Krinovite
A valid IMA mineral species
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Formula:
Na2Mg4Cr3+2(Si6O18)O2
Colour:
Emerald green
Lustre:
Sub-Adamantine
Hardness:
5½ - 7
Specific Gravity:
3.38
Crystal System:
Triclinic
Member of:
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.
Unique Identifiers
Mindat ID:
2276
Long-form identifier:
mindat:1:1:2276:3
GUID
(UUID V4):
(UUID V4):
16eca110-8e29-4123-bbca-46a3acb6adb8
IMA Classification of Krinovite
Approved
IMA Formula:
Na4[Mg8Cr3+4]O4[Si12O36]
Approval year:
1967
First published:
1968
Type description reference:
Classification of Krinovite
9.DH.40
9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
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
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
14 : Silicates not Containing Aluminum
15 : Silicates of Cr
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 |
---|---|---|
Kvi | 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 Krinovite
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 Krinovite
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.
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 Krinovite
Mindat Formula:
Na2Mg4Cr3+2(Si6O18)O2
Common Impurities:
Ti,Al,Fe,Mn,Ca,K
Crystallography of Krinovite
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°
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 Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
---|---|---|---|---|---|---|---|
0010992 | Krinovite | Bonaccorsi E, Merlino S, Pasero M (1989) The crystal structure of the meteoritic mineral krinovite, NaNaMg2CrSi3O10 Zeitschrift fur Kristallographie 187 133-138 | 1989 | Wichita County, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
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 Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
5 : Primary asteroid phases | 4.566–4.560 |
Type Occurrence of Krinovite
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 Krinovite
Other Language Names for Krinovite
Relationship of Krinovite to other Species
Member of:
Other Members of this group:
Aenigmatite | Na4[Fe2+10Ti2]O4[Si12O36] | Tric. 1 : P1 |
Kuratite | Ca2(Fe2+5Ti)O2[Si4Al2O18] | Tric. 1 : P1 |
UM1991-29-SiO:FeMgNa | Na4(Mg5Fe3+7)O4[Si9Fe3+3O36] | |
Wilkinsonite | Na2Fe2+4Fe3+2(Si6O18)O2 | Tric. 1 : P1 |
Related Minerals - Strunz-mindat Grouping
9.DH. | Gageite-2M | (Mn,Mg,Zn)42Si16O54(OH)40 |
9.DH. | Bavsiite | Ba2V2O2[Si4O12] |
9.DH. | Devilliersite | Ca4Ca2Fe3+10O4[(Fe3+10Si2)O36] |
9.DH. | Yuzuxiangite | Sr3Fe3+(Si2O6)2(OH) · 3H2O |
9.DH. | Louisfuchsite | Ca2(Mg4Ti2)(Al4Si2)O20 |
9.DH.05 | Leucophanite | NaCaBeSi2O6F |
9.DH.10 | Ohmilite | Sr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O |
9.DH.15 | Haradaite | SrVSi2O7 |
9.DH.15 | Suzukiite | BaVSi2O7 |
9.DH.20 | Batisite | BaNaNaTi2(Si4O12)O2 |
9.DH.20 | Shcherbakovite | (K,Ba)KNa(Ti,Nb)2(Si4O12)O2 |
9.DH.20 | Noonkanbahite | BaKNaTi2(Si4O12)O2 |
9.DH.25 | Taikanite | Sr3BaMn2+2(Si4O12)O2 |
9.DH.30 | Krauskopfite | BaSi2O5 · 3H2O |
9.DH.35 | Balangeroite | (Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40 |
9.DH.35 | Gageite | Mn21(Si4O12)2O3(OH)20 |
9.DH.40 | Aenigmatite | Na4[Fe2+10Ti2]O4[Si12O36] |
9.DH.40 | Dorrite | Ca4(Mg3Fe3+9)O4(Si3Al8Fe3+O36) |
9.DH.40 | Høgtuvaite | Ca4[Fe2+6Fe3+6]O4[Si8Be2Al2O36] |
9.DH.40 | Makarochkinite | (Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36] |
9.DH.40 | Rhönite | Ca4[Mg8Fe3+2Ti2]O4[Si6Al6O36] |
9.DH.40 | Serendibite | Ca4[Mg6Al6]O4[Si6B3Al3O36] |
9.DH.40 | Welshite | Ca4Mg9Sb3O4[Si6Be3AlFe2O36] |
9.DH.40 | Wilkinsonite | Na2Fe2+4Fe3+2(Si6O18)O2 |
9.DH.40 | Leucorhönite | Ca2(Mg,Fe3+,Al)6(Si,Al)6O20 |
9.DH.40 | Kuratite | Ca2(Fe2+5Ti)O2[Si4Al2O18] |
9.DH.40 | Khesinite | Ca4(Mg3Fe3+9)O4(Fe3+9Si3)O36 |
9.DH.40 | UM1991-29-SiO:FeMgNa | Na4(Mg5Fe3+7)O4[Si9Fe3+3O36] |
9.DH.45 | Sapphirine | Mg4(Mg3Al9)O4[Si3Al9O36] |
9.DH.50 | Khmaralite | (Mg,Al,Fe)16[(Al,Si,Be)12O36]O4 |
9.DH.55 | Surinamite | (Mg,Fe)3Al4BeSi3O16 |
9.DH.55 | UM1988-26-SiO:AlMg | Mg4Al2O[Si3Al2O15] |
9.DH.60 | Deerite | (Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5 |
9.DH.65 | Howieite | Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13 |
9.DH.65 | Taneyamalite | (Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44 |
9.DH.70 | Johninnesite | Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2 |
9.DH.75 | Agrellite | NaCa2Si4O10F |
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 Krinovite
mindat.org URL:
https://www.mindat.org/min-2276.html
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References for Krinovite
Reference List:
Merlino, S. (1972) X-ray crystallography of krinovite. Zeitschrift für Kristallographie: 136: 81-88.
Jensen, B. B. (1996) Solid solution among members of the aenigmatite group. Mineralogical Magazine, 60 (403) 982-986 doi:10.1180/minmag.1996.060.403.14
Kunzmann, Thomas (1999) The aenigmatite-rhönite mineral group. European Journal of Mineralogy, 11 (4) 743-756 doi:10.1127/ejm/11/4/0743
Localities for Krinovite
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.
Australia | |
| Merlino (1972) |
Mexico | |
| Meteoritical Bulletin: MB 107 (2018) |
USA (TL) | |
| Olsen (1968) +3 other references |
| rruff.geo.arizona.edu (n.d.) |
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