Korobitsynite Mineral Data

Korobitsynite Mineral Data

General Korobitsynite Information

Chemical Formula:

Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O)

Composition:

Molecular Weight = 578.44 gm

Sodium 10.33 % Na 13.93 % Na₂O

Titanium 12.42 % Ti 20.71 % TiO₂

Niobium 8.03 % Nb 11.49 % Nb₂O₅

Silicon 19.42 % Si 41.55 % SiO₂

Hydrogen 1.39 % H 12.46 % H₂O

Oxygen 48.40 % O

______ ______

100.00 % 100.14 % = TOTAL OXIDE

Empirical Formula:

Na_2.6Ti_1.5Nb_0.5Si₄O₁₃(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.

Korobitsynite Image

Images:

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

Korobitsynite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Forms:

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Physical Properties of Korobitsynite

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

Optical Properties of Korobitsynite

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

Calculated Properties of Korobitsynite

Electron Density:

r_electron=2.56 gm/cc
note: r_{Korobitsynite}=2.59 gm/cc.

Fermion Index

Fermion Index = 0.02535
Boson Index = 0.97465

Photoelectric:

PE_{Korobitsynite}= 14.43 barns/electron
U=PE_{Korobitsynite} x r_electron= 36.98 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Korobitsynite is Not Radioactive

Korobitsynite Classification

Dana Class:

60.1.3a.2 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.3a)Labuntsovite Group (Nenadkevichite subgroup Orthorhombic [Pbam])

60.1.3a.1 Nenadkevichite! (Na,Ca,K)(Nb,Ti)Si2O6(O,OH)·2(H2O) Pbam 2/m 2/m 2/m

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

VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8-

VIII/E.07 - Labuntsovite Group

VIII/E.07-10 Korobitsynite Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-20 Nenadkevichite (Na,Ca,K)(Nb,Ti)Si2O6(O,OH)·2(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-30* Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m

VIII/E.07-30 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O) Cm m

VIII/E.07-32 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m

VIII/E.07-33 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

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

VIII/E.07-40 Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O) Cm m

VIII/E.07-50 Clinophosinaite! Na3CaPSiO7 P 2/c 2/m

VIII/E.07-50* Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8(H2O) Cm m

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

VIII/E.07-60 Phosinaite-(Ce)! Na13Ca2Ce[Si4O12](PO4)4 P 22121 2 2 2

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

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

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

VIII/E.07-100 Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O) C 2/m 2/m

VIII/E.07-110 Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O) C 2/m 2/m

VIII/E.07-130 Paralabuntsovite-Mg! Na8K8Mg8Ti16(Si4O12)8(O,OH)16·n(H2O) I2/m 2/m

VIII/E.07-140 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

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

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

VIII/E.07-170 Parakuzmenkoite-Fe! (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

VIII/E.07-180 Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

VIII/E.07-190 Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-200 Gutkovaite-Mn! CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4·5(H2O) Cm m

VIII/E.07-205 Neskevaaraite-Fe! NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-210 Alsakharovite-Zn! NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m

VIII/E.07-220 Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m

Other Korobitsynite Information

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: