Calcioaravaipaite Mineral Data

Calcioaravaipaite Mineral Data +

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General Calcioaravaipaite Information

Chemical Formula:

PbCa2Al(F,OH)9

Composition:

Molecular Weight = 483.33 gm

Calcium 16.58 % Ca 23.20 % CaO

Aluminum 5.58 % Al 10.55 % Al₂O₃

Hydrogen 0.21 % H 1.86 % H₂O

Lead 42.87 % Pb 46.18 % PbO

Oxygen 3.31 % O

Fluorine 31.45 % F 31.45 % F

- % F -13.24 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbCa₂AlF₈(OH)

Environment:

In a small epithermal lead-copper-silver deposit in a silicified breccia.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

The Grand Reef mine in Laurel Canyon, about 6 km northeast of Klondyke, Aravaipa mining district, Graham County, Arizona. USA. Link to MinDat.org Location Data.

Name Origin:

For the relationship with aravaipaite

Synonym:

IMA1994-018

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Calcioaravaipaite Crystallography

Axial Ratios:

a:b:c =1.0274:1:1.624

Cell Dimensions:

a = 7.722, b = 7.516, c = 12.206, Z = 4; alpha = 98.86°, beta = 96.91°, gamma = 90° V = 694.88 Den(Calc)= 4.62

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: C1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 11.9(1), 3.81(0.85), 3.71(0.7),2.981(0.6),

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Crystal Structure:

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Kampf A R , Merlino S , Pasero M , American Mineralogist , 88 (2003) p.430-435, Order-disorder approach to calcioaravaipaite, [PbCa2Al(F,OH)9]:, The crystal structure of the triclinic MDO polytype

Physical Properties of Calcioaravaipaite

Cleavage:

[100] Good

Color:

Colorless, Milk white.

Density:

4.85

Diaphaniety:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Calcioaravaipaite

Gladstone-Dale:

CI meas= 0.296 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.261 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1132,KPDmeas= 0.1078,KC= 0.1531

Optical Data:

Biaxial (-), a=1.51, b=1.528, g=1.531, bire=0.0210, 2V(Calc)=44, 2V(Meas)=36. Dispersion r > v strong.

Calculated Properties of Calcioaravaipaite

Electron Density:

r_electron=4.13 gm/cc
note: r_{Calcioaravaipaite}=4.62 gm/cc.

Fermion Index

Fermion Index = 0.09498
Boson Index = 0.90502

Photoelectric:

PE_{Calcioaravaipaite}= 738.89 barns/electron
U=PE_{Calcioaravaipaite} x r_electron=3,051.13 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Calcioaravaipaite is Not Radioactive

Calcioaravaipaite Classification

Dana Class:

11.6.22.1 (11)Halide Complexes; Alumino-fluorides

(11.6)with miscellaneous formulae

(11.6.22)Dana Group

11.6.22.1 Calcioaravaipaite ! PbCa2Al(F,OH)9 C1 1

Strunz Class:

III/C.04-20 III - Halogenides

III/C - Double halogenides with water, Fluorides

III/C.04 - Aravaipaite - Calcioaravaipaite series

III/C.04-10 Aravaipaite Pb3AlF9·(H2O) P 2₁/m 2/m

III/C.04-20 Calcioaravaipaite PbCa2Al(F,OH)9 C1 1

Other Calcioaravaipaite Information

References:

NAME( AmMin, V 38, No. 3) PHYS. PROP.(Am.Min.,Vol.88, p 430) OPTIC PROP.(Am.Min.,Vol.82,p207,1997)

See Also:

Links to other databases for Calcioaravaipaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Calcioaravaipaite

PbCa2Al(F,OH)9
Dana No: 11.6.22.1 Strunz No: III/C.04-20
Locality:

Notes: