Stenonite Mineral Data

Stenonite Mineral Data +

General Stenonite Information

Chemical Formula:

(Sr,Ba,Na)2Al(CO3)F5

Composition:

Molecular Weight = 374.12 gm

Barium 22.02 % Ba 24.59 % BaO

Sodium 1.23 % Na 1.66 % Na₂O

Strontium 28.10 % Sr 33.24 % SrO

Aluminum 7.21 % Al 13.63 % Al₂O₃

Carbon 3.21 % C 11.76 % CO₂

Oxygen 12.83 % O

Fluorine 25.39 % F 25.39 % F

- % F -10.69 % -O=F₂

______ ______

100.00 % 99.57 % = TOTAL OXIDE

Empirical Formula:

Sr_1.2Ba_0.6Na_0.2Al(CO₃)F₅

IMA Status:

Approved IMA 1962

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 201803

PDF 15-366

Stenonite Image

Images:

Stenonite

Comments: White nearly opaque stenonite with minor pyrite grains.
Location: Ivigtut, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stenonite Crystallography

Axial Ratios:

a:b:c =0.6261:1:1.5107

Cell Dimensions:

a = 5.45, b = 8.704, c = 13.15, Z = 4; beta = 98.72° V = 616.58 Den(Calc)= 4.03

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

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

By Intensity(I/I_o): 2.166(1), 3.387(1), 1.925(0.8),

Crystal Structure:

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Hawthorne F C , The Canadian Mineralogist , 22 (1984) p.245-251, The crystal structure of stenonite and the classification of the, aluminofluoride minerals

Physical Properties of Stenonite

Cleavage:

[001] Good, [120] Good

Color:

Colorless, White.

Density:

3.86

Diaphaniety:

Transparent

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Stenonite

Gladstone-Dale:

CI meas= 0.114 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.151 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1255,KPDmeas= 0.131,KC= 0.1478

Optical Data:

Biaxial (-), a=1.452, b=1.527, g=1.538, bire=0.0860, 2V(Calc)=40, 2V(Meas)=43.

Calculated Properties of Stenonite

Electron Density:

r_electron=3.50 gm/cc
note: r_Stenonite=3.86 gm/cc.

Fermion Index

Fermion Index = 0.05933
Boson Index = 0.94067

Photoelectric:

PE_Stenonite= 130.68 barns/electron
U=PE_Stenonite x r_electron= 456.79 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stenonite is Not Radioactive

Stenonite Classification

Dana Class:

12.1.1.1 (12)Compound Halides

(12.1)with miscellaneous anions

(12.1.1)Dana Group

12.1.1.1 Stenonite (Sr,Ba,Na)2Al(CO3)F5 P 2₁/n 2/m

Strunz Class:

III/C.05-10 III - Halogenides

III/C - Double halogenides with water, Fluorides

III/C.05 - Stenonite - Boggildite series

III/C.05-10 Stenonite (Sr,Ba,Na)2Al(CO3)F5 P 2₁/n 2/m

III/C.05-20 Boggildite Sr2Na2Al2(PO4)F9 P 2₁/c 2/m

Other Stenonite 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 Stenonite :
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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Stenonite

(Sr,Ba,Na)2Al(CO3)F5
Dana No: 12.1.1.1 Strunz No: III/C.05-10
Locality:

Notes: