Vlasovite Mineral Data

Vlasovite Mineral Data +

[Express Minerals] [Minerals for Sale] [About Us] [En EspaÃƒï¿½Ã‚Â±ol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

General Vlasovite Information

Chemical Formula:

Na2ZrSi4O11

Composition:

Molecular Weight = 425.54 gm

Sodium 10.81 % Na 14.56 % Na₂O

Zirconium 21.44 % Zr 28.96 % ZrO₂

Silicon 26.40 % Si 56.48 % SiO₂

Oxygen 41.36 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂ZrSi₄O₁₁

IMA Status:

Approved IMA 1961

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 6267

PDF 39-208

Vlasovite Image

Images:

Vlasovite Eudialyte

Comments: Transparent yellow-gray vlasovite crystal frozen in pink eudialyte matrix.
Location: Kipawa alkaline complex, near Sheffield Lake, Villedieu Township, T?miscamingue Co., Qu?bec, Canada. Scale: 2x2x1 cm.
© John Betts - Fine Minerals

Vlasovite Crystallography

Axial Ratios:

a:b:c =1.0979:1:0.852

Cell Dimensions:

a = 10.98, b = 10, c = 8.52, Z = 4; beta = 100.4° V = 920.13 Den(Calc)= 3.07

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 3.26(1), 2.966(0.94), 5.02(0.72),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Voronkov A A , Zhdanova T A , Pyatenko Y A , Kristallografiya , 19 (1974) p.252-259, Refinement of the structure of vlasovite Na2ZrSi4O11 and some characteristics of, the composition and structure of the zirconosilicates

View Additional jPOWD Structure files for Vlasovite
[1]

Physical Properties of Vlasovite

Cleavage:

[010] Distinct

Color:

Colorless.

Density:

2.97

Diaphaniety:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

6 - Orthoclase

Luminescence:

Fluorescent.

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Vlasovite

Gladstone-Dale:

CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2017,KPDmeas= 0.2085,KC= 0.2062

Optical Data:

Biaxial (-), a=1.607, b=1.623, g=1.628, bire=0.0210

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Vlasovite

Electron Density:

r_electron=2.88 gm/cc
note: r_Vlasovite=2.97 gm/cc.

Fermion Index

Fermion Index = 0.03657
Boson Index = 0.96343

Photoelectric:

PE_Vlasovite= 29.66 barns/electron
U=PE_Vlasovite x r_electron= 85.30 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Vlasovite is Not Radioactive

Vlasovite Classification

Dana Class:

66.2.2.1 (66)Inosilicate Double-Width Unbranched Chains, W=2

(66.2)with P=2 non-amphibole configuration

(66.2.2)Dana Group

66.2.2.1 Vlasovite Na2ZrSi4O11 C 2/c 2/m

Strunz Class:

VIII/F.34-20 VIII - Silicates

VIII/F - Inosilicates (chain and band) complex chain structure. Cylindric chains and others

VIII/F.34 - Grumantite - Penkvilksite series

VIII/F.34-10 Narsarsukite Na2(Ti,Fe)Si4(O,F)11 I 4/m 4/m

VIII/F.34-20 Vlasovite Na2ZrSi4O11 C 2/c 2/m

VIII/F.34-30 Penkvilksite Na4(Ti,Zr)2[Si8O22]·4(H2O) P 2₁/c 2/m

VIII/F.34-40 Tumchaite! Na2(Zr,Sn)Si4O11·2(H2O) P 2₁/c 2/m

Other Vlasovite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Vlasovite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (MinSocAm) 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST

Search for Vlasovite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Vlasovite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Vlasovite Mineral Data :

Ask about Vlasovite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Vlasovite Specimen Label here :

Vlasovite

Na2ZrSi4O11
Dana No: 66.2.2.1 Strunz No: VIII/F.34-20
Locality:

Notes: