Vergasovaite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Vergasovaite
Formula:
Cu3(SO4)(MoO4,SO4)O
Colour:
Olive-green
Lustre:
Vitreous
Hardness:
4 - 5½
Specific Gravity:
4.32 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor of Lidiya Pavlovna Vergasova (Лидия Павловна Вергасова) (b. 1941, USSR), of the Institute of Volcanology, Russian Academy of Sciences, Petropavlovsk, Russia.
Unique Identifiers
Mindat ID:
7352
Long-form identifier:
mindat:1:1:7352:9
IMA Classification of Vergasovaite
Approved
IMA Formula:
Cu2+3O(Mo6+O4)(S6+O4)
Approval year:
1998
First published:
1998
Classification of Vergasovaite
7.BB.30
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
B : With medium-sized cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
B : With medium-sized cations
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 |
|---|---|---|
| Vgs | 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 Vergasovaite
Vitreous
Transparency:
Transparent
Colour:
Olive-green
Streak:
Light yellow
Hardness:
4 - 5½ on Mohs scale
Hardness:
VHN25=302 - 413 kg/mm2 - Vickers
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
4.32 g/cm3 (Calculated)
Optical Data of Vergasovaite
Type:
Biaxial
RI values:
nα = 1.87 nγ = 1.98
Max. Birefringence:
δ = 0.110
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:
Very High (positive)
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
Dispersion:
strong
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 10.64% | 13.03% |
| 420nm | 10.39% | 12.62% |
| 440nm | 10.16% | 12.17% |
| 460nm | 9.95% | 11.86% |
| 470nm | 9.85% | 11.69% |
| 480nm | 9.8% | 11.61% |
| 500nm | 9.66% | 11.4% |
| 520nm | 9.55% | 11.22% |
| 540nm | 9.42% | 11.06% |
| 546nm | 9.4% | 11.01% |
| 560nm | 9.35% | 10.93% |
| 580nm | 9.26% | 10.78% |
| 589nm | 9.22% | 10.76% |
| 600nm | 9.11% | 10.63% |
| 620nm | 9.07% | 10.52% |
| 640nm | 9% | 10.48% |
| 650nm | 9% | 10.42% |
| 660nm | 9.03% | 10.45% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 13.03%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray
Internal Reflections:
Ubiquitous light green to white internal reflections
Pleochroism:
Visible
Comments:
Olive-green parallel to c; yellowish to brownish green ⊥ c.
Chemistry of Vergasovaite
Mindat Formula:
Cu3(SO4)(MoO4,SO4)O
Element Weights:
Elements listed:
Crystallography of Vergasovaite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 7.421(2) Å, b = 6.754(3) Å, c = 13.624(5) Å
Ratio:
a:b:c = 1.099 : 1 : 2.017
Unit Cell V:
682.85 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Stout prismatic crystals, slightly elongate on [001]. Forms include {100}, {110}, {120}, {130}, {111}, {263}, and {315}. Also as radiating aggregates.
Twinning:
None observed.
Comment:
Space Group: P nma.
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) |
|---|---|---|---|---|---|---|---|
| 0006764 | Vergasovaite | Berlepsch P, Armbruster T, Brugger J, Bykova E Y, Kartashov P M (1999) The crystal structure of vergasovaite Cu3O[(Mo,S)O4SO4], and its relation to synthetic Cu3O[MoO4]2 European Journal of Mineralogy 11 101-110 | 1999 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.077 Å | (100) |
| 3.391 Å | (60) |
| 3.342 Å | (60) |
| 2.542 Å | (60) |
| 2.500 Å | (60) |
| 2.275 Å | (60) |
| 3.71 Å | (30) |
Comments:
Treschina fumarole, Tolbachik volcano, Kamchatka Krai, Russia. The data are from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] | |
| 45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Vergasovaite
General Appearance of Type Material:
Olive-green intergrowths of stout prismatic crystals, slightly elongate on [001] and up to 0.3 mm long. It also occurs as radiating aggregates, to 0.6 mm.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia;
Natural History Museum, Basel, Switzerland.
Natural History Museum, Basel, Switzerland.
Geological Setting of Type Material:
Occurs on encrustations of sulfates in fumaroles.
Associated Minerals at Type Locality:
Synonyms of Vergasovaite
Other Language Names for Vergasovaite
Common Associates
Associations Based on Photo Data:
| 7 photos of Vergasovaite associated with Euchlorine | KNaCu3(SO4)3O |
Related Minerals - Strunz-mindat Grouping
| 7.BB. | Iskandarovite | Sb6O7(SO4)2 |
| 7.BB. | Brumadoite | Cu3(Te6+O4)(OH)4 · 5H2O |
| 7.BB. | Novikovite | (NH4)4Mo6+2Mo5+2O8(SO4)5 |
| 7.BB.10 | Hauckite | Fe3+3(Mg,Mn2+)24Zn18(SO4)4(CO3)2(OH)81 |
| 7.BB.15 | Antlerite | Cu3(SO4)(OH)4 |
| 7.BB.20 | Dolerophanite | Cu2(SO4)O |
| 7.BB.25 | Brochantite | Cu4(SO4)(OH)6 |
| 7.BB.25 | Ramaccioniite | Cu4[SeO4](OH)6 |
| 7.BB.30 | Cupromolybdite | Cu3O(MoO4)2 |
| 7.BB.35 | Klebelsbergite | Sb4O4(SO4)(OH)2 |
| 7.BB.35 | Tavagnascoite | Bi4O4(SO4)(OH)2 |
| 7.BB.40 | Schuetteite | Hg2+3O2(SO4) |
| 7.BB.45 | Paraotwayite | Ni(OH)2-x(SO4,CO3)0.5x |
| 7.BB.50 | Xocomecatlite | Cu3(TeO4)(OH)4 |
| 7.BB.55 | Pauflerite | (V4+O)SO4 |
| 7.BB.60 | Grandviewite | Cu3Al2(SO4)(OH)10 · H2O |
| 7.BB.65 | Timroseite | Pb2Cu5(TeO6)2(OH)2 |
| 7.BB.70 | Glikinite | Zn3O(SO4)2 |
| 7.BB.80 | Mojaveite | Cu6[Te6+O4(OH)2](OH)7Cl |
| 7.BB.85 | Paratimroseite | Pb2Cu4(TeO6)2(H2O)2 |
Fluorescence of Vergasovaite
Not fluorescent.
Other Information
IR Spectrum:
The IR spectrum shows no indication of OH and H2O.
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 Vergasovaite
mindat.org URL:
https://www.mindat.org/min-7352.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Vergasovaite
Localities for Vergasovaite
Showing 3 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.
Russia | |
| Pekov et al. (2012) |
| Bykova et al. (1998) |
| Zelenski et al. (2012) |
Quick NavTopAbout VergasovaiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Yadovitaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia