Boggildite Mineral Data

Boggildite Mineral Data +

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General Boggildite Information

Chemical Formula:

Sr2Na2Al2(PO4)F9

Composition:

Molecular Weight = 541.14 gm

Sodium 8.50 % Na 11.45 % Na₂O

Strontium 32.38 % Sr 38.30 % SrO

Aluminum 9.97 % Al 18.84 % Al₂O₃

Phosphorus 5.72 % P 13.12 % P₂O₅

Oxygen 11.83 % O

Fluorine 31.60 % F 31.60 % F

- % F -13.30 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Sr₂Na₂Al₂(PO₄)F₉

IMA Status:

Valid Species (Pre-IMA) 1954

Locality:

Link to MinDat.org Location Data.

Synonym:

Boeggildite

ICSD 201343

PDF 14-417

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Boggildite Crystallography

Axial Ratios:

a:b:c =0.5018:1:1.7753

Cell Dimensions:

a = 5.251, b = 10.464, c = 18.577, Z = 4; beta = 107.53° V = 973.34 Den(Calc)= 3.69

Crystal System:

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

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

By Intensity(I/I_o): 3.162(1), 3.893(0.8), 3.96(0.65),

Crystal Structure:

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Hawthorne F C , The Canadian Mineralogist , 20 (1982) p.263-270, The crystal structure of boggildite

Physical Properties of Boggildite

Color:

Red.

Density:

3.66

Hardness:

4-5 - Fluorite-Apatite

Streak:

white

Optical Properties of Boggildite

Gladstone-Dale:

CI meas= 0.18 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.187 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1262,KPDmeas= 0.1272,KC= 0.1551

Optical Data:

Biaxial (+), a=1.462, b=1.466, g=1.469, bire=0.0070, 2V(Calc)=80, 2V(Meas)=78-80.

Calculated Properties of Boggildite

Electron Density:

r_electron=3.41 gm/cc
note: r_Boggildite=3.66 gm/cc.

Fermion Index

Fermion Index = 0.02272
Boson Index = 0.97728

Photoelectric:

PE_Boggildite= 37.61 barns/electron
U=PE_Boggildite x r_electron= 128.20 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Boggildite is Not Radioactive

Boggildite Classification

Dana Class:

12.1.6.1 (12)Compound Halides

(12.1)with miscellaneous anions

(12.1.6)Dana Group

12.1.6.1 Boggildite Sr2Na2Al2(PO4)F9 P 2₁/c 2/m

Strunz Class:

III/C.05-20 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 Boggildite Information

References:

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

See Also:

Links to other databases for Boggildite :
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 Boggildite Specimen Label here :

Boggildite

Sr2Na2Al2(PO4)F9
Dana No: 12.1.6.1 Strunz No: III/C.05-20
Locality:

Notes: