Korobitsynite
A valid IMA mineral species
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About Korobitsynite
Mikhail F. Korobitsyn
Formula:
(Na,◻)4Ti2(Si4O12)(O,OH)2 · 4H2O
Colour:
Colorless
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.72
Crystal System:
Orthorhombic
Member of:
Name:
Named after Mikhail Fedorovich Korobitsyn (Михаил Федорович Коробицин) (1928-1996), amateur mineralogist and collector who made significant contributions to mineralogical investigations of the Lovozero alkaline complex.
Unique Identifiers
Mindat ID:
7141
Long-form identifier:
mindat:1:1:7141:9
IMA Classification of Korobitsynite
Approved
IMA Formula:
(Na,◻)4Ti4+2(Si4O12)(O,OH)2·4H2O
Approval year:
1998
First published:
1999
Type description reference:
Classification of Korobitsynite
9.CE.30a
9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
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 for Standard |
|---|---|---|
| Kbi | 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 Korobitsynite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
(001)
(001)
Density:
2.72 g/cm3 (Measured) 2.69 g/cm3 (Calculated)
Optical Data of Korobitsynite
Type:
Biaxial (+)
RI values:
nα = 1.646 nβ = 1.654 nγ = 1.763
Max. Birefringence:
δ = 0.117
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
No measured or calculated 2V is on file for this mineral, so the value used here (32°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
No measured or calculated 2V is on file for this mineral, so the value used here (32°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Dispersion:
weak
Chemistry of Korobitsynite
Mindat Formula:
(Na,◻)4Ti2(Si4O12)(O,OH)2 · 4H2O
Element Weights:
Crystallography of Korobitsynite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pbam
Setting:
Pbam
Cell Parameters:
a = 7.349(2) Å, b = 14.164(2) Å, c = 7.130(1) Å
Ratio:
a:b:c = 0.519 : 1 : 0.503
Unit Cell V:
742.2 ų
Morphology:
Needle-like crystals. Forms include {110}, {001}, {010}, {100}, and {021}.
Crystal Structure
Load
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) |
|---|---|---|---|---|---|---|---|
| 0012492 | Korobitsynite | Rastsvetaeva R K, Chukanov N V, Pekov I V (1997) Crystal structure of a new mineral - titanium analog of orthorhombic nenadkevichite Doklady Akademii Nauk SSSR 357 364-367 | 1997 | 0 | 293 |
CIF Raw Data - click here to close
Epitaxial Relationships of Korobitsynite
Epitaxial Minerals:
| 'Elpidite' | Na2ZrSi6O15 · 3H2O |
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.262 Å | (100) |
| 6.53 Å | (85) |
| 7.09 Å | (79) |
| 2.075 Å | (57) |
| 2.553 Å | (56) |
| 3.180 Å | (52) |
| 2.649 Å | (45) |
| 1.457 Å | (45) |
| 2.512 Å | (42) |
| 1.307 Å | (40) |
| 1.060 Å | (40) |
| 1.271 Å | (35) |
| 5.02 Å | (34) |
| 1.591 Å | (32) |
| 1.122 Å | (30) |
Comments:
Lovozero massif, Kola Peninsula, Russia. The data are from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Korobitsynite
Co-Type Localities:
General Appearance of Type Material:
Prismatic crystals uр to 2 сm.
Place of Conservation of Type Material:
A. E. Fersman Mineralogical Museum, Moscow, Russia, number 89457 (type).
Geological Setting of Type Material:
In miarolitic cavities in pegmatite.
Associated Minerals at Type Locality:
Synonyms of Korobitsynite
Other Language Names for Korobitsynite
Relationship of Korobitsynite to other Species
Member of:
Other Members of Nenadkevichite Group:
| Nenadkevichite | (Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O | Orth. mmm(2/m2/m2/m) : Pbam |
| 'UM2000-63-SiO:BaHKNaNbSrTi' | (H3O)4Na2K[Sr0.4Ba0.3(H2O)0.8]{[Ti4.5Nb3.5](OH)4.5O3.5)[Si4O12]4} · 4.2H2O | Mon. m : Bm |
| 'Unnamed (Ca-Na-ordered analogue of Korobitsynite)' | (Ca,Na)2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2O | Orth. 222 : P21212 |
Common Associates
Associations Based on Photo Data:
| 8 photos of Korobitsynite associated with Aegirine | NaFe3+Si2O6 |
| 4 photos of Korobitsynite associated with Albite | Na(AlSi3O8) |
| 2 photos of Korobitsynite associated with 'Calcioancylite' | |
| 2 photos of Korobitsynite associated with Pyrrhotite | Fe1-xS |
| 2 photos of Korobitsynite associated with Smectite Group | A0.3D2-3[T4O10]Z2 · nH2O |
| 2 photos of Korobitsynite associated with Natrolite | Na2Al2Si3O10 · 2H2O |
| 2 photos of Korobitsynite associated with 'Unnamed (Fe-analogue of Zakharovite)' | Na4Fe5Si10O24(OH)6 · 6H2O |
| 1 photo of Korobitsynite associated with Elpidite | Na2ZrSi6O15 · 3H2O |
| 1 photo of Korobitsynite associated with 'Unnamed (Sazhinite-related mineral I)' | Na, La, Si, O, H |
| 1 photo of Korobitsynite associated with 'Sazhinite' |
Related Minerals - Strunz-mindat Grouping
| 9.CE. | Dutkevichite-(Ce) | NaZnBa2Ce2Ti2Si8O26F · H2O |
| 9.CE. | Katanite | Ba3NbFe3Si2O14 |
| 9.CE. | Niobobaotite | Ba4(Ti2.5Fe2+1.5)Nb4Si4O28Cl |
| 9.CE. | Amaterasuite | Sr4Ti6Si4O23(OH)Cl |
| 9.CE. | Steiningerite | Ba2Zr2(Si4O12)O2 |
| 9.CE.05 | Papagoite | CaCu[H3AlSi2O9] |
| 9.CE.10 | Verplanckite | Ba4Mn2+2Si4O12(OH,H2O)3Cl3 |
| 9.CE.15 | Baotite | Ba4(Ti,Nb,W)8O16(SiO3)4Cl |
| 9.CE.20 | Nagashimalite | Ba4(V,Ti)4B2Si8O27(O,OH)2Cl |
| 9.CE.20 | Taramellite | Ba4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2Clx |
| 9.CE.20 | Titantaramellite | Ba4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2Clx |
| 9.CE.25 | Bario-orthojoaquinite | (Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O |
| 9.CE.25 | Byelorussite-(Ce) | NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2O |
| 9.CE.25 | Joaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O |
| 9.CE.25 | Orthojoaquinite-(La) | NaBa2La2Fe2+Ti2[Si4O12]2O2(O,OH) · H2O |
| 9.CE.25 | Strontiojoaquinite | Sr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2O |
| 9.CE.25 | Orthojoaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O |
| 9.CE.25 | Strontio-orthojoaquinite | (Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2O |
| 9.CE.30e | Labuntsovite-Mn | Na4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10-12H2O |
| 9.CE.30b | Tsepinite-Na | Na2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
| 9.CE.30c | Gjerdingenite-Na | K2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2O |
| 9.CE.30h | Alsakharovite-Zn | NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O |
| 9.CE.30c | Burovaite-Ca | (Na,K)4Ca2(Ti,Nb)8(Si4O12)4(OH,O)8 · 12H2O |
| 9.CE.30a | Nenadkevichite | (Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O |
| 9.CE.30b | Tsepinite-Sr | Sr(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
| 9.CE.30c | Gjerdingenite-Mn | K2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
| 9.CE.30b | Paratsepinite-Na | (Na,Sr,K,Ca)7(Ti,Nb)8(Si4O12)4(O,OH)8 · nH2O n ~ 8 |
| 9.CE.30d | Lemmleinite-K | K2(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2O |
| 9.CE.30c | Karupmøllerite-Ca | (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2O |
| 9.CE.30c | Lepkhenelmite-Zn | (Ba,K)2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O |
| 9.CE.30h | Gutkovaite-Mn | K2CaMn(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2O |
| 9.CE.30e | Labuntsovite-Mg | Na4K4(Ba,K)2Mg(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2O |
| 9.CE.30e | Labuntsovite-Fe | Na4K4(Ba,K)2Fe2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2O |
| 9.CE.30c | Kuzmenkoite-Zn | K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4 · 6-8H2O |
| 9.CE.30f | Paralabuntsovite-Mg | Na8K8Mg4Ti16(Si4O12)8(OH,O)16 · 20-24H2O |
| 9.CE.30d | Lemmleinite-Ba | Na2K2Ba(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2O |
| 9.CE.30g | Organovaite-Mn | K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4 · 5-7H2O |
| 9.CE.30g | Organovaite-Zn | K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
| 9.CE.30b | Vuoriyarvite-K | K2(Nb,Ti)2(Si4O12)(O,OH)2 · 4H2O |
| 9.CE.30c | Gjerdingenite-Fe | K2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
| 9.CE.30a | 'Unnamed (Ca-Na-ordered analogue of Korobitsynite)' | (Ca,Na)2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2O |
| 9.CE.30g | Parakuzmenkoite-Fe | (K,Ba)4Fe(Ti,Nb)8(Si4O12)4(O,OH)8 · 14H2O |
| 9.CE.30c | Kuzmenkoite-Mn | K2Mn2+(Ti,Nb)4(Si4O12)2(OH,O)4 · 5-6H2O |
| 9.CE.30b | Tsepinite-K | K2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
| 9.CE.30b | Paratsepinite-Ba | Ba4(Ti,Nb)8(Si4O12)4(OH,O)8 · 8H2O |
| 9.CE.30h | Neskevaaraite-Fe | K3Na2Fe2+(Ti,Nb)4(Si4O12)2(O,OH)4 · 5-6 H2O |
| 9.CE.30c | Gjerdingenite-Ca | K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
| 9.CE.30b | Tsepinite-Ca | (Ca,K,Na)2-x(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2O |
| 9.CE.45 | 'Natrokomarovite' | (Na,Ca,H)2Nb2Si2O10(OH,F)2 · H2O |
| 9.CE.45 | Komarovite | (Ca,Mn)(Nb,Ti)2[Si2O7](O,F)3 · 3.5H2O |
Other Information
IR Spectrum:
The infrared spectrum has absorption bands at 3500, 3390, 3250, 1633, 1118, 959, 919, 750, 667, and 454 cm–1 .
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 Korobitsynite
mindat.org URL:
https://www.mindat.org/min-7141.html
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References for Korobitsynite
Reference List:
Pekov, I. V., Chukanov, N. V., Khomyakov, A. P., Rastsvetaeva, R. K., Kucherinenko, Y. V., Nedel'ko, V. V. (1999) Korobitsynite, Na3-x(Ti,Nb)2[Si4O12](OH,O)2·3-4H2O, a new mineral from Lovozero massif, Kola Peninsula. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 128 (3) 72-79
Jambor, John L., Pertsev, Nikolai N., Roberts, Andrew C. (2000) New Mineral Names. American Mineralogist, 85. 1321-1325
Localities for Korobitsynite
Showing 9 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Horváth (2001) |
Namibia | |
| Niedermayr et al. (2002) +2 other references |
Russia | |
| Belovitskaya et al. (2004) |
| [AmMin 84:195] |
| Pekov et al. (1999) +3 other references |
| Sorokhtina N.V. et al. (2004) | |
| Pekov et al. (1999) +2 other references |
| Pekov (2000) | |
USA | |
| Robin D. Tibbit (deceased) |
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Shomiokitovoe pegmatite, Umbozero mine, Alluaiv Mountain, Lovozersky District, Murmansk Oblast, Russia