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Krinovite

A valid IMA mineral species
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04224970015063072346334.jpg
Evgeny L. Krinov
Formula:
Na2Mg4Cr3+2(Si6O18)O2
Colour:
Emerald green
Lustre:
Sub-Adamantine
Hardness:
5½ - 7
Specific Gravity:
3.38
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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Unique IdentifiersHide

Mindat ID:
2276
Long-form identifier:
mindat:1:1:2276:3
GUID
(UUID V4):
16eca110-8e29-4123-bbca-46a3acb6adb8

IMA Classification of KrinoviteHide

Approved
IMA Formula:
Na4[Mg8Cr3+4]O4[Si12O36]
Approval year:
1967
First published:
1968

Classification of KrinoviteHide

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

Mineral SymbolsHide

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

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

Physical Properties of KrinoviteHide

Sub-Adamantine
Transparency:
Translucent
Colour:
Emerald green
Streak:
Greenish white
Hardness:
5½ - 7 on Mohs scale
Cleavage:
None Observed
Density:
3.38 g/cm3 (Measured)    3.44 g/cm3 (Calculated)

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
Pleochroism:
Strong
Comments:
X = yellow-green; Y = blue-green; Z = greenish black, may be an anomalous dark reddish brown

Chemistry of KrinoviteHide

Mindat Formula:
Na2Mg4Cr3+2(Si6O18)O2
Common Impurities:
Ti,Al,Fe,Mn,Ca,K

Crystallography of KrinoviteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
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)
Z:
2
Twinning:
Multiple twinning common.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0010992KrinoviteBonaccorsi E, Merlino S, Pasero M (1989) The crystal structure of the meteoritic mineral krinovite, NaNaMg2CrSi3O10 Zeitschrift fur Kristallographie 187 133-1381989Wichita County, USA0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.501 Å(100)
2.655 Å(90)
2.893 Å(80)
2.080 Å(70)
7.92 Å(60)
3.639 Å(60)
3.104 Å(60)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 2: Planetesimal differentiation and alteration4.566-4.550
5 : Primary asteroid phases4.566–4.560

Type Occurrence of KrinoviteHide

Geological Setting of Type Material:
octahedrite iron meteorites
Associated Minerals at Type Locality:
Reference:
Olsen, E., Fuchs, L. (1968) Krinovite, NaMg2CrSi3O10: a new meteorite mineral. Science: 161: 786-787.

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:
AenigmatiteNa4[Fe2+10Ti2]O4[Si12O36]Tric. 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 - Strunz-mindat GroupingHide

9.DH.Gageite-2M(Mn,Mg,Zn)42Si16O54(OH)40Mon. 2/m
9.DH.BavsiiteBa2V2O2[Si4O12]Tet. 4/m : I4/m
9.DH.DevilliersiteCa4Ca2Fe3+10O4[(Fe3+10Si2)O36]Tric. 1 : P1
9.DH.YuzuxiangiteSr3Fe3+(Si2O6)2(OH) · 3H2OMon. 2/m : P21/m
9.DH.LouisfuchsiteCa2(Mg4Ti2)(Al4Si2)O20Tric. 1 : P1
9.DH.05LeucophaniteNaCaBeSi2O6FOrth. 2 2 2 : P21 21 21
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2OMon. 2/m : P21/m
9.DH.15HaradaiteSrVSi2O7Orth. mmm (2/m 2/m 2/m)
9.DH.15SuzukiiteBaVSi2O7Orth.
9.DH.20BatisiteBaNaNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.20Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.20NoonkanbahiteBaKNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.25TaikaniteSr3BaMn2+2(Si4O12)O2Mon. 2 : B2
9.DH.30KrauskopfiteBaSi2O5 · 3H2OMon. 2/m : P21/b
9.DH.35Balangeroite(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40Mon. 2/m
9.DH.35GageiteMn21(Si4O12)2O3(OH)20Mon. 2/m
9.DH.40AenigmatiteNa4[Fe2+10Ti2]O4[Si12O36]Tric. 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)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40RhöniteCa4[Mg8Fe3+2Ti2]O4[Si6Al6O36]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.40LeucorhöniteCa2(Mg,Fe3+,Al)6(Si,Al)6O20Tric.
9.DH.40KuratiteCa2(Fe2+5Ti)O2[Si4Al2O18]Tric. 1 : P1
9.DH.40KhesiniteCa4(Mg3Fe3+9)O4(Fe3+9Si3)O36Tric. 1 : P1
9.DH.40UM1991-29-SiO:FeMgNaNa4(Mg5Fe3+7)O4[Si9Fe3+3O36]
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. 2/m
9.DH.55UM1988-26-SiO:AlMgMg4Al2O[Si3Al2O15]
9.DH.60Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon. 2/m : P21/b
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. 1 : P1

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 KrinoviteHide

References 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 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.
Australia
 
  • Western Australia
    • Quairading Shire
Merlino (1972)
Mexico
 
  • Zacatecas
    • Vetagrande Municipality
Meteoritical Bulletin: MB 107 (2018)
USA (TL)
 
  • Arizona
    • Coconino County
      • Meteor Crater area
Olsen (1968) +3 other references
  • Texas
    • Wichita County
      • Electra
rruff.geo.arizona.edu (n.d.)
 
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