Tusionite Mineral Data

General Tusionite Information

Chemical Formula:

MnSn++++(BO3)2

Composition:

Molecular Weight = 291.26 gm

Manganese 18.86 % Mn 24.35 % MnO

Tin 40.76 % Sn 51.74 % SnO₂

Boron 7.42 % B 23.90 % B₂O₃

Oxygen 32.96 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺Sn(BO₃)₂

Environment:

Late-stage hydrothermal origin, rare in granite pegmatites, typically in miarolitic cavities.

IMA Status:

Approved IMA 1983

Locality:

Upper Tusion River, Shakhdara Range, southwestern Pamir Mountains, Tadjikistan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Tusionite + Pronunciation

Synonym:

ICSD 39625

PDF 35-727

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Tusionite Crystallography

Axial Ratios:

a:c = 1:3.19615

Cell Dimensions:

a = 4.787, c = 15.3, Z = 3; V = 303.63 Den(Calc)= 4.78

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 2.818(1), 3.65(0.9), 1.744(0.8),

Crystal Structure:

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Cooper M A , Hawthorne F C , Novak M , The Canadian Mineralogist , 32 (1994) p.903-907, The crystal structure of tusionite, MnSn(BO3)2,, a dolomite-structure borate

Physical Properties of Tusionite

Cleavage:

{001} Perfect

Color:

Colorless, Yellow brown, Light yellow.

Density:

4.73

Diaphaneity:

Transparent to Translucent

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Tusionite

Gladstone-Dale:

CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.168,KPDmeas= 0.1698,KC= 0.1734
Ncalc = 1.82 - 1.83

Optical Data:

Uniaxial (-), e=1.752, w=1.854, bire=0.1020.

Calculated Properties of Tusionite

Electron Density:

Bulk Density (Electron Density)=4.32 gm/cc
note: Specific Gravity of Tusionite =4.73 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Tusionite= 128.08 barns/electron
U=PE_Tusionite x rElectron Density= 553.25 barns/cc.

Radioactivity:

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

Tusionite Classification

Dana Class:

24.03.03.02 (24)Borates - Anhydrous

(24.03)where (A)m (B)n [XO3]p

(24.03.03)Dana Group

24.03.03.01 Nordenskioldine CaSnB2O6 R 3 3

24.03.03.02 Tusionite MnSn(BO3)2 R 3 3

Strunz Class:

06.AA.15 06 - BORATES

06.A - Monoborates

06.AA -BO3, without additional anions; 1(D)

06.AA.15 Nordenskioldine CaSnB2O6 R 3 3

06.AA.15 Tusionite MnSn(BO3)2 R 3 3

Other Tusionite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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

Tusionite

MnSn++++(BO3)2
Dana No: 24.03.03.02 Strunz No: 06.AA.15
Locality:

Notes: