Revdite Mineral Data

Revdite Mineral Data +

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General Revdite Information

Chemical Formula:

Na2Si2O5·5(H2O)

Composition:

Molecular Weight = 272.22 gm

Sodium 16.89 % Na 22.77 % Na₂O

Silicon 20.63 % Si 44.14 % SiO₂

Hydrogen 3.70 % H 33.09 % H₂O

Oxygen 58.77 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂(Si₂O₅)·5(H₂O)

IMA Status:

Approved IMA 1980

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 39603

PDF 33-1279

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Revdite Crystallography

Axial Ratios:

a:b:c =0.5398:1:0.6926

Cell Dimensions:

a = 5.383, b = 9.972, c = 6.907, Z = 2; beta = 96.78° V = 368.17 Den(Calc)= 2.46

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: C 2

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

By Intensity(I/I_o): 4.46(1), 13.37(0.76), 3.34(0.71),

Physical Properties of Revdite

Cleavage:

[100] Perfect, [010] Perfect

Color:

Colorless, White.

Density:

1.94

Diaphaniety:

Transparent

Hardness:

2 - Gypsum

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Revdite

Gladstone-Dale:

CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.211 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1953,KPDmeas= 0.2476,KC= 0.2476

Optical Data:

Biaxial (-), a=1.469, b=1.482, g=1.49, bire=0.0210, 2V(Calc)=74, 2V(Meas)=75.

Calculated Properties of Revdite

Electron Density:

r_electron=2.00 gm/cc
note: r_Revdite=1.94 gm/cc.

Fermion Index

Fermion Index = 0.00992
Boson Index = 0.99008

Photoelectric:

PE_Revdite= 1.14 barns/electron
U=PE_Revdite x r_electron= 2.28 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Revdite is Not Radioactive

Revdite Classification

Dana Class:

74.3.6.1 (74)Phyllosilicate Modulated Layers

(74.3)with joined strips

(74.3.6)Dana Group

74.3.6.1 Revdite Na2Si2O5·5(H2O) C 2 2

Strunz Class:

VIII/H.05-40 VIII - Silicates

VIII/H - Phyllosilicates (layered), Tetragonal or pseudotetragonal layered structures [Si4O10]4- and others

VIII/H.05 - Natrosilite - Revdite series

VIII/H.05-10 Natrosilite Na2Si2O5 P 2₁/a 2/m

VIII/H.05-30 Kanemite NaHSi2O5·3(H2O) P bcn 2/m 2/m 2/m

VIII/H.05-40 Revdite Na2Si2O5·5(H2O) C 2 2

Other Revdite Information

References:

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

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

Revdite

Na2Si2O5·5(H2O)
Dana No: 74.3.6.1 Strunz No: VIII/H.05-40
Locality:

Notes: