Sharyginite
A valid IMA mineral species
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About Sharyginite
Formula:
Ca3TiFe2O8
Colour:
Dark brown
Lustre:
Sub-Metallic
Hardness:
5½ - 6
Specific Gravity:
3.943 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honour of Victor Victorovich Sharygin (b.1964) from the Sobolev Institute of Geology and Mineralogy, Novosibirsk, Russia. He is a mineralogist, and expert on alkaline and pyrometamorphic rocks. He worked on xenolith specimens with sharyginite from Eifel and published some preliminary data on the mineral.
Unique Identifiers
Mindat ID:
51845
Long-form identifier:
mindat:1:1:51845:3
GUID
(UUID V4):
(UUID V4):
282602bb-7eee-495c-a7a2-41d16ac73005
IMA Classification of Sharyginite
Approved
Approval year:
2017
First published:
2018
Type description reference:
Classification of Sharyginite
4.AC.10
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
A : Metal: Oxygen = 2:1 and 1:1
C : M:O = 1:1 (and up to 1:1.25); with large cations (+- smaller ones)
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
A : Metal: Oxygen = 2:1 and 1:1
C : M:O = 1:1 (and up to 1:1.25); with large cations (+- smaller ones)
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 |
|---|---|---|
| Syg | 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 Sharyginite
Sub-Metallic
Transparency:
Opaque
Colour:
Dark brown
Streak:
Brown
Hardness:
5½ - 6 on Mohs scale
Hardness:
VHN25=621 - 649 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on (010) and imperfect along (001) and (100).
Good on (010) and imperfect along (001) and (100).
Fracture:
Irregular/Uneven
Density:
3.943 g/cm3 (Calculated)
Optical Data of Sharyginite
Anisotropism:
Weak
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 470nm | 16.1% | 15.5% |
| 546nm | 14.9% | 14.2% |
| 589nm | 14.6% | 14.1% |
| 650nm | 14.5% | 13.9% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 16.1%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Light grey
Internal Reflections:
Yellowish-brown (rare)
Pleochroism:
Weak
Comments:
Grey to very light grey
Chemistry of Sharyginite
Mindat Formula:
Ca3TiFe2O8
Elements listed:
Crystallography of Sharyginite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pmc21
Cell Parameters:
a = 5.423(2) Å, b = 11.150(8) Å, c = 5.528(2) Å
Ratio:
a:b:c = 0.486 : 1 : 0.496
Unit Cell V:
334.3 ų
Z:
2
Morphology:
Pinacoids {100}, {010} and {001}. Crystals are flattened on (010).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.763 Å | (32) |
| 2.712 Å | (27) |
| 2.679 Å | (100) |
| 1.936 Å | (36) |
| 1.857 Å | (19) |
| 1.580 Å | (18) |
| 1.559 Å | (12) |
| 1.341 Å | (11) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-𝑇 alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 51 : Pyrometamorphic minerals (see also #54 and #56) | <0.36 |
Type Occurrence of Sharyginite
General Appearance of Type Material:
Flat crystals up to 100 µm in length.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum, Leninskiy pr., 18/k2, 115162 Moscow, Russia, catalogue number 4958/1.
Empirical Formula of Type Material:
Ca3.00(Fe3+1.00Ti3 4+0.86Mn4+0.11Zr0.01Cr3+0.01Mg0.01)Σ2(Fe3+0.76Al0.20Si0.04) Σ1.00O8
Geological Setting of Type Material:
Metacarbonate xenoliths in alkali basalt
Associated Minerals at Type Locality:
Reference:
Juroszek, R., Krüger, H., Galuskina, I., Krüger, B., Jeżak, L., Ternes, B., Wojdyla, J., Krzykawski, T., Pautov, L., Galuskin, E. (2018) Sharyginite, Ca3TiFe2O8, A New Mineral from the Bellerberg Volcano, Germany. Minerals: 8: 308.
Synonyms of Sharyginite
Relationship of Sharyginite to other Species
Other Members of this group:
| Brownmillerite | Ca2(Al,Fe3+)2O5 | Orth. mm2 |
| Nataliakulikite | Ca4Ti2(Fe3+,Fe2+)(Si,Fe3+,Al)O11 | Orth. mmm (2/m 2/m 2/m) : Pnma |
| Shulamitite | Ca3TiFe3+AlO8 | Orth. mmm (2/m 2/m 2/m) : Pmma |
| Srebrodolskite | Ca2Fe3+2O5 | Orth. mmm (2/m 2/m 2/m) : Pnma |
Related Minerals - Strunz-mindat Grouping
| 4.AC.05 | Swedenborgite | NaBe4Sb5+O7 |
| 4.AC.10 | Brownmillerite | Ca2(Al,Fe3+)2O5 |
| 4.AC.10 | Srebrodolskite | Ca2Fe3+2O5 |
| 4.AC.10 | Shulamitite | Ca3TiFe3+AlO8 |
| 4.AC.15 | Montroydite | HgO |
| 4.AC.20 | Litharge | PbO |
| 4.AC.20 | Romarchite | SnO |
| 4.AC.25 | Massicot | PbO |
| 4.AC.30 | Nataliakulikite | Ca4Ti2(Fe3+,Fe2+)(Si,Fe3+,Al)O11 |
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.
Internet Links for Sharyginite
mindat.org URL:
https://www.mindat.org/min-51845.html
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External Links:
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References for Sharyginite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2017) New minerals and nomenclature modifications approved in 2017, CNMNC Newsletter No 37. Mineralogical Magazine, 81 (3) 737-742 doi:10.1180/minmag.2017.081.039
Localities for Sharyginite
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.
Austria | |
| Juroszek et al. (2018) |
Germany (TL) | |
| Mineralogical Magazine: 81: 737–742 +2 other references |
| Sharygin (2012) | |
| in the collection of Christof Schäfer | |
| Ko Jansen |
Hungary | |
| Szakáll et al. (2018) |
Israel | |
| Krüger +2 other references |
Palestine | |
| Juroszek et al. (2018) |
Russia | |
| Juroszek et al. (2018) | |
| Juroszek et al. (2018) |
Ukraine | |
| Juroszek et al. (2018) |
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Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany