa-4ee9-ac71-16787537da6d
IMA Classification of Aravaipaite
Approved
Approval year:
1988
First published:
1989
Classification of Aravaipaite
3.BB.35
3 : HALIDES
B : Simple halides, with H2O
B : M:X = 1:2
3 : HALIDES
B : Simple halides, with H2O
B : M:X = 1:2
11.6.19.1
11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
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
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
8 : Halides of Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Avp | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Aravaipaite
Vitreous, Pearly
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
2 on Mohs scale
Tenacity:
Elastic
Cleavage:
Perfect
micaceous on {010}; good on {100}, {001}, {101}, {10_1}
micaceous on {010}; good on {100}, {001}, {101}, {10_1}
Fracture:
Irregular/Uneven
Density:
6.37 g/cm3 (Calculated)
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.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r < v, strong
Chemistry of Aravaipaite
Mindat Formula:
Pb3AlF9 · H2O
Crystallography of Aravaipaite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.842 Å, b = 25.2 Å, c = 5.652 Å
α = 93.84°, β = 90.14°, γ = 85.28°
α = 93.84°, β = 90.14°, γ = 85.28°
Ratio:
a:b:c = 0.232 : 1 : 0.224
Unit Cell V:
827.39 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Platy crystals, flattened on {010}.
Twinning:
polysynthetic on {010}, universal
Comment:
Originally thought to be monoclinic, P21/n, with a = 25.048(4), b = 5.8459(8), c = 5.6505(7) Å, β = 94.013(3)°. Kampf et al. (2011): "Twinning may be responsible for the original monoclinic cell or the two structures could be order-disorder (OD) polytypes."
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0002659 | Aravaipaite | Kampf A R (2001) The crystal structure of aravaipaite American Mineralogist 86 927-931 | 2001 | 0 | 293 | ||
0018320 | Aravaipaite | 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 | 2011 | Grand Reef mine, Aravaipa mining district, Arizona, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.134 Å | (100) |
12.5 Å | (80) |
3.65 Å | (70) |
3.50 Å | (60) |
3.33 Å | (60) |
2.916 Å | (40) |
2.822 Å | (40) |
Comments:
Recorded on material from the type locality
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47g : [Halogen-bearing surface weathering minerals] |
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, USA (No. 25414);
National Museum of Natural History, Washington, D.C., USA (No. 166058)
National Museum of Natural History, Washington, D.C., USA (No. 166058)
Geological Setting of Type Material:
oxidized zone of an epithermal Pb-Cu-Ag deposit hosted by a silicified rhyolite-schist breccia
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Dunn, P.J., 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.
Synonyms of Aravaipaite
Other Language Names for Aravaipaite
Related Minerals - Strunz-mindat Grouping
3.BB.05 | Eriochalcite | CuCl2 · 2H2O |
3.BB.10 | Rokühnite | FeCl2 · 2H2O |
3.BB.15 | Bischofite | MgCl2 · 6H2O |
3.BB.20 | Nickelbischofite | NiCl2 · 6H2O |
3.BB.25 | Sinjarite | CaCl2 · 2H2O |
3.BB.30 | Antarcticite | CaCl2 · 6H2O |
3.BB.35 | Tachyhydrite | CaMg2Cl6 · 12H2O |
3.BB.40 | Ghiaraite | CaCl2 · 4H2O |
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.
Internet Links for Aravaipaite
mindat.org URL:
https://www.mindat.org/min-311.html
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Please feel free to link to this page.
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References for Aravaipaite
Reference List:
Kampf, Anthony R., Dunn, Pete J., Foord, Eugene E. (1989) Grandreefite, pseudograndreefite, laurelite, and aravaipaite: Four new minerals from the Grand Reef mine, Graham County, Arizona. American Mineralogist, 74 (7-8) 927-933
Localities for Aravaipaite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Italy | |
| Russo et al. (2022) |
USA (TL) | |
| Min.Rec.: 27: 297. +2 other references |
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Grand Reef Mine, Laurel Canyon, Grand Reef Mountain, Klondyke, Aravaipa Mining District, Graham County, Arizona, USA