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
GUID
(UUID V4):
(UUID V4):
50238c99-2918-4e84-ab21-100e2980104a
IMA Classification of Calcioaravaipaite
Approved
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 |
---|---|---|
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
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:
Low
Dispersion:
r > v strong
Chemistry of Calcioaravaipaite
Mindat Formula:
PbCa2AlF9
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) |
---|---|---|---|---|---|---|---|
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 | ||
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 |
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:
Reference:
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.
Synonyms of Calcioaravaipaite
Other Language Names for Calcioaravaipaite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
3.AB. | Fluorocronite | PbF2 |
3.AB. | Manuelarossiite | PbCaAlF7 |
3.AB.05 | Tolbachite | CuCl2 |
3.AB.10 | Coccinite | HgI2 |
3.AB.15 | Sellaite | MgF2 |
3.AB.20 | Chloromagnesite | MgCl2 |
3.AB.20 | Lawrencite | (Fe2+,Ni)Cl2 |
3.AB.20 | Scacchite | MnCl2 |
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 | Gagarinite-(Ce) | Na(REExCa1-x)(REEyCa1-y)F6 |
3.AB.35 | Polezhaevaite-(Ce) | NaSrCeF6 |
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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External Links:
References for Calcioaravaipaite
Reference List:
Kampf, Anthony R., Merlino, Stefano, Pasero, Marco (2003) Order-disorder approach to calcioaravaipaite, [PbCa2Al(F,OH)9]: The crystal structure of the triclinic MDO polytype. American Mineralogist, 88 (2) 430-435 doi:10.2138/am-2003-2-319
Localities for Calcioaravaipaite
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 | |
| Campostrini et al. (2005) +1 other reference |
Campostrini et al. (2005) +1 other reference | |
| Campostrini et al. (2005) +1 other reference |
USA (TL) | |
| Foord et al. (1996) +1 other reference |
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Mount Vesuvius, Somma-Vesuvius Complex, Naples, Campania, Italy