Calcioaravaipaite
A valid IMA mineral species
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About Calcioaravaipaite
Formula:
PbCa2AlF9
Colour:
colorless to white
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
4.85
Crystal System:
Triclinic
Name:
Named in allusion to its relationship as the CALCIum analogue of Aravaipaite.
Closely related to Aravaipaite (which is Pb-dominant and contains an additional water molecule).
Chemically and structurally related to manuelarossiite.
See also Unnamed (Ba-analogue of Calcioaravaipaite).
Chemically and structurally related to manuelarossiite.
See also Unnamed (Ba-analogue of Calcioaravaipaite).
Unique Identifiers
Mindat ID:
829
Long-form identifier:
mindat:1:1:829:3
IMA Classification of Calcioaravaipaite
Approved
IMA Formula:
Pb2+Ca2AlF9
Approval year:
1994
Classification of Calcioaravaipaite
3.AB.37
3 : HALIDES
A : Simple halides, without H2O
B : M:X = 1:2
3 : HALIDES
A : Simple halides, without H2O
B : M:X = 1:2
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 for Standard |
|---|---|---|
| Cavp | 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 Calcioaravaipaite
Vitreous
Transparency:
Transparent
Colour:
Colorless to white
Streak:
White
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on the {100}
Good on the {100}
Fracture:
Conchoidal
Density:
4.85(5) g/cm3 (Measured) 4.71 g/cm3 (Calculated)
Optical Data of Calcioaravaipaite
Type:
Biaxial (-)
RI values:
nα = 1.510 nβ = 1.528 nγ = 1.531
2V:
Measured: 36° , Calculated: 44°
Max. Birefringence:
δ = 0.021
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Dispersion:
r > v strong
Chemistry of Calcioaravaipaite
Mindat Formula:
PbCa2AlF9
Element Weights:
Elements listed:
Crystallography of Calcioaravaipaite
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 5.3815(3) Å, b = 5.3846(3) Å, c = 12.2034(6) Å
α = 91.362(2)°, β = 101.110(3)°, γ = 91.525(3)°
α = 91.362(2)°, β = 101.110(3)°, γ = 91.525(3)°
Ratio:
a:b:c = 0.999 : 1 : 2.266
Unit Cell V:
346.72 ų
Z:
2
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) |
|---|---|---|---|---|---|---|---|
| 0018321 | Calcioaravaipaite | 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 | |
| 0002987 | Calcioaravaipaite | Kampf A R, Merlino S, Pasero M (2003) Order-disorder approach to calcioaravaipaite, [PbCa2Al(F,OH)9]: The crystal structure of the triclinic MDO polytype American Mineralogist 88 430-435 |  | 2003 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.9 Å | (100) |
| 3.71 Å | (70) |
| 3.51 Å | (85) |
| 2.981 Å | (60) |
| 2.943 Å | (60) |
| 2.028 Å | (60) |
| 1.971 Å | (60) |
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 |
| 45b : [Other oxidized fumarolic minerals] | |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Calcioaravaipaite
Place of Conservation of Type Material:
Natural History Museum, Los Angeles, California, USA, 39338
Geological Setting of Type Material:
oxidized zone of an epithermal Cu–Pb–Ag deposit
Associated Minerals at Type Locality:
Synonyms of Calcioaravaipaite
Other Language Names for Calcioaravaipaite
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 3.AB. | Manuelarossiite | PbCaAlF7 |
| 3.AB. | Fluorocronite | PbF2 |
| 3.AB.05 | Tolbachite | CuCl2 |
| 3.AB.10 | Coccinite | HgI2 |
| 3.AB.15 | Sellaite | MgF2 |
| 3.AB.20 | Lawrencite | (Fe2+,Ni)Cl2 |
| 3.AB.20 | Scacchite | MnCl2 |
| 3.AB.20 | Chloromagnesite | MgCl2 |
| 3.AB.25 | Fluorite | CaF2 |
| 3.AB.25 | Frankdicksonite | BaF2 |
| 3.AB.25 | Strontiofluorite | SrF2 |
| 3.AB.30 | Tveitite-(Y) | (Y, Na)6Ca6Ca6(Ca,Na)F42 |
| 3.AB.35 | Gagarinite-(Y) | NaCaYF6 |
| 3.AB.35 | Polezhaevaite-(Ce) | NaSrCeF6 |
| 3.AB.35 | Gagarinite-(Ce) | Na(REExCa1-x)(REEyCa1-y)F6 |
| 3.AB.85 | Cotunnite | PbCl2 |
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 Calcioaravaipaite
mindat.org URL:
https://www.mindat.org/min-829.html
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References for Calcioaravaipaite
Localities for Calcioaravaipaite
Showing 6 localities.
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The 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).
All localities listed without proper references should be considered as questionable.
Italy | |
| Campostrini et al. (2005) +1 other reference |
| Campostrini et al. (2005) +1 other reference |
| Kasatkin et al. (2023) |
| Campostrini et al. (2005) +1 other reference | |
| Marco E. Ciriotti et al. (2025) |
USA (TL) | |
| Foord et al. (1996) +1 other reference |
Quick NavTopAbout CalcioaravaipaiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Mount Vesuvius, Metropolitan City of Naples, Campania, Italy