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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 (negative)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
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
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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
Please feel free to link to this page.
Please feel free to link to this page.
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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