Canasite Mineral Data

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General Canasite Information

Chemical Formula:

(Na,K)6Ca5Si12O30(OH,F)4

Composition:

Molecular Weight = 1,257.57 gm

Potassium 6.22 % K 7.49 % K₂O

Sodium 7.31 % Na 9.86 % Na₂O

Calcium 15.93 % Ca 22.30 % CaO

Silicon 26.80 % Si 57.33 % SiO₂

Hydrogen 0.24 % H 2.15 % H₂O

Oxygen 41.98 % O

Fluorine 1.51 % F 1.51 % F

- % F -0.64 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₄K₂Ca₅Si₁₂O₃₀(OH)₃F

Environment:

In pegmatites in a differentiated alkalic massif (Khibiny massif, Russia); in charoitic rocks (Murun massif, Russia).

IMA Status:

Approved IMA 1959

Locality:

On Mts. Yukspor and Rasvumshorr, Khibiny massif, Kola Peninsula, and in the Murun massif, southwest of Olekminsk, Yakutia, Russia. Link to MinDat.org Location Data.

Name Origin:

For calcium, sodium, natrium, and silicon in the chemical composition.

Synonym:

ICSD 20109

PDF 13-553

Canasite Image

Images:

Canasite

Comments: Yellow translucent canasite grain with nepheline.
Location: Kirovskii Mine, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Canasite Crystallography

Axial Ratios:

a:b:c =2.6068:1:1.7406

Cell Dimensions:

a = 18.9, b = 7.25, c = 12.62, Z = 2; beta = 112° V = 1,603.34 Den(Calc)= 2.60

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.08(1), 1.641(0.8), 2.907(0.8),

Crystal Structure:

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Rastsvetaeva R K , Rozenberg K A , Khomyakov A P , Rozhdestvenskaya I V , Doklady Chemistry , 391 (2003) p.177-180, Crystal structure of F-canasite, Locality: Khibiny alkaline massif, Kola Peninsula, Russia

Physical Properties of Canasite

Cleavage:

{???} Perfect

Color:

Brownish yellow, Green yellow, Light green.

Density:

2.707

Diaphaneity:

Transparent to Translucent

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Canasite

Gladstone-Dale:

CI meas= 0.042 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2071,KPDmeas= 0.1989,KC= 0.2075
Ncalc = 1.54 - 1.56

Optical Data:

Biaxial (-), a=1.534, b=1.538, g=1.543, bire=0.0090, 2V(Calc)=84, 2V(Meas)=58.

Calculated Properties of Canasite

Electron Density:

Bulk Density (Electron Density)=2.59 gm/cc
note: Specific Gravity of Canasite =2.60 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Canasite= 3.73 barns/electron
U=PE_Canasite x r_electron= 9.66 barns/cc.

Radioactivity:

GRapi = 89.32 (Gamma Ray American Petroleum Institute Units)
Concentration of Canasite per GRapi unit = 1.12 (%)

Estimated Radioactivity from Canasite - barely detectable

Canasite Classification

Dana Class:

78.05.04.01 (78)Unclassified silicates

(78.05)possible phyllosilicates

(78.05.04)Dana Group

78.05.04.01 Canasite (Na,K)6Ca5Si12O30(OH,F)4 C 2/m 2/m

78.05.04.02 Fluorcanasite! K3Na3Ca5Si12O30F4•H2O Cm m

Strunz Class:

09.DG.80 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DG -Inosilicates with 3-periodic single and multiple chains

09.DG.80 Canasite (Na,K)6Ca5Si12O30(OH,F)4 C 2/m 2/m

09.DG.80 Fluorcanasite! K3Na3Ca5Si12O30F4•H2O Cm m

Other Canasite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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

Canasite

(Na,K)6Ca5Si12O30(OH,F)4
Dana No: 78.05.04.01 Strunz No: 09.DG.80
Locality:

Notes: