Bonshtedtite Mineral Data

General Bonshtedtite Information

Chemical Formula:

Na3Fe++(PO4)(CO3)

Composition:

Molecular Weight = 279.80 gm

Sodium 24.65 % Na 33.23 % Na₂O

Iron 19.96 % Fe 25.68 % FeO

Phosphorus 11.07 % P 25.37 % P₂O₅

Carbon 4.29 % C 15.73 % CO₂

Oxygen 40.03 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₃Fe²⁺(PO₄)(CO₃)

Environment:

In veinlets associated with alkai-carbonate metasomatism of alkalic massifs.

IMA Status:

Approved IMA 1982

Locality:

Found in drill core from the Vuonnemiok River Valley, and on Mts. Suoluaiv, Kukisvumchorr, Partomchorr, and Rest'yun, Khibiny massif, also in drill core from the Kovdor massif, Kola Pe Link to MinDat.org Location Data.

Name Origin:

To honor Elsa Maksimilianovna Bonshtedt-Kupletskaya (1897-1974), Russian specialist in mineralogy of alkalic massifs.

Name Pronunciation:

Bonshtedtite + Pronunciation

Synonym:

ICSD 77053

PDF 35-678

Bonshtedtite Image

Images:

Bonshtedtite

Comments: Oriented gray bands of bonshtedtite in calcite.
Location: Kovdor Massif, Kola Peninsula. Scale: 3.9x2.3x1.5 cm.
© Richard Dale / Dale Minerals

Bonshtedtite Crystallography

Axial Ratios:

a:b:c =1.3453:1:0.7768

Cell Dimensions:

a = 8.921, b = 6.631, c = 5.151, Z = 2; beta = 90.417° V = 304.70 Den(Calc)= 3.05

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 3.318(1), 2.662(0.3), 8.923(0.2),

Physical Properties of Bonshtedtite

Cleavage:

{010} Perfect, {100} Perfect

Color:

Colorless, Rose, Yellowish, Greenish.

Density:

2.95 - 3.16, Average = 3.05

Diaphaneity:

Transparent

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Bonshtedtite

Gladstone-Dale:

CI meas= 0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.039 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1835,KPDmeas= 0.1832,KC= 0.191
Ncalc = 1.56 - 1.6

Optical Data:

Biaxial (-), a=1.52, b=1.568, g=1.591, bire=0.0710, 2V(Calc)=66, 2V(Meas)=68.

Calculated Properties of Bonshtedtite

Electron Density:

Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Bonshtedtite =3.05 gm/cc.

Fermion Index:

Fermion Index = 0.004895821
Boson Index = 0.995104179

Photoelectric:

PE_Bonshtedtite= 6.94 barns/electron
U=PE_Bonshtedtite x rElectron Density= 20.57 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bonshtedtite is Not Radioactive

Bonshtedtite Classification

Dana Class:

43.02.01.03 (43)Compound Phosphates, etc.

(43.02)(Anhydrous Normal Compound Anions)

(43.02.01)Bradleyite Group

43.02.01.01 Bradleyite Na3Mg(PO4)(CO3) P 2₁/m 2/m

43.02.01.02 Sidorenkite Na3Mn(PO4)(CO3) P 2₁/m 2/m

43.02.01.03 Bonshtedtite Na3Fe(PO4)(CO3) P 2₁/m 2/m

43.02.01.04 Crawfordite Na3Sr(PO4)(CO3) P 2₁ 2

Strunz Class:

05.BF.10 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BF -With (Cl), SO4, PO4, TeO3

05.BF.10 Bonshtedtite Na3Fe(PO4)(CO3) P 2₁/m 2/m

05.BF.10 Crawfordite Na3Sr(PO4)(CO3) P 2₁ 2

05.BF.10 Bradleyite Na3Mg(PO4)(CO3) P 2₁/m 2/m

05.BF.10 Sidorenkite Na3Mn(PO4)(CO3) P 2₁/m 2/m

Other Bonshtedtite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Bonshtedtite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Bonshtedtite

Na3Fe++(PO4)(CO3)
Dana No: 43.02.01.03 Strunz No: 05.BF.10
Locality:

Notes:

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