Ryabchikovite (original) (raw)
A valid IMA mineral species
Colour:
Light brown to reddish-brown
Crystal System:
Monoclinic
Name:
Named in honor of Igor Dmitrievich Ryabchikov (Игорь Дмитриевич Рябчиков) (5 September 1937, Moscow , USSR – 27 November 2017), Russian geochemist, petrologist, and professor at the Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences (IGEM RAS), Moscow. He made significant contributions in areas related to magmatic rocks and systems.
The first pyroxene with Cu as an essential component. The Cu analogue of diopside. Second silicate mineral with Cu and Mg as essential cations after cyprine.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:55453:4
2c4bbad4-aec8-4e5e-8f5e-1a96a9ba44f0
IMA Classification of RyabchikoviteHide
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Type description reference:
Shchipalkina, Nadezhda V., Vereshchagin, Oleg S., Pekov, Igor V., Belakovskiy, Dmitry I., Koshlyakova, Natalia N., Shilovskikh, Vladimir V., Pankin, Dmitriy V., Britvin, Sergey N., Sandalov, Fedor D., Sidorov, Evgeny G. (2023) Ryabchikovite, CuMg(Si2O6), a new pyroxene group mineral, and some genetic features of natural anhydrous copper silicates. American Mineralogist, 108 (7) 1399-1408 doi:10.2138/am-2022-8620
Classification of RyabchikoviteHide
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9.DA.
9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Ryb | 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 RyabchikoviteHide
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Colour:
Light brown to reddish-brown
Optical Data of RyabchikoviteHide
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RI values:
_n_α = 1.685(5) _n_β = 1.690(5) _n_γ = 1.703(4)
2V:
Measured: 60° (15), Calculated: 64°
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
None observed.
Optical Extinction:
Z ∧ c = 47° (where [001] is considered to be parallel to [001] of the underlying diopside crystal of the type material).
Pleochroism:
Non-pleochroic
Chemistry of RyabchikoviteHide
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Chemical AnalysisHide
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Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Mg1.05Cu0.78Zn0.06Fe3+0.06Ca0.03)(Si1.96Al0.04O6) |
Crystallography of RyabchikoviteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 9.731(9) Å, b = 8.929(8) Å, c = 5.221(4) Å
β = 110.00(6)°
Ratio:
a:b:c = 1.09 : 1 : 0.585
Unit Cell V:
426.28 ų (Calculated from Unit Cell)
Epitaxial Relationships of RyabchikoviteHide
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X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.403 Å | (38) |
| 4.307 Å | (27) |
| 3.746 Å | (32) |
| 3.291 Å | (27) |
| 3.177 Å | (100) |
| 2.876 Å | (75) |
| 2.456 Å | (26) |
| 2.215 Å | (26) |
Type Occurrence of RyabchikoviteHide
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General Appearance of Type Material:
Thin (25 μm max, typically < 10 μm) epitactic crusts on well-formed prismatic diopside crystals.
Place of Conservation of Type Material:
Collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5642/1.
Geological Setting of Type Material:
Fumarole, at temperatures higher than 400–450ºC, likely due to an interaction between Cu-bearing fumarolic gas and earlier formed diopside.
Associated Minerals at Type Locality:
Synonyms of RyabchikoviteHide
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Relationship of Ryabchikovite to other SpeciesHide
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Other Members of this group:
| Aegirine | NaFe3+Si2O6 | Mon. 2/m : _B_2/b |
|---|---|---|
| Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 | Mon. 2/m : _B_2/b |
| Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : _B_2/b |
| Burnettite | CaVAlSiO6 | Mon. 2/m : _B_2/b |
| Clinoenstatite | MgSiO3 | Mon. 2/m : _P_21/b |
| Clinoferrosilite | Fe2+2Si2O6 | Mon. 2/m : _P_21/b |
| Colomeraite | NaTi3+Si2O6 | Mon. 2/m : _B_2/b |
| Davisite | CaScAlSiO6 | Mon. 2/m : _B_2/b |
| Diopside | CaMgSi2O6 | Mon. 2/m : _B_2/b |
| Esseneite | CaFe3+[AlSiO6] | Mon. 2/m : _B_2/b |
| Grossmanite | CaTi3+ AlSiO6 | Mon. 2/m : _B_2/b |
| Hedenbergite | CaFe2+Si2O6 | Mon. 2/m : _B_2/b |
| Jadeite | Na(Al,Fe3+)Si2O6 | Mon. 2/m : _B_2/b |
| Jervisite | NaSc3+Si2O6 | Mon. 2/m : _B_2/b |
| Johannsenite | CaMn2+Si2O6 | Mon. 2/m : _B_2/b |
| Kanoite | Mn2+(Mg,Mn2+)Si2O6 | Mon. 2/m : _P_21/b |
| Kosmochlor | NaCrSi2O6 | Mon. 2/m : _B_2/b |
| Kushiroite | CaAl[AlSiO6] | Mon. 2/m : _B_2/b |
| Namansilite | NaMn3+Si2O6 | Mon. 2/m : _B_2/b |
| Natalyite | NaV3+Si2O6 | Mon. 2/m : _B_2/b |
| Omphacite | (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6 | Mon. 2/m |
| Petedunnite | Ca(Zn,Mn2+,Mg,Fe2+)Si2O6 | Mon. 2/m : _B_2/b |
| Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : _P_21/b |
| Spodumene | LiAlSi2O6 | Mon. 2/m : _B_2/b |
| Tissintite | (Ca,Na,◻)AlSi2O6 | Mon. 2/m : _B_2/b |
| UM2001-19-SiO:AlCaMgNa | (Na,Mg,Ca)(Mg,Al)Si2O6 | Mon. 2/m : _B_2/b |
| UM2003-36-SiO:CaNa | NaCrSi2O6 - CaMgSi2O6 | Mon. 2/m : _B_2/b |
Related Minerals - Strunz-mindat GroupingHide
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| 9.DA. | Protoenstatite | Mg2Si2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c n |
|---|---|---|---|
| 9.DA. | Colomeraite | NaTi3+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.05 | Donpeacorite | (Mn,Mg)MgSi2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.DA.05 | Enstatite | Mg2Si2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.DA.05 | Ferrosilite | Fe2+2Si2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.DA.10 | Clinoenstatite | MgSiO3 | Mon. 2/m : _P_21/b |
| 9.DA.10 | Clinoferrosilite | Fe2+2Si2O6 | Mon. 2/m : _P_21/b |
| 9.DA.10 | Kanoite | Mn2+(Mg,Mn2+)Si2O6 | Mon. 2/m : _P_21/b |
| 9.DA.10 | Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : _P_21/b |
| 9.DA.15 | Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Diopside | CaMgSi2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Esseneite | CaFe3+[AlSiO6] | Mon. 2/m : _B_2/b |
| 9.DA.15 | Hedenbergite | CaFe2+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 va | Jeffersonite | Ca(Mn,Zn,Fe)Si2O6 | |
| 9.DA.15 | Johannsenite | CaMn2+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Petedunnite | Ca(Zn,Mn2+,Mg,Fe2+)Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Davisite | CaScAlSiO6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Kushiroite | CaAl[AlSiO6] | Mon. 2/m : _B_2/b |
| 9.DA.15 | Grossmanite | CaTi3+ AlSiO6 | Mon. 2/m : _B_2/b |
| 9.DA.20 | Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.20 | Omphacite | (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6 | Mon. 2/m |
| 9.DA.25 | Aegirine | NaFe3+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Jadeite | Na(Al,Fe3+)Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Jervisite | NaSc3+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Kosmochlor | NaCrSi2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Namansilite | NaMn3+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Natalyite | NaV3+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Tissintite | (Ca,Na,◻)AlSi2O6 | Mon. 2/m : _B_2/b |
| 9.DA.30 | Spodumene | LiAlSi2O6 | Mon. 2/m : _B_2/b |
| 9.DA.35 | Hiroseite | FeSiO3 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
Other InformationHide
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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 RyabchikoviteHide
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References for RyabchikoviteHide
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Reference List:
Shchipalkina, Nadezhda V., Vereshchagin, Oleg S., Pekov, Igor V., Belakovskiy, Dmitry I., Koshlyakova, Natalia N., Shilovskikh, Vladimir V., Pankin, Dmitriy V., Britvin, Sergey N., Sandalov, Fedor D., Sidorov, Evgeny G. (2023) Ryabchikovite, CuMg(Si2O6), a new pyroxene group mineral, and some genetic features of natural anhydrous copper silicates. American Mineralogist, 108 (7) 1399-1408 doi:10.2138/am-2022-8620
Localities for RyabchikoviteHide
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This 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.
Locality ListHide
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- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Russia (TL) | |
|---|---|
| Kamchatka Krai Milkovsky District Tolbachik Volcanic field Great Fissure eruption (Main Fracture) Northern Breakthrough (North Breach) Second scoria cone ⓘ Arsenatnaya fumarole (TL) | Miyawaki et al. (2021) +1 other reference |