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Revdite

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Formula:
Na16Si16O27(OH)26 · 28H2O
System:
Monoclinic
Colour:
Colourless, white
Hardness:
2
Name:
Named after its discovery locality.
This page provides mineralogical data about Revdite.

Classification of Revdite

Approved 1979
9.DM.30

9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
74.3.6.1

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
14.1.3

14 : Silicates not Containing Aluminum
1 : Silicates of the alkali metals
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Type Occurrence of Revdite

Physical Properties of Revdite

Vitreous, Pearly
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, white
Hardness (Mohs):
2
Cleavage:
Perfect
Perfect on {100}, less perfect on {010}
Density:
1.94 g/cm3 (Measured)    1.93 g/cm3 (Calculated)

Crystallography of Revdite

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
B2
Cell Parameters:
a = 5.383Å, b = 9.972Å, c = 6.91Å
β = 96.78°
Ratio:
a:b:c = 0.54 : 1 : 0.693
Unit Cell Volume:
V 368.33 ų (Calculated from Unit Cell)
Z:
2

Optical Data of Revdite

Type:
Biaxial (-)
RI values:
nα = 1.469 nβ = 1.482 nγ = 1.490
2V:
Measured: 75° , Calculated: 75°
Max Birefringence:
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak

Chemical Properties of Revdite

Formula:
Na16Si16O27(OH)26 · 28H2O
Essential elements:
All elements listed in formula:
Common Impurities:
K

Relationship of Revdite to other Species

9.DM.05StokesiteCaSn[Si3O9] · 2H2O
9.DM.10CalciohilairiteCaZr[SiO3]3 · 3H2O
9.DM.10HilairiteNa2Zr[SiO3]3 · 3H2O
9.DM.10KomkoviteBaZr[Si3O9] · 3H2O
9.DM.10Sazykinaite-(Y)Na5YZr[SiO3]6 · 6H2O
9.DM.10Pyatenkoite-(Y)Na5YTi[SiO3]6 · 6H2O
9.DM.15GaidonnayiteNa2Zr(Si3O9) · 2H2O
9.DM.15GeorgechaoiteNaKZr[Si3O9] · 2H2O
9.DM.20ChkaloviteNa2BeSi2O6
9.DM.25VlasoviteNa2ZrSi4O11
9.DM.35ScheuchzeriteNa(Mn,Mg,Zn)9[VSi9O28(OH)](OH)3
9.DM.40TerskiteNa4ZrSi6O16 · 2H2O
14.1.1NatrosiliteNa2Si2O5
14.1.2ErtixiiteNa2Si4O9
14.1.4MakatiteNa2Si4O8(OH)2 · 4H2O
14.1.5MagadiiteNa2Si14O29 · 11H2O
14.1.6KenyaiteNa2Si22O41(OH)8 · 6H2O
14.1.7GrumantiteNa(HSi2O5) · H2O
14.1.8SilinaiteNaLiSi2O5 · 2H2O

Other Names for Revdite

Name in Other Languages:
German:Revdit
Russian:Ревдит
Spanish:Revdita

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Revdite

Reference List:
Zap.Vses.Mineral.Obshch. 109, 565-569(1980) - American Mineralogist (1982): 67: 1076 [abstract]

American Mineralogist (1993): 78: 1112.

Internet Links for Revdite

Localities for Revdite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
No reference listed
Russia
 
  • Far-Eastern Region
    • Sakhalinskaya Oblast'
      • Kuril Islands
        • Paramushir Island
Bortnikova, S. B., Bessonova, E. P., & Zelenskii, M. E. (2005). Hydrogeochemistry of thermal springs at Ebeco volcano (Kuril Islands). In Proceedings World Geothermal Congress 2005. Antalia, Turkey, 24-29 April.
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
Am Min 79:1011
        • Lovozero Massif
[World of Stones 95:5-6, p64]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
          • Kedykverpakhk Mt
Mineralogical Record: 36(4): 397-416.
Mineral and/or Locality  
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