Colquiriite Mineral Data

Colquiriite Mineral Data

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General Colquiriite Information

Chemical Formula:

CaLiAlF6

Composition:

Molecular Weight = 187.99 gm

Lithium 3.69 % Li 7.95 % Li₂O

Calcium 21.32 % Ca 29.83 % CaO

Aluminum 14.35 % Al 27.12 % Al₂O₃

Fluorine 60.64 % F 60.64 % F

- % F -25.53 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaLiAlF₆

Environment:

Rare accessory species in tin mine. Synthetic material used for laser crystals.

IMA Status:

Approved IMA 1980

Locality:

Colquiri mine, Colquiri, Bolivia Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Synonym:

ICSD 39699

PDF 33-794

Colquiriite Image

Images:

Colquiriite

Comments: Colorless tabular crystals of colquiriite on matrix.
Location: Serra Branca pegmatite, Pedra Lavrada, Picu?, Para?ba, Northeast Region, Brazil. Scale: Picture size 0.8 mm.
© Thomas Witzke / Abraxas-Verlag

Colquiriite Crystallography

Axial Ratios:

a:c = 1:1.92629

Cell Dimensions:

a = 5.02, c = 9.67, Z = 2; V = 211.04 Den(Calc)= 2.96

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3c

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

By Intensity(I/I_o): 3.23(1), 2.22(0.9), 1.736(0.8),

Physical Properties of Colquiriite

Cleavage:

None

Color:

White.

Density:

2.94

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

4 - Fluorite

Streak:

white

Optical Properties of Colquiriite

Gladstone-Dale:

CI meas= 0.234 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.239 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1306,KPDmeas= 0.1315,KC= 0.1717

Optical Data:

Uniaxial (-), e=1.385, w=1.388, bire=0.0030.

Calculated Properties of Colquiriite

Electron Density:

r_electron=2.82 gm/cc
note: r_Colquiriite=2.94 gm/cc.

Fermion Index

Fermion Index = 0.00305
Boson Index = 0.99695

Photoelectric:

PE_Colquiriite= 3.46 barns/electron
U=PE_Colquiriite x r_electron= 9.74 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Colquiriite is Not Radioactive

Colquiriite Classification

Dana Class:

11.6.3.1 (11)Halide Complexes; Alumino-fluorides

(11.6)with miscellaneous formulae

(11.6.3)Dana Group

11.6.3.1 Colquiriite CaLiAlF6 P 3c 3 2/m

Strunz Class:

III/B.03-20 III - Halogenides

III/B - Double halogenides without water, with [BF4]1-,[SiF6]2- and [AlF6]3-

III/B.03 - Kryolithionite - Calcjarlite series

III/B.03-10 Cryolithionite Na3Li3Al2F12 I a3d 4/m 3 2/m

III/B.03-20 Colquiriite CaLiAlF6 P 3c 3 2/m

III/B.03-25 Simmonsite! Na2LiAlF6 P 2₁/n 2/m

III/B.03-30 Cryolite Na3AlF6 P 2₁/n 2/m

III/B.03-40 Elpasolite K2NaAlF6 F m3m 4/m 3 2/m

III/B.03-45 Bogvadite Na2SrBa2Al4F20 Pnmn,Pn2n Ortho

III/B.03-48 Jorgensenite! Na2(Sr,Ba)14Na2Al12F64(OH,F) C 2/m 2/m

III/B.03-50 Jarlite Na(Sr,Na,[])7(Mg,[])Al6F32(OH,H2O)2 C 2/m 2/m

III/B.03-60 Calcjarlite Na(Ca,Sr)3Al3(F,OH)16 C 2/m 2/m

Other Colquiriite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Colquiriite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Colquiriite

CaLiAlF6
Dana No: 11.6.3.1 Strunz No: III/B.03-20
Locality:

Notes: