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Kudryavtsevaite

A valid IMA mineral species
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04473670017066557616671.jpg
Galina P. Kudryavtseva
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.
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Unique IdentifiersHide

Mindat ID:
43598
Long-form identifier:
mindat:1:1:43598:3
GUID
(UUID V4):
652cef28-e24e-46c1-8b4b-0058e5b3bd12

IMA Classification of KudryavtsevaiteHide

Classification of KudryavtsevaiteHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
KudIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of KudryavtsevaiteHide

Vitreous
Transparency:
Opaque
Colour:
Greyish black
Streak:
Black
Hardness:
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 KudryavtsevaiteHide

Anisotropism:
Greyish-bluish rotation tint
Bireflectance:
moderate
Reflectivity:
WavelengthR1R2
471.1nm21.3% 25.4%
548.3nm20.6% 24.1%
586.6nm20.0% 23.5%
652.3nm19.1% 22.4%

Reflectance graph
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 KudryavtsevaiteHide

Mindat Formula:
Na3(Mg,Fe)(Fe,Ti)2Ti3O12

Crystallography of KudryavtsevaiteHide

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 StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0019835KudryavtsevaiteAnashkin S, Bovkun A, Bindi L, Garanin V, Litvin Y (2013) Kudryavtsevaite, Na3MgFe3+Ti4O12, a new kimberlitic mineral Mineralogical Magazine 77 327-3342013Orapa area, Botswana0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
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 EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
36 : Carbonatites, kimberlites, and related igneous rocks

Type Occurrence of KudryavtsevaiteHide

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 KudryavtsevaiteHide

Related Minerals - Strunz-mindat GroupingHide

4.BC.AddibischoffiteCa2Al6Al6O20Tric. 1 : P1
4.BC.EllinaiteCaCr2O4Orth. mmm (2/m 2/m 2/m) : Pnma
4.BC.IgelströmiteFe3+(SbPb)O4Tet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.BC.05MarokiteCaMn3+2O4Orth.
4.BC.10DmitryivanoviteCaAl2O4Mon. 2/m : P21/b
4.BC.15WarkiteCa2Sc6Al6O20Tric. 1 : P1
4.BC.30TululiteCa14(Fe3+,Al)(Al,Zn,Fe3+,Si,P,Mn,Mg)15O36Iso. 2 3 : F2 3
4.BC.30ValleyiteCa4Fe6O13Iso. 4 3m : I4 3m
4.BC.35KrotiteCaAl2O4Mon. 2/m

Other InformationHide

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 KudryavtsevaiteHide

References for KudryavtsevaiteHide

Localities for KudryavtsevaiteHide

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

- 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.
Botswana (TL)
 
  • Central District
    • Letlhakane
      • Orapa
Anashkin et al. (2013)
 
Mineral and/or Locality  
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