Kudryavtsevaite
A valid IMA mineral species
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Formula:
Na3(Mg,Fe)(Fe,Ti)2Ti3O12
Colour:
Greyish black
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
3.845 (Calculated)
Crystal System:
Orthorhombic
Name:
Named for Galina Petrovna Kudryavtseva (Галина Петровна Кудрявцева) (8 March 1947, Moscow, USSR - 26 February 2006, Moscow, Russia), a well known mineralogist and founder of the Diamond Mineralogy Laboratory and scientific school for investigation of diamond mineralogy and geochemistry at the Lomonosov State University in Moscow, Russia.
New structure type
Unique Identifiers
Mindat ID:
43598
Long-form identifier:
mindat:1:1:43598:3
GUID
(UUID V4):
(UUID V4):
652cef28-e24e-46c1-8b4b-0058e5b3bd12
IMA Classification of Kudryavtsevaite
Approved
IMA Formula:
Na3MgFe3+Ti4O12
Approval year:
2012
First published:
2013
Classification of Kudryavtsevaite
4.BC.25
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
C : With medium-sized and large cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
C : With medium-sized and large 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 |
---|---|---|
Kud | 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 Kudryavtsevaite
Vitreous
Transparency:
Opaque
Colour:
Greyish black
Streak:
Black
Hardness:
6 on Mohs scale
Hardness:
VHN100=876 - 975 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.845 g/cm3 (Calculated)
Comment:
Calculated using empirical formula.
Optical Data of Kudryavtsevaite
Anisotropism:
Greyish-bluish rotation tint
Bireflectance:
moderate
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
471.1nm | 21.3% | 25.4% |
548.3nm | 20.6% | 24.1% |
586.6nm | 20.0% | 23.5% |
652.3nm | 19.1% | 22.4% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 25.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Dark grey
Internal Reflections:
none
Pleochroism:
Weak
Comments:
Dark grey to slightly bluish grey.
Chemistry of Kudryavtsevaite
Mindat Formula:
Na3(Mg,Fe)(Fe,Ti)2Ti3O12
Crystallography of Kudryavtsevaite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbcm
Cell Parameters:
a = 27.714(1) Å, b = 2.9881(3) Å, c = 11.3564(6) Å
Ratio:
a:b:c = 9.275 : 1 : 3.801
Unit Cell V:
940.5 ų
Z:
4
Morphology:
Prismatic, elongated along [010].
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Big Balls | Small Balls | Just Balls | Spacefill
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CIF File Best | x | y | z | a | b | c
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Rotation
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Labels
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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) |
---|---|---|---|---|---|---|---|
0019835 | Kudryavtsevaite | Anashkin S, Bovkun A, Bindi L, Garanin V, Litvin Y (2013) Kudryavtsevaite, Na3MgFe3+Ti4O12, a new kimberlitic mineral Mineralogical Magazine 77 327-334 | 2013 | Orapa area, Botswana | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
7.17 Å | (100) |
4.84 Å | (70) |
2.973 Å | (35) |
2.841 Å | (50) |
2.706 Å | (50) |
2.541 Å | (50) |
2.450 Å | (70) |
2.296 Å | (45) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
36 : Carbonatites, kimberlites, and related igneous rocks |
Type Occurrence of Kudryavtsevaite
General Appearance of Type Material:
Prismatic habit elongated along [010], up to 100 µm.
Place of Conservation of Type Material:
Museo di Storia Naturale, Università degli Studi di Firenze, Firenze, Italy, catalogue number 3115/I.
Geological Setting of Type Material:
Host kimberlite consists of serpentinized forsterite and less common phlogopite and Mg-rich ilmenite, as well as Cr-rich diopside and pyrope, cemented by fine-grained carbonate-serpentine aggregates containing minute grains of unidentified opaque minerals. In fractures within the Mg-rich ilmenite, a secondary mineralization is found.
Associated Minerals at Type Locality:
Reference:
Anashkin, S., Bovkun, A., Bindi, L., Garanin, V., Litvin, Y. (2013) Kudryavtsevaite, Na^3MgFe#3+#Ti^4^O12, a new kimberlitic mineral. Mineralogical Magazine: 77(3): 327-334.
Synonyms of Kudryavtsevaite
Related Minerals - Strunz-mindat Grouping
4.BC. | Addibischoffite | Ca2Al6Al6O20 |
4.BC. | Ellinaite | CaCr2O4 |
4.BC. | Igelströmite | Fe3+(SbPb)O4 |
4.BC.05 | Marokite | CaMn3+2O4 |
4.BC.10 | Dmitryivanovite | CaAl2O4 |
4.BC.15 | Warkite | Ca2Sc6Al6O20 |
4.BC.30 | Tululite | Ca14(Fe3+,Al)(Al,Zn,Fe3+,Si,P,Mn,Mg)15O36 |
4.BC.30 | Valleyite | Ca4Fe6O13 |
4.BC.35 | Krotite | CaAl2O4 |
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 Kudryavtsevaite
mindat.org URL:
https://www.mindat.org/min-43598.html
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References for Kudryavtsevaite
Localities for Kudryavtsevaite
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).
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.
All localities listed without proper references should be considered as questionable.
Botswana (TL) | |
| Anashkin et al. (2013) |
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