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 % Na2 O
Magnesium 4.99 % Mg 8.28 % MgO
Aluminum 13.85 % Al 26.18 % Al2 O3
Silicon 20.19 % Si 43.19 % SiO2
Hydrogen 2.28 % H 20.35 % H2 O
Oxygen 57.51 % O
______ ______
100.00 % 99.59 % = TOTAL OXIDE
Empirical Formula:
Na0.5 Al4 Mg2 Si7 AlO18 (OH)12 •5(H2 O)
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 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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PETosudite = 1.36 barns/electronU=PETosudite x r Electron 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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