Revdite
A valid IMA mineral species
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About Revdite
Revda
Formula:
Na16Si16O27(OH)26 · 28H2O
Colour:
Colourless, white
Lustre:
Vitreous, Pearly
Hardness:
2
Specific Gravity:
1.94
Crystal System:
Monoclinic
Name:
Named after the mining town of Revda, Murmansk district, near the discovery locality.
This page provides mineralogical data about Revdite.
Unique Identifiers
Mindat ID:
3395
Long-form identifier:
mindat:1:1:3395:0
Similar Names
IMA Classification of Revdite
Approved
IMA Formula:
Na16Si16O27(OH)26·28H2O
Approval year:
1979
First published:
1980
Classification of Revdite
9.DM.30
9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
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
74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
14.1.3
14 : Silicates not Containing Aluminum
1 : Silicates of the alkali metals
14 : Silicates not Containing Aluminum
1 : Silicates of the alkali metals
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Rev | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Revdite
Vitreous, Pearly
Transparency:
Transparent
Colour:
Colourless, white
Hardness:
2 on Mohs scale
Cleavage:
Perfect
Perfect on {100}, less perfect on {010}
Perfect on {100}, less perfect on {010}
Density:
1.94 g/cm3 (Measured) 1.93 g/cm3 (Calculated)
Optical Data of Revdite
Type:
Biaxial (-)
RI values:
nα = 1.469 nβ = 1.482 nγ = 1.49
2V:
Measured: 75° , Calculated: 75°
Max. Birefringence:
δ = 0.021
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Dispersion:
relatively weak
Optical Extinction:
The YZ plane is nearly parallel to (100). Y ∧ c = 0°-10°.
Chemistry of Revdite
Mindat Formula:
Na16Si16O27(OH)26 · 28H2O
Element Weights:
Elements listed:
Common Impurities:
K
Crystallography of Revdite
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
B2
Cell Parameters:
a = 5.383 Å, b = 9.972 Å, c = 6.91 Å
β = 96.78°
β = 96.78°
Ratio:
a:b:c = 0.54 : 1 : 0.693
Unit Cell V:
368.33 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals prismatic, with sharply pointed terminations. As spherical fibrous aggregates and irregular rounded masses.
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0015591 | Revdite | Rastsvetaeva R K, Mikheeva M G, Yamnova N A, Pushcharovskii D Yu, Khomyakov A P (1992) Crystal structure of revdite Na16[Si4O6(OH)5]2[Si8O15(OH)6](OH)10*28H2O Soviet Physics Crystallography 37 632-636 | 1992 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.46 Å | (100) |
| 13.37 Å | (76) |
| 3.34 Å | (71) |
| 2.501 Å | (48) |
| 3.79 Å | (42) |
| 2.879 Å | (38) |
| 2.230 Å | (24) |
Comments:
Lovozero massif, Russia. The data are from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 9 : Lava/xenolith minerals (hornfels, sanidinite facies) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Revdite
General Appearance of Type Material:
Irregular rounded deposits up to 1-2 cm in diameter.
Place of Conservation of Type Material:
Geology Museum, Kola Branch, Academy of Sciences, Apatity, Russia, 5531.
Mining Institute, St. Petersburg, Russia, 1204/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 81394.
Mining Institute, St. Petersburg, Russia, 1204/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 81394.
Geological Setting of Type Material:
In ussingite veinlets cutting nepheline syenites.
Synonyms of Revdite
Other Language Names for Revdite
Common Associates
Associations Based on Photo Data:
| 2 photos of Revdite associated with Microcline | K(AlSi3O8) |
| 1 photo of Revdite associated with Manaksite | KNaMnSi4O10 |
| 1 photo of Revdite associated with Manganoneptunite | KNa2Li(Mn2+)2Ti2[Si4O12]2 |
Related Minerals - Strunz-mindat Grouping
| 9.DM. | Kesebolite-(Ce) | CeCa2Mn(AsO4)(SiO3)3 |
| 9.DM.05 | Stokesite | CaSn[Si3O9] · 2H2O |
| 9.DM.10 | Calciohilairite | CaZr[SiO3]3 · 3H2O |
| 9.DM.10 | Pyatenkoite-(Y) | Na5YTi[SiO3]6 · 6H2O |
| 9.DM.10 | Hilairite | Na2Zr[SiO3]3 · 3H2O |
| 9.DM.10 | Komkovite | BaZr[Si3O9] · 3H2O |
| 9.DM.10 | Sazykinaite-(Y) | Na5YZr[SiO3]6 · 6H2O |
| 9.DM.15 | Plumbogaidonnayite | PbZrSi3O9 · 2H2O |
| 9.DM.15 | Gaidonnayite | Na2Zr(Si3O9) · 2H2O |
| 9.DM.15 | Georgechaoite | NaKZr[Si3O9] · 2H2O |
| 9.DM.20 | Chkalovite | Na2BeSi2O6 |
| 9.DM.25 | Vlasovite | Na2ZrSi4O11 |
| 9.DM.35 | Scheuchzerite | Na(Mn,Mg,Zn)9[VSi9O28(OH)](OH)3 |
| 9.DM.40 | Terskite | Na4ZrSi6O16 · 2H2O |
| 9.DM.40 | Hydroterskite | Na2ZrSi6O12(OH)6 |
Other Information
IR Spectrum:
The IR spectrum shows molecular H2O.
Thermal Behaviour:
DTA curve shows endothermic breaks at 160° and 860° C (dehydration and fusion) and an exothermic effect at 520°.
Notes:
Dissolves slowly in room temperature water.
Dissolves quickly in cold dilute acids.
Dissolves quickly in cold dilute acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Revdite
mindat.org URL:
https://www.mindat.org/min-3395.html
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References for Revdite
Localities for Revdite
Showing 7 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Canada | |
| Horváth et al. (1990) +2 other references |
Russia (TL) | |
| [World of Stones 95:5-6 +3 other references |
| Pekov (2005) |
| Am Min 79:1011 | |
| Pekov I.V. et al. (2010) |
| Bortnikova et al. (2005) |
USA | |
| Gunnar Färber - Mineralienliste 1-2018 |
Quick NavTopAbout RevditeUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia