Chiolite Mineral Data

Chiolite Mineral Data

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General Chiolite Information

Chemical Formula:

Na5Al3F14

Composition:

Molecular Weight = 461.87 gm

Sodium 24.89 % Na 33.55 % Na₂O

Aluminum 17.53 % Al 33.11 % Al₂O₃

Fluorine 57.59 % F 57.59 % F

- % F -24.25 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₅Al₃F₁₄

IMA Status:

Valid Species (Pre-IMA) 1846

Locality:

Minask in the Ilmen Mountains, Russia. Link to MinDat.org Location Data.

Synonym:

ICSD 126419

PDF 30-1144

Chiolite Image

Images:

Chiolite

Comments: White translucent crystalline massive chiolite.
Location: Ivigtut, Arksukjiord, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Chiolite Crystallography

Axial Ratios:

a:c = 1:1.48322

Cell Dimensions:

a = 7.005, c = 10.39, Z = 2; V = 509.84 Den(Calc)= 3.01

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnc

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

By Intensity(I/I_o): 2.91(1), 5.18(0.8), 2.32(0.7),

Crystal Structure:

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Brosset C , Zeitschrift fur Anorganische und Allgemeine Chemie , 238 (1938) p.201-208, Die kristallstruktur des chioliths

Physical Properties of Chiolite

Cleavage:

[001] Perfect, [111] Distinct

Color:

Colorless, Snow white.

Density:

2.84 - 2.9, Average = 2.87

Diaphaniety:

Transparent

Habit:

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

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Chiolite

Gladstone-Dale:

CI meas= 0.245 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.28 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1148,KPDmeas= 0.1204,KC= 0.1594

Optical Data:

Uniaxial (-), e=1.342, w=1.349, bire=0.0070.

Calculated Properties of Chiolite

Electron Density:

r_electron=2.73 gm/cc
note: r_Chiolite=2.87 gm/cc.

Fermion Index

Fermion Index = 0
Boson Index = 1

Photoelectric:

PE_Chiolite= 1.19 barns/electron
U=PE_Chiolite x r_electron= 3.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chiolite is Not Radioactive

Chiolite Classification

Dana Class:

11.6.11.1 (11)Halide Complexes; Alumino-fluorides

(11.6)with miscellaneous formulae

(11.6.11)Dana Group

11.6.11.1 Chiolite Na5Al3F14 P 4/mnc 4/m 2/m 2/m

Strunz Class:

III/C.03-20 III - Halogenides

III/C - Double halogenides with water, Fluorides

III/C.03 - Prosopite - Boldyrevite series

III/C.03-10 Prosopite CaAL2(F,OH)8 A2/a 2/m

III/C.03-20 Chiolite Na5Al3F14 P 4/mnc 4/m 2/m 2/m

III/C.03-30 Weberite Na2MgAlF7 I mma 2/m 2/m 2/m

III/C.03-40 Usovite Ba2CaMgAl2F14 C 2/c or Cc Mono

III/C.03-45 Karasugite SrCaAl(F,OH)7 P 2₁/c 2/m

III/C.03-50 Carlhintzeite Ca2AlF7·(H2O) C1,C1 Tri

III/C.03-55 Rosenbergite AlF3·3(H2O) P 4/n 4/m

III/C.03-60 Ralstonite NaxMgxAl2-x(F,OH)6·(H2O) F d3m 4/m 3 2/m

III/C.03-70 Neighborite NaMgF3 Pcmn 2/m 2/m 2/m

III/C.03-80 Boldyrevite* NaCaMgAl3F14·4(H2O) None

Other Chiolite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Chiolite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Chiolite Specimen Label here :

Chiolite

Na5Al3F14
Dana No: 11.6.11.1 Strunz No: III/C.03-20
Locality:

Notes: