Zektzerite
A valid IMA mineral species
This page kindly sponsored by John Kashuba
About Zektzerite
Formula:
LiNaZrSi6O15
Colour:
Colourless, pink (often zoned), cream, or white
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
2.79
Crystal System:
Orthorhombic
Member of:
Name:
Named after Jack Zektzer (1936 - ), mineral collector of Seattle, Washington, USA, who presented the material for study.
Unique Identifiers
Mindat ID:
4390
Long-form identifier:
mindat:1:1:4390:4
GUID
(UUID V4):
(UUID V4):
b5bcc18f-1a4a-4375-b335-e72634e61094
IMA Classification of Zektzerite
Approved
IMA Formula:
NaLiZrSi6O15
Approval year:
1976
Classification of Zektzerite
9.DN.05
9 : SILICATES (Germanates)
D : Inosilicates
N : Inosilicates with 6-periodic double chains
9 : SILICATES (Germanates)
D : Inosilicates
N : Inosilicates with 6-periodic double chains
66.3.4.2
66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
3 : Amphiboles - Ca-Na subgroup
66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
3 : Amphiboles - Ca-Na subgroup
14.10.3
14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf
14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Zek | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Zektzerite
Vitreous
Transparency:
Translucent
Colour:
Colourless, pink (often zoned), cream, or white
Streak:
white
Hardness:
6 on Mohs scale
Cleavage:
Perfect
{100} and {010}
{100} and {010}
Density:
2.79 g/cm3 (Measured) 2.80 g/cm3 (Calculated)
Optical Data of Zektzerite
Type:
Biaxial (-)
RI values:
nα = 1.582(3) nβ = 1.584(3) nγ = 1.584(3)
Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v moderate
Chemistry of Zektzerite
Mindat Formula:
LiNaZrSi6O15
Common Impurities:
Ti,Hf
Crystallography of Zektzerite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cmca
Setting:
Cmca
Cell Parameters:
a = 14.330(2) Å, b = 17.354(2) Å, c = 10.164(2) Å
Ratio:
a:b:c = 0.826 : 1 : 0.586
Unit Cell V:
2,527.61 ų (Calculated from Unit Cell)
Z:
8
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0000638 | Zektzerite | Ghose S, Wan C (1978) Zektzerite, NaLiZrSi6O15: a silicate with six-tetrahedral-repeat double chains near Washington Pass, North Cascades, Washington, USA American Mineralogist 63 304-310 | 1978 | Miarolitic cavities of the Golden Horn batholith | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.850 Å | (100) |
3.145 Å | (85) |
7.190 Å | (78) |
4.336 Å | (78) |
3.480 Å | (75) |
2.665 Å | (63) |
4.374 Å | (47) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4a: Earth’s earliest continental crust | >4.4-3.0 |
19 : Granitic intrusive rocks |
Type Occurrence of Zektzerite
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa; Royal Ontario Museum, Toronto, Canada, M34553;
The Natural History Museum, London, England, 1976,423;
Harvard University, Cambridge, Massachusetts, 116456;
National Museum of Natural History, Washington, D.C., USA, 136030.
The Natural History Museum, London, England, 1976,423;
Harvard University, Cambridge, Massachusetts, 116456;
National Museum of Natural History, Washington, D.C., USA, 136030.
Associated Minerals at Type Locality:
Reference:
Dunn, P.J., R.C. Rouse, B. Cannon, and J.A. Nelen (1977) Zektzerite: a new lithium sodium zirconium silicate related to tuhualite and the osumilite group. American Mineralogist 62, 416-420.
Synonyms of Zektzerite
Other Language Names for Zektzerite
German:Zektzerit
Russian:Цектцерит
Simplified Chinese:硅锆钠锂石
Spanish:Zektzerita
Traditional Chinese:矽鋯鈉鋰石
Relationship of Zektzerite to other Species
Member of:
Other Members of this group:
Emeleusite | Li2Na4Fe2Si12O30 | Orth. mmm (2/m 2/m 2/m) |
Tuhualite | NaFe2+Fe3+Si6O15 | Orth. mmm (2/m 2/m 2/m) : Cmca |
Common Associates
Associated Minerals Based on Photo Data:
40 photos of Zektzerite associated with Microcline | K(AlSi3O8) |
32 photos of Zektzerite associated with Arfvedsonite | [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2 |
12 photos of Zektzerite associated with Quartz | SiO2 |
11 photos of Zektzerite associated with Sogdianite | K◻2Zr2Li3[Si12O30] |
10 photos of Zektzerite associated with Albite | Na(AlSi3O8) |
9 photos of Zektzerite associated with Aegirine | NaFe3+Si2O6 |
8 photos of Zektzerite associated with Neptunite | KNa2Li(Fe2+)2Ti2[Si4O12]2 |
6 photos of Zektzerite associated with Astrophyllite | K2NaFe2+7Ti2Si8O26(OH)4F |
4 photos of Zektzerite associated with Feldspar Group | |
4 photos of Zektzerite associated with Epididymite | Na2Be2Si6O15 · H2O |
Related Minerals - Strunz-mindat Grouping
9.DN. | Letnikovite-(Ce) | (Na◻)Ca2Ce2[Si7O17(OH)]F4(H2O)4 |
9.DN.05 | Emeleusite | Li2Na4Fe2Si12O30 |
9.DN.05 | Tuhualite | NaFe2+Fe3+Si6O15 |
9.DN.10 | Semenovite-(Ce) | Na8Ca2FeBe6Ce2Si14O40(OH)4F4 |
9.DN.15 | Ashcroftine-(Y) | K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8 · 8H2O |
9.DN.15 | Ashcroftine-(Ce) | K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8 · 8H2O |
Fluorescence of Zektzerite
Fluoresces blue, yellow in SW UV
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Zektzerite
mindat.org URL:
https://www.mindat.org/min-4390.html
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References for Zektzerite
Reference List:
Dunn, Pete J., Rouse, Roland C., Cannon, Bart, Nelen, Joseph A. (1977) Zektzerite, a new lithium sodium zirconium silicate related to tuhualite and the osumilite group. American Mineralogist, 62 (5-6) 416-420
Localities for Zektzerite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Chile | |
| Welkner +2 other references |
Finland | |
| Ani et al. (2013) |
Japan | |
| Imaoka et al. (2021) |
Madagascar | |
| presentation given at the University of ... +1 other reference |
Malawi | |
| Guastoni et al. (2008) |
Norway | |
| Kjærnet (2018) |
| Andresen et al. (2018) +1 other reference |
Andresen et al. (2018) | |
| Larsen et al. (2012) |
Tajikistan | |
| Pautov et al. (1992) |
USA (TL) | |
| Mineralogical Record +4 other references |
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Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA