Zektzerite Mineral Data

General Zektzerite Information

Chemical Formula:

NaLiZrSi6O15

Composition:

Molecular Weight = 529.66 gm

Sodium 4.34 % Na 5.85 % Na₂O

Lithium 1.31 % Li 2.82 % Li₂O

Zirconium 17.22 % Zr 23.26 % ZrO₂

Silicon 31.82 % Si 68.06 % SiO₂

Oxygen 45.31 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaLiZrSi₆O₁₅

Environment:

In miarolitic cavities and isolated grains in alkaline syenite of the Golden Horn batholith.

IMA Status:

Approved IMA 1977

Locality:

Washington Pass, Okanogan County, Washington, USA Link to MinDat.org Location Data.

Name Origin:

Named for Jack Zektzer (1936-), mathematician and geologist of Seattle, Washington, USA.

Name Pronunciation:

Zektzerite + Pronunciation

Synonym:

ICSD 100631

PDF 29-835

Zektzerite Image

Images:

Zektzerite

Comments: Pale peach-colored crystal of zektzerite on white feldspar.
Location: Golden Horn batholith, Okanogan County, Oregon, USA. Scale: Crystal size 1 cm.
© Dave Barthelmy

Zektzerite Crystallography

Axial Ratios:

a:b:c =0.8257:1:0.5856

Cell Dimensions:

a = 14.33, b = 17.354, c = 10.164, Z = 8; V = 2,527.61 Den(Calc)= 2.78

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mca

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

By Intensity(I/I_o): 4.85(1), 3.145(0.85), 7.19(0.78),

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

Ghose S , Wan C , American Mineralogist , 63 (1978) p.304-310, Zektzerite, NaLiZrSi6O15: a silicate with six-tetrahedral-repeat double chains, Locality: Miarolitic cavities of the Golden Horn batholith, near Washington Pass, North Cascades, Washington, USA

Physical Properties of Zektzerite

Cleavage:

{100} Perfect, {010} Perfect

Color:

Colorless, Pink.

Density:

2.79

Diaphaneity:

Transparent

Hardness:

6 - Orthoclase

Luminescence:

Fluorescent, Short UV=light yellow.

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Zektzerite

Gladstone-Dale:

CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2098,KPDmeas= 0.2091,KC= 0.2104
Ncalc = 1.59

Optical Data:

Biaxial (-), a=1.582, b=1.584, g=1.584, bire=0.0020, 2V(Calc)=0, 2V(Meas)=0. Dispersion r > v weak.

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Zektzerite

Electron Density:

Bulk Density (Electron Density)=2.71 gm/cc
note: Specific Gravity of Zektzerite =2.78 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Zektzerite= 24.04 barns/electron
U=PE_Zektzerite x rElectron Density= 65.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zektzerite is Not Radioactive

Zektzerite Classification

Dana Class:

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

(66.03)with chains P>2

(66.03.04)P=6 (Tahualite group)

66.03.04.01 Tuhualite [](Na,K)FeFe[Si6O15] C mca 2/m 2/m 2/m

66.03.04.02 Zektzerite NaLiZrSi6O15 C mca 2/m 2/m 2/m

66.03.04.03 Emeleusite Na4Li2Fe2Si12O30 Pnna 2/m 2/m 2/m

Strunz Class:

09.DN.05 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DN -Inosilicates with 6-periodic double chains

09.DN.05 Emeleusite Na4Li2Fe2Si12O30 Pnna 2/m 2/m 2/m

09.DN.05 Tuhualite [](Na,K)FeFe[Si6O15] C mca 2/m 2/m 2/m

09.DN.05 Zektzerite NaLiZrSi6O15 C mca 2/m 2/m 2/m

Other Zektzerite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Zektzerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Zektzerite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Zektzerite :

A Bijoux Google Search for Zektzerite
Adam's Minerals Google Search for Zektzerite
Cape Minerals Google Search for Zektzerite
Dakota Matrix Minerals Google Search for Zektzerite
Excalibur Mineral Corp. Google Search for Zektzerite
Exceptional Minerals Google Search for Zektzerite
John Betts Fine Minerals Search for Zektzerite
McDougall Minerals Google Search for Zektzerite
Mineral News Website Link
Rock and Mineral Shows Google Search for Zektzerite
Weinrich Minerals, Inc. Google Search for Zektzerite

Ask about Zektzerite 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 Zektzerite Specimen Label here :

Zektzerite

NaLiZrSi6O15
Dana No: 66.03.04.02 Strunz No: 09.DN.05
Locality:

Notes: