Tosudite Mineral Data

General Tosudite Information

Chemical Formula:

Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O)

Composition:

Molecular Weight = 973.76 gm

Sodium 1.18 % Na 1.59 % Na₂O

Magnesium 4.99 % Mg 8.28 % MgO

Aluminum 13.85 % Al 26.18 % Al₂O₃

Silicon 20.19 % Si 43.19 % SiO₂

Hydrogen 2.28 % H 20.35 % H₂O

Oxygen 57.51 % O

______ ______

100.00 % 99.59 % = TOTAL OXIDE

Empirical Formula:

Na_0.5Al₄Mg₂Si₇AlO₁₈(OH)₁₂•5(H₂O)

Environment:

Hydrothermal alteration product of tuffs, andesites, sediments, and so on.

IMA Status:

Approved IMA 1963

Locality:

Al-tosudite - Alushta, Crimea, Russia. Mg-tosudite - Kamakita mine, Aomori Prefecture, Japan. Li-tosudite - Himalaya pegmatite, San Diego County, Californina, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Toshio Sudo (1911-), Japanese mineralogist and crystallographer, University of Tokyo, Japan.

Name Pronunciation:

Tosudite

Synonym:

Alushtite

Chlorite

Tosudite Image

Images:

Tosudite

Comments: Fine grained massive tosudite.
Location: Takatama Mine, Fukushima, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tosudite Crystallography

Axial Ratios:

a:b:c =0.5617:1:3.3483

Cell Dimensions:

a = 5, b = 8.9, c = 29.8, Z = 2; V = 1,326.10 Den(Calc)= 2.44

Crystal System:

Orthorhombic Space Group: Unk

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

By Intensity(I/I_o): 4.53(1), 15(0.7), 4.97(0.45),

Physical Properties of Tosudite

Cleavage:

{001} Perfect

Color:

Azure, Blue white, Green, Yellow, White.

Density:

2.42

Habit:

Massive - Lamellar - Distinctly foliated fine-grained forms.

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Tosudite

Gladstone-Dale:

CI meas= -0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2414,KPDmeas= 0.2434,KC= 0.2328
Ncalc = 1.56 - 1.57

Optical Data:

Biaxial (-), a=1.542-1.564, b=1.57, g=1.548-1.74, bire=0.0060-0.1760

Calculated Properties of Tosudite

Electron Density:

Bulk Density (Electron Density)=2.48 gm/cc
note: Specific Gravity of Tosudite =2.44 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Tosudite= 1.36 barns/electron
U=PE_Tosudite x rElectron Density= 3.37 barns/cc.

Radioactivity:

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

Tosudite Classification

Dana Class:

71.04.02.04 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.04)interlayered 1:1, 2:1, and octahedra

(71.04.02)Interstratified Chlorite-Smectite group

71.04.02.01 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

71.04.02.02 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono

71.04.02.03 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m

71.04.02.04 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O) Unk Ortho

71.04.02.05 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10•n(H2O) Unk Ortho

71.04.02.06 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono

71.04.02.07 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4•2(H2O) Unk Mono

71.04.02.08 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2•n(H2O) Unk Mono

71.04.02.09 Glagolevite! NaMg6[Si3AlO10](OH,O)8•H2O C1 1

Strunz Class:

09.EC.60 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.60 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2•n(H2O) Unk Mono

09.EC.60 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

09.EC.60 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10•n(H2O) Unk Ortho

09.EC.60 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono

09.EC.60 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono

09.EC.60 Illite* (K,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)] C 2/m 2/m

09.EC.60 Hydrobiotite [K(Mg,Fe)3(Al,Fe)Si3O10(OH,F)2]•[(Mg,Fe,Al)3(Si,Al)4O10(OH)2•4(H2O)] C 2/m 2/m

09.EC.60 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono

09.EC.60 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4•2(H2O) Unk Mono

09.EC.60 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m

09.EC.60 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O) Unk Ortho

09.EC.60 Brinrobertsite! (Na,K,Ca)x(Al,Fe,Mg)4(Si,Al)8O20(OH)4•3.54(H2O)[x=0.35,n=3.54] pseudo 2/m 2/m

Other Tosudite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Tosudite :
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

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Tosudite

Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O)
Dana No: 71.04.02.04 Strunz No: 09.EC.60
Locality:

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