Zektzerite Mineral Data + Say ZEKTZERITE

General Zektzerite Information

Help on Chemical  Formula: Chemical Formula: NaLiZrSi6O15
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: NaLiZrSi6O15
Help on Environment: Environment: In miarolitic cavities and isolated grains in alkaline syenite of the Golden Horn batholith.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Washington Pass, Okanogan County, Washington, USA Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jack Zektzer (1936-), mathematician and geologist of Seattle, Washington, USA.
Help on Synonym: Synonym: ICSD 100631
  PDF 29-835
 

Zektzerite Image

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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

Help on Axial Ratios: Axial Ratios: a:b:c =0.8257:1:0.5856
Help on Cell Dimensions: Cell Dimensions: a = 14.33, b = 17.354, c = 10.164, Z = 8; V = 2,527.61 Den(Calc)= 2.78
Help on Crystal System: 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/Io): 4.85(1), 3.145(0.85), 7.19(0.78),
Click Here for Large Zektzerite Structure Window Crystal Structure:

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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

Help on Cleavage: Cleavage: [100] Perfect, [010] Perfect
Help on Color: Color: Colorless, Pink.
Help on Density: Density: 2.79
Help on Diaphaniety: Diaphaniety: Transparent
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luminescence: Luminescence: Fluorescent, Short UV=light yellow.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Zektzerite

Help on Gladstone-Dale: 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
Help on Optical Data: 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.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Zektzerite

Help on Electron Density: Electron Density:

relectron=2.71 gm/cc
note: rZektzerite =2.78 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.03538
Boson Index = 0.96462
Help on Photoelectric: Photoelectric:

PEZektzerite = 24.04 barns/electron
U=PEZektzerite x relectron= 65.12 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zektzerite is Not Radioactive

 

Zektzerite Classification

Help on  Dana Class: Dana Class: 66.3.4.2 (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.3)with chains P>2
  (66.3.4)P=6 (Tahualite group)
 
66.3.4.1 Tuhualite [](Na,K)FeFe[Si6O15] C mca 2/m 2/m 2/m
 
66.3.4.2 Zektzerite NaLiZrSi6O15 C mca 2/m 2/m 2/m
 
66.3.4.3 Emeleusite Na4Li2Fe2Si12O30 Pnna 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/F.30-10 VIII - Silicates
  VIII/F - Inosilicates (chain and band) Six chains [Si6O18]12- and six bands [Si12O30]12-
  VIII/F.30 - Zektzerite - Pellyite series
 
VIII/F.30-10 Zektzerite NaLiZrSi6O15 C mca 2/m 2/m 2/m
 
VIII/F.30-20 Tuhualite [](Na,K)FeFe[Si6O15] C mca 2/m 2/m 2/m
 
VIII/F.30-30 Pellyite Ba2Ca(Fe,Mg)2Si6O17 C mcm 2/m 2/m 2/m
 

Other Zektzerite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Zektzerite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Zektzerite

NaLiZrSi6O15
Dana No: 66.3.4.2 Strunz No: VIII/F.30-10
Locality:

 

Notes:

 

 
   
 
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