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Calcioaravaipaite

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Big Photo

Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy
© L.C. 2011




Formula:
PbCa
 
2
AlF
 
9
System:TriclinicColour:colorless to white
Hardness:2½
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).

See also Unnamed (Ba-analogue of Calcioaravaipaite).

Classification of Calcioaravaipaite

IMA status:Approved 1994
Strunz 8th edition ID:3/C.04-20
Nickel-Strunz 10th (pending) edition ID:3.DC.37

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

Type Locality:Grand Reef Mine (Aravaipa Mine; Lead Jewel; Joe Rubal Mine; Vivian Mine; Calistoga Mining & Development Co. Mine; Bringham Silver and Lead Mine), Laurel Canyon, Grand Reef Mountain, Klondyke, Santa Teresa Mts, Aravaipa District, Graham Co., Arizona, USA

Physical Properties of Calcioaravaipaite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:colorless to white
Streak:white
Hardness (Mohs):2½
Cleavage:Distinct/Good
Good on the {100}
Fracture:Conchoidal
Density (measured):4.85 g/cm3
Density (calculated):4.62 g/cm3

Crystallography of Calcioaravaipaite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Cell Parameters:a = 7.72Å, b = 7.51Å, c = 12.2Å
α = 98.86°, β = 96.91°, γ = 90°
Ratio:a:b:c = 1.028 : 1 : 1.625
Unit Cell Volume:V 694.88 ų
X-Ray Powder Diffraction:
d-spacingIntensity
11.9 (100)
3.71 (70)
3.51 (85)
2.981 (60)
2.943 (60)
2.028 (60)
1.971 (60)

Optical Data of Calcioaravaipaite

Type:Biaxial (-)
RI values: nα = 1.510 nβ = 1.528 nγ = 1.531
2V:Measured: 36° , Calculated: 44°
Maximum Birefringence:δ = 0.021

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:r > v strong

Chemical Properties of Calcioaravaipaite

Formula:
PbCa
 
2
AlF
 
9
Essential elements:Al, Ca, F, Pb
All elements listed in formula:Al, Ca, F, Pb

Relationship of Calcioaravaipaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.DC.05Laurionite
PbCl(OH)
3.DC.05Paralaurionite
PbCl(OH)
3.DC.10Fiedlerite
Pb
 
3
FCl
 
4
(OH) · H
 
2
O
3.DC.15Penfieldite
Pb
 
2
Cl
 
3
(OH)
3.DC.20Laurelite
Pb
 
7
F
 
12
Cl
 
2
3.DC.25Bismoclite
(BiO)Cl
3.DC.25Daubréeite
(BiO)(OH,Cl)
3.DC.25Matlockite
PbFCl
3.DC.25Rorisite
CaFCl
3.DC.25Zavaritskite
(BiO)F
3.DC.25Zhangpeishanite
BaFCl
3.DC.30Nadorite
PbSbClO
 
2
3.DC.30Perite
PbBiClO
 
2
3.DC.35Aravaipaite
Pb
 
3
F
 
3
[AlF
 
6
] · H
 
2
O
3.DC.40Thorikosite
Pb
 
3
Cl
 
2
(OH)(SbO
 
3
,AsO
 
3
)
3.DC.45Mereheadite
Pb
 
47
Cl
 
25
(OH)
 
13
O
 
24
(CO
 
3
)(BO
 
3
)
 
2
3.DC.50Blixite
Pb
 
2
(O,OH)
 
2
Cl
3.DC.55Pinalite
Pb
 
3
WO
 
5
Cl
 
2
3.DC.60Symesite
Pb
 
10
(SO
 
4
)O
 
7
Cl
 
4
 · H
 
2
O
3.DC.65Ecdemite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
3.DC.65Heliophyllite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
3.DC.70Mendipite
Pb
 
3
Cl
 
2
O
 
2
3.DC.75Damaraite
Pb
 
3
Cl(OH)O
 
2
3.DC.80Onoratoite
Sb
 
8
Cl
 
2
O
 
11
3.DC.85Cotunnite
PbCl
 
2
3.DC.90Pseudocotunnite
K
 
2
PbCl
 
4
3.DC.95Barstowite
Pb
 
4
Cl
 
6
(CO
 
3
) · H
 
2
O

Other Names for Calcioaravaipaite

Synonyms:
IMA1994-018
Other Languages:
German:Calcioaravaipait
Russian:Кальциоаравайпаит
Spanish:Calcioaravaipaita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Calcioaravaipaite

Reference List:

- +
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.

Mineralogical Record: 28: 220.

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.

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 Calcioaravaipaite

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  • Raman and XRD data at RRUFF project
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  • Calcioaravaipaite details from Handbook of Mineralogy (PDF)
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    • Localities for Calcioaravaipaite

    The 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.
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    (TL) indicates type locality. ? 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.
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
    		Campostrini, I., Gramaccioli, C. (2005): Artroeite del Monte Somma-Vesuvio: secondo ritrovamento mondiale. Riv. Mineral. Ital., 29, 1: 50-52. ; M. Russo & I. Campostrini (2011): Ammineite, matlockite and post 1944 eruption fumarolic minerals at Vesuvius. Plinius 37, 312.
    USA
     
    • Arizona
      • Graham Co.
        • Aravaipa District
          • Santa Teresa Mts
            • Klondyke
              • Grand Reef Mountain
                • Laurel Canyon
    		Kampf, A.R. & E.E. Foord (1996), Calcioaravaipaite a new mineral and associated lead fluoride minerals from the Grand Reef Mine, Graham County, Arizona. Mineralogical Record: 27: 293-300; Grant, Raymond W., Richard A. Bideaux & Sidney A. Williams (2006), Minerals Added to the Arizona List 1995 to 2005: 3.
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