General Korobitsynite Information
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Chemical Formula: |
Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O) |
Composition: |
Molecular Weight = 578.44 gm |
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Sodium 10.33 % Na 13.93 % Na2O |
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Titanium 12.42 % Ti 20.71 % TiO2 |
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Niobium 8.03 % Nb 11.49 % Nb2O5 |
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Silicon 19.42 % Si 41.55 % SiO2 |
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Hydrogen 1.39 % H 12.46 % H2O |
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Oxygen 48.40 % O |
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______ ______ |
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100.00 % 100.14 % = TOTAL OXIDE |
Empirical Formula: |
Na2.6Ti1.5Nb0.5Si4O13(OH)·3.5(H2O) |
Environment: |
Found in hydrothermally affected agpaitic rocks. The Ti-dominant analog of nenadkevichite. It forms epitaxial overgrowths on elpidite crystals. |
IMA Status: |
Approved IMA 1999 (Dana # Added) |
Locality: |
Alluaiv and Karnasurt Mountains, Lovozero alkaline complex, Kola Peninsula, Russia. Link to MinDat.org Location Data. |
Name Origin: |
Named after Mikhail Fedorovich Korobitsyn (1928-1996), amateur mineralogist and collector who made significant contributions to mineralogical investigations of the Lovozero alkaline complex. |
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Korobitsynite Image |
Images:
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Korobitsynite
Comments: Colorless prismatic crystals of korobitsynite.
Location: Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.
Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag |
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Korobitsynite Crystallography
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Axial Ratios: |
a:b:c =0.5188:1:0.5033 |
Cell Dimensions: |
a = 7.349, b = 14.164, c = 7.13, Z = 2; V = 742.17 Den(Calc)= 2.59 |
Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbam |
X Ray Diffraction: |
By Intensity(I/Io): 3.262(1), 6.53(0.85), 7.09(0.72),2.075(0.57), 2.553(0.56), 3.18(0.52), 1.735(0.5), |
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Physical Properties of Korobitsynite
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Cleavage: |
[100] Imperfect |
Color: |
Colorless. |
Diaphaniety: |
Transparent |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Habit: |
Crystalline - Coarse - Occurs as well-formed coarse sized crystals. |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Hardness: |
5 - Apatite |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
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Optical Properties of Korobitsynite
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Gladstone-Dale: |
CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2655,KC= 0.2674 |
Optical Data: |
Biaxial (+), a=1.646, b=1.654, g=1.763, bire=0.1170 |
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Calculated Properties of Korobitsynite
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Electron Density: |
relectron=2.56 gm/cc note: rKorobitsynite =2.59 gm/cc. |
Fermion Index |
Fermion Index = 0.02535 Boson Index = 0.97465 |
Photoelectric: |
PEKorobitsynite = 14.43 barns/electron U=PEKorobitsynite x relectron= 36.98 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Korobitsynite is Not Radioactive |
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Korobitsynite Classification
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Dana Class: |
60.1.3a.2 (60)Cyclosilicate Four-Membered Rings |
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(60.1)as Titanosilicates |
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(60.1.3a)Labuntsovite Group (Nenadkevichite subgroup Orthorhombic [Pbam]) |
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60.1.3a.1 Nenadkevichite! (Na,Ca,K)(Nb,Ti)Si2O6(O,OH)·2(H2O) Pbam 2/m 2/m 2/m |
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60.1.3a.2 Korobitsynite ! Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O) Pbam 2/m 2/m 2/m |
Strunz Class: |
VIII/E.07-10 VIII - Silicates |
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VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8- |
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VIII/E.07 - Labuntsovite Group |
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VIII/E.07-10 Korobitsynite Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O) Pbam 2/m 2/m 2/m |
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VIII/E.07-20 Nenadkevichite (Na,Ca,K)(Nb,Ti)Si2O6(O,OH)·2(H2O) Pbam 2/m 2/m 2/m |
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VIII/E.07-30* Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m |
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VIII/E.07-30 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O) Cm m |
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VIII/E.07-32 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m |
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VIII/E.07-33 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m |
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VIII/E.07-34 Paratsepinite-Ba! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m |
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VIII/E.07-40 Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O) Cm m |
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VIII/E.07-50 Clinophosinaite! Na3CaPSiO7 P 2/c 2/m |
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VIII/E.07-50* Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8(H2O) Cm m |
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VIII/E.07-60* Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4·5(H2O) C 2/m 2/m |
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VIII/E.07-60 Phosinaite-(Ce)! Na13Ca2Ce[Si4O12](PO4)4 P 22121 2 2 2 |
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VIII/E.07-70 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O) C 2/m 2/m |
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VIII/E.07-80 Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m |
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VIII/E.07-90 Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m |
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VIII/E.07-100 Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O) C 2/m 2/m |
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VIII/E.07-110 Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O) C 2/m 2/m |
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VIII/E.07-130 Paralabuntsovite-Mg! Na8K8Mg8Ti16(Si4O12)8(O,OH)16·n(H2O) I2/m 2/m |
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VIII/E.07-140 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m |
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VIII/E.07-150 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m |
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VIII/E.07-155 Labuntsovite-Mn Na4K4(Ba,K)(Mn,Fe)1x(Ti,Nb)8[Si4O12]4(O,OH)8·n(H2O),n=10-12 I2/m 2/m |
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VIII/E.07-170 Parakuzmenkoite-Fe! (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m |
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VIII/E.07-180 Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m |
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VIII/E.07-190 Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Cm m |
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VIII/E.07-200 Gutkovaite-Mn! CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4·5(H2O) Cm m |
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VIII/E.07-205 Neskevaaraite-Fe! NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4·6(H2O) Cm m |
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VIII/E.07-210 Alsakharovite-Zn! NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m |
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VIII/E.07-220 Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m |
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Other Korobitsynite Information
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References: |
NAME( CanMin, 8/99) PHYS. PROP.(MinRec, Vol 31, No4) OPTIC PROP.(MinRec, Vol 31, No4) |
See Also: |
Links to other databases for Korobitsynite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 -Am. Min. Crystal Structure Database
4 -Athena
5 -Google Images
6 -Google Scholar
7 -MinDAT
8 -MinMax(Deutsch)
9 -MinMax(English)
10 -Mineralienatlas (Deutsch)
11 -QUT Mineral Atlas
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Korobitsynite
Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O)
Dana No: 60.1.3a.2 Strunz No: VIII/E.07-10
Locality:
Notes:
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