Tusionite Mineral Data

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

IMA Status:

Approved IMA 1983

Locality:

Link to MinDat.org Location Data.

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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Tusionite

Electron Density:

r_electron=4.32 gm/cc
note: r_Tusionite=4.73 gm/cc.

Fermion Index

Fermion Index = 0.08266
Boson Index = 0.91734

Photoelectric:

PE_Tusionite= 128.08 barns/electron
U=PE_Tusionite x r_electron= 553.25 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tusionite is Not Radioactive

Tusionite Classification

Dana Class:

24.3.3.2 (24)Borates - Anhydrous

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

(24.3.3)Dana Group

24.3.3.1 Nordenskioldine CaSnB2O6 R 3 3

24.3.3.2 Tusionite MnSn(BO3)2 R 3 3

Strunz Class:

V/G.02-20 V - Nitrates, Carbonates and Borates

V/G - "Insel" borates [BO3]3- "inseln"

V/G.02 - Nordenskiöldine - Tusionite series

V/G.02-10 Nordenskioldine CaSnB2O6 R 3 3

V/G.02-20 Tusionite MnSn(BO3)2 R 3 3

Other Tusionite 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 Tusionite :
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 Tusionite Specimen Label here :

Tusionite

MnSn++++(BO3)2
Dana No: 24.3.3.2 Strunz No: V/G.02-20
Locality:

Notes: