Vinogradovite Mineral Data
General Vinogradovite Information
Chemical Formula:
(Na,K)4Ti4(Si,Al)8O26•3(H2O,Na)
Composition:
Molecular Weight = 976.77 gm
Potassium 1.20 % K 1.45 % K2 O
Barium 1.41 % Ba 1.57 % BaO
Sodium 9.89 % Na 13.33 % Na2 O
Titanium 18.14 % Ti 30.26 % TiO2
Niobium 0.95 % Nb 1.36 % Nb2 O5
Aluminum 3.87 % Al 7.31 % Al2 O3
Iron 1.14 % Fe 1.63 % Fe2 O3
Silicon 18.98 % Si 40.60 % SiO2
Hydrogen 0.21 % H 1.84 % H2 O
Oxygen 44.23 % O
______ ______
100.00 % 99.34 % = TOTAL OXIDE
Empirical Formula:
Na4.2 K0.3 Ba0.1 Ti3.7 Fe3+ 0.2 Nb0.1 Si6.6 Al1.4 O26 �(H2 O)
Environment:
Late-stage hydrothermal mineral in cavities and veins, and replacing Ti-bearing minerals, in alkalic pegmatites in differentiated alkalic massifs.
IMA Status:
Valid Species (Pre-IMA) 1956
Locality:
In the Khibiny and Lovozero massifs, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Name Origin:
Named for Alexander Pavlovich Vinogradov, Russian geochemist.
Name Pronunciation:
Vinogradovite + Pronunciation
Vinogradovite Image
Images:
Vinogradovite Crystallography
Axial Ratios:
a:b:c =0.6249:1:2.8294
Cell Dimensions:
a = 5.35, b = 8.56, c = 24.22, Z = 2; beta = 101° V = 1,088.80 Den(Calc)= 2.98
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/a
X Ray Diffraction:
By Intensity(I/Io ): 3.28(1), 3.11(0.9), 6.2(0.8),
Physical Properties of Vinogradovite
Cleavage:
{010} Perfect
Color:
Colorless, White.
Density:
2.878
Diaphaneity:
Transparent
Fracture:
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:
Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Pseudo Orthorhombic - Crystals show an orthorhombic shape.
Hardness:
4 - Fluorite
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Vinogradovite
Gladstone-Dale:
CI meas = -0.003 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = 0.031 (Excellent) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2555,KPDmeas = 0.2646,KC = 0.2637 Ncalc = 1.76 - 1.79
Optical Data:
Biaxial (-), a=1.691-1.745, b=1.769-1.773, g=1.773-1.818, bire=0.0730-0.0820, 2V(Calc)=24-80, 2V(Meas)=41-82.
Pleochroism (x):
colorless.
Pleochroism (y):
brownish.
Pleochroism (z):
brownish.
Calculated Properties of Vinogradovite
Electron Density:
Bulk Density (Electron Density)=2.81 gm/cc note: Specific Gravity of Vinogradovite =2.88 gm/cc.
Fermion Index:
Fermion Index = 0.03 Boson Index = 0.97
Photoelectric:
PEVinogradovite = 11.59 barns/electronU=PEVinogradovite x r electron = 32.57 barns/cc.
Radioactivity:
GRapi = 16.92 (Gamma Ray American Petroleum Institute Units)
Concentration of Vinogradovite per GRapi unit = 5.91 (%)
Estimated Radioactivity from Vinogradovite - barely detectable
Vinogradovite Classification
Dana Class:
68.01.02.01 (68) Inosilicate Structures with Chains of More Than One Width
(68.01) Dana Type
(68.01.02) Dana Group
68.01.02.01 Vinogradovite (Na,K)4Ti4(Si,Al)8O26•3(H2O,Na) A2/a 2/m
68.01.02.02 Paravinogradovite ! (Na,[])2(Ti,Fe)4(Si2O6)2(Si3AlO10)(OH)4•H2O P1 1
Strunz Class:
09.DB.25 09 - SILICATES (Germanates)
09.D - Inosilicates* Structural terminology according to Liebau (1985)
09.DB -Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
09.DB.25 Vinogradovite (Na,K)4Ti4(Si,Al)8O26•3(H2O,Na) A2/a 2/m
09.DB.25 Paravinogradovite ! (Na,[])2(Ti,Fe)4(Si2O6)2(Si3AlO10)(OH)4•H2O P1 1
Other Vinogradovite Information
References:
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
See Also:
Links to other databases for Vinogradovite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
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Vinogradovite
(Na,K)4Ti4(Si,Al)8O26•3(H2O,Na)
Dana No: 68.01.02.01 Strunz No: 09.DB.25
Locality:
Notes:
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