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Krinovite

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Evgeny L. Krinov
Formula:
Na2Mg4Cr3+2(Si6O18)O2
Colour:
Emerald green
Lustre:
Sub-Adamantine
Hardness:
5½ - 7
Crystal System:
Triclinic
Name:
Named in honor of Evgeny Leonidovich Krinov (Евгений Леонидович Кринов) (3 March 1906, Tambov, Russian Empire - 2 January 1984), Russian expert on meteorites. It is pronounced kreen'-off-ite.
This page provides mineralogical data about Krinovite.


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Classification of KrinoviteHide

Approved
Approval Year:
1967
First Published:
1968
9.DH.40

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
69.2.1a.4

69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
14.15.4

14 : Silicates not Containing Aluminum
15 : Silicates of Cr

Physical Properties of KrinoviteHide

Sub-Adamantine
Transparency:
Translucent
Colour:
Emerald green
Streak:
Greenish white
Hardness:
5½ - 7 on Mohs scale
Cleavage:
None Observed

Optical Data of KrinoviteHide

Type:
Biaxial (+)
RI values:
nα = 1.712 nβ = 1.725 nγ = 1.760
2V:
Measured: 61° , Calculated: 64°
Max Birefringence:
δ = 0.048
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
relatively strong

Chemical Properties of KrinoviteHide

Formula:
Na2Mg4Cr3+2(Si6O18)O2
IMA Formula:
Na4[Mg8Cr3+4]O4[Si12O36]
Common Impurities:
Ti,Al,Fe,Mn,Ca,K

Crystallography of KrinoviteHide

Crystal System:
Triclinic
Cell Parameters:
a = 10.23 Å, b = 10.64 Å, c = 8.78 Å
α = 105.15°, β = 96.5°, γ = 125.15°
Ratio:
a:b:c = 0.961 : 1 : 0.825
Unit Cell V:
710.91 ų (Calculated from Unit Cell)

Type Occurrence of KrinoviteHide

Synonyms of KrinoviteHide

Other Language Names for KrinoviteHide

German:Krinovit
Simplified Chinese:硅铬镁石
铬镁硅石
Spanish:Krinovita

Relationship of Krinovite to other SpeciesHide

Other Members of this group:
AenigmatiteNa2Fe2+5Ti(Si6O18)O2Tric. 1 : P1
KuratiteCa2(Fe2+5Ti)O2[Si4Al2O18]Tric. 1 : P1
UM1991-29-SiO:FeMgNaNa4(Mg5Fe3+7)O4[Si9Fe3+3O36]
WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1

Related Minerals - Nickel-Strunz GroupingHide

9.DH.05LeucophaniteNaCaBeSi2O6FOrth. 2 2 2 : P21 21 21
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2OMon.
9.DH.15HaradaiteSrVSi2O7Orth.
9.DH.15SuzukiiteBaVSi2O7Orth.
9.DH.20BatisiteBaNaNaTi2(Si4O12)O2Orth.
9.DH.20Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2Orth.
9.DH.25TaikaniteSr3BaMn2+2(Si4O12)O2Mon.
9.DH.30KrauskopfiteBaSi2O5 · 3H2OMon.
9.DH.35Balangeroite(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40Mon.
9.DH.35GageiteMn21(Si4O12)2O3(OH)20Mon. 2/m
9.DH.40AenigmatiteNa2Fe2+5Ti(Si6O18)O2Tric. 1 : P1
9.DH.40DorriteCa4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)Tric.
9.DH.40HøgtuvaiteCa4[Fe2+6Fe3+6]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40Makarochkinite(Ca,Na)2Fe2+4Fe3+Ti[O2|BeAlSi4O18]Tric. 1 : P1
9.DH.40RhöniteCa2(Mg,Fe2+,Fe3+,Ti)6[O2|(Si,Al)6O18]Tric. 1 : P1
9.DH.40SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
9.DH.40WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
9.DH.40WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1
9.DH.45SapphirineMg4(Mg3Al9)O4[Si3Al9O36]Mon. 2/m : P21/b
9.DH.50Khmaralite(Mg,Al,Fe)16[(Al,Si,Be)12O36]O4Mon. 2/m : P21/b
9.DH.55Surinamite(Mg,Fe)3Al4BeSi3O16Mon.
9.DH.60Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon.
9.DH.65HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13Tric.
9.DH.65Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
9.DH.70JohninnesiteNa2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2Tric.
9.DH.75AgrelliteNaCa2Si4O10FTric.

Related Minerals - Dana Grouping (8th Ed.)Hide

69.2.1a.1AenigmatiteNa2Fe2+5Ti(Si6O18)O2Tric. 1 : P1
69.2.1a.2DorriteCa4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)Tric.
69.2.1a.3HøgtuvaiteCa4[Fe2+6Fe3+6]O4[Si8Be2Al2O36]Tric. 1 : P1
69.2.1a.5RhöniteCa2(Mg,Fe2+,Fe3+,Ti)6[O2|(Si,Al)6O18]Tric. 1 : P1
69.2.1a.6SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
69.2.1a.7WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
69.2.1a.8WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.15.1KosmochlorNaCrSi2O6Mon.
14.15.2NatalyiteNaV3+Si2O6Mon.
14.15.3KnorringiteMg3Cr2(SiO4)3Iso.
14.15.5UvaroviteCa3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d

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.

References for KrinoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Olsen, E., Fuchs, L. (1968) Krinovite, NaMg2CrSi3O10: a new meteorite mineral. Science: 161: 786-787.
Fleischer, M. (1969) New mineral names. American Mineralogist: 54: 573-580.
Merlino, S. (1972) X-ray crystallography of krinovite. Zeitschrift für Kristallographie: 136: 81-88.
Bonaccorsi, E., Merlino, S., Pasero, M. (1989) The crystal structure of the meteoritic mineral krinovite, NaMg2CrSi3O10. Zeitschrift für Kristallographie: 187: 133-138.
Burt, D.M. (1994) Vector representation of some mineral compositions in the aenigmatite group, with special reference to hogtuvaite. The Canadian Mineralogist: 32: 449-457.
Jensen, B.B. (1996) Solid solution among members of the aenigmatite group. Mineralogical Magazine: 60: 982-986.
Kunzmann, T. (1999) The aenigmatite-rhönite mineral group. European Journal of Mineralogy: 11: 743-756.
Grew, E.S., Hålenius, U., Pasero, M., Barbier, J. (2008) Recommended nomenclature for the sapphirine and surinamite group (sapphirine supergroup). Mineralogical Magazine: 72: 839-876.

Internet Links for KrinoviteHide

Localities for KrinoviteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Arizona
    • Coconino Co.
      • Winslow
        • Meteor Crater area
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 171-172, 269, 356; Olsen, E. & L. Fuchs (1968), Krinovite, NaMg2CrSi3O10 = a new meteorite mineral, Science 161: 786-787; HB2/1 (1995); Eur.Jour.Min.: 11 (1999): 743.
  • Texas
    • Wichita Co.
      • Electra
http://rruff.geo.arizona.edu/doclib/hom/krinovite.pdf.
Mineral and/or Locality  
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