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Zektzerite

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Big Photo

Washington Pass, Golden Horn Batholith, Okanogan Co., Washington, USA
© Jeff Scovil

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Formula:
LiNa(Zr,Ti,Hf)Si
 
6
O
 
15
System:OrthorhombicColour:Colourless, pink (often ...
Lustre:VitreousHardness:6
Member of:Tuhualite Group
Name:Named after Jack Zektzer (1936 - ), mineral collector of Seattle, Washington, USA, who presented the material for study.


Tuhualite Group.

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Classification of Zektzerite

IMA status:Approved 1976
Strunz 8th edition ID:8/F.30-10
Nickel-Strunz 10th (pending) edition ID:9.DN.05

9 : SILICATES (Germanates)
D : Inosilicates
N : Inosilicates with 6-periodic double chains
Dana 8th edition ID:66.3.4.2

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
3 : Amphiboles - Ca-Na subgroup
Hey's CIM Ref.:14.10.3

14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf
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Type Occurrence of Zektzerite

Type Locality:Washington Pass, Golden Horn Batholith, Okanogan Co., Washington, USA
Year of Discovery:1976

Physical Properties of Zektzerite

Lustre:Vitreous
Colour:Colourless, pink (often zoned)
Hardness (Mohs):6

Crystallography of Zektzerite

Crystal System:Orthorhombic
Cell Parameters:a = 14.3Å, b = 17.33Å, c = 10.14Å
Ratio:a:b:c = 0.825 : 1 : 0.585
Unit Cell Volume:V 2,512.88 ų (Calculated from Unit Cell)

Optical Data of Zektzerite

Type:Biaxial (-)
RI values: nα = 1.582 nβ = 1.584 nγ = 1.584
Maximum Birefringence:δ = 0.002

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v moderate

Chemical Properties of Zektzerite

Formula:
LiNa(Zr,Ti,Hf)Si
 
6
O
 
15
Essential elements:Li, Na, O, Si, Zr
All elements listed in formula:Hf, Li, Na, O, Si, Ti, Zr
Common Impurities:Ti,Hf

Relationship of Zektzerite to other Species

Member of:Tuhualite Group
Other Members of Group:

- +
Emeleusite
Li
 
2
Na
 
4
Fe
 
2
Si
 
12
O
 
30
Tuhualite
(Na,K)
 
2
Fe
 
2
Fe
 
2
Si
 
12
O
 
30
 · H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
9.DN.05Emeleusite
Li
 
2
Na
 
4
Fe
 
2
Si
 
12
O
 
30
9.DN.05Tuhualite
(Na,K)
 
2
Fe
 
2
Fe
 
2
Si
 
12
O
 
30
 · H
 
2
O
9.DN.10Semenovite-(Ce)
Na
 
8
Ca
 
2
FeBe
 
6
Ce
 
2
Si
 
14
O
 
40
(OH)
 
4
F
 
4
9.DN.15Ashcroftine-(Y)
K
 
5
Na
 
5
(Y,Ca)
 
12
Si
 
28
O
 
70
(OH)
 
2
(CO
 
3
)
 
8
 · 8H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.10.1Zircon
ZrSiO
 
4
14.10.2Hafnon
HfSiO
 
4
14.10.4Parakeldyshite
Na
 
2
ZrSi
 
2
O
 
7
14.10.5Vlasovite
Na
 
2
ZrSi
 
4
O
 
11
14.10.6Keldyshite
(Na,H)
 
2
ZrSi
 
2
O
 
7
14.10.7Gaidonnayite
Na
 
2
Zr(Si
 
3
O
 
9
) · 2H
 
2
O
14.10.8Terskite
Na
 
4
ZrSi
 
6
O
 
16
 · 2H
 
2
O
14.10.9Elpidite
Na
 
2
ZrSi
 
6
O
 
15
 · 3H
 
2
O
14.10.10Hilairite
Na
 
2
Zr[SiO
 
3
]
 
3
 · 3H
 
2
O
14.10.11Petarasite
Na
 
5
Zr
 
2
(Si
 
6
O
 
18
)(Cl,OH) · 2H
 
2
O
14.10.12Khibinskite
K
 
2
ZrSi
 
2
O
 
7
14.10.13Wadeite
K
 
2
Zr(Si
 
3
O
 
9
)
14.10.14Dalyite
K
 
2
ZrSi
 
6
O
 
15
14.10.15Kostylevite
K
 
2
Zr(Si
 
3
O
 
9
) · H
 
2
O
14.10.16Umbite
K
 
2
(Zr,Ti)Si
 
3
O
 
9
 · H
 
2
O
14.10.17Paraumbite
K
 
3
Zr
 
2
H(Si
 
3
O
 
9
)
 
2
 · nH
 
2
O
14.10.18Georgechaoite
NaKZr[Si
 
3
O
 
9
] · 2H
 
2
O
14.10.19Gittinsite
CaZrSi
 
2
O
 
7
14.10.20Calciocatapleiite
CaZr(Si
 
3
O
 
9
) · 2H
 
2
O
14.10.21Calciohilairite
CaZr[SiO
 
3
]
 
3
 · 3H
 
2
O
14.10.22Armstrongite
CaZr[Si
 
6
O
 
15
] · 3H
 
2
O
14.10.23Lemoynite
(Na,K)
 
2
CaZr
 
2
Si
 
10
O
 
26
 · 5H
 
2
O
14.10.24Catapleiite
Na
 
2
Zr(Si
 
3
O
 
9
) · 2H
 
2
O
14.10.25Baghdadite
Ca
 
3
(Zr,Ti)(Si
 
2
O
 
7
)O
 
2
14.10.26Lovozerite
Na
 
2
CaZr(H
 
4
Si
 
6
O
 
18
) · H
 
2
O
14.10.27Låvenite
(Na,Ca)
 
2
(Mn
2+
 
,Fe
2+
 
)(Zr,Ti)(Si
 
2
O
 
7
)(O,OH,F)
 
2
14.10.28Penkvilksite
Na
 
4
Ti
 
2
Si
 
8
O
 
22
 · 4H
 
2
O
14.10.29Darapiosite
KNa
 
2
(Zn,Li)
 
3
(Mn,Zr)
 
2
[Si
 
12
O
 
30
]
14.10.30Bazirite
BaZr(Si
 
3
O
 
9
)
14.10.31Komkovite
BaZr[Si
 
3
O
 
9
] · 3H
 
2
O
14.10.32Zirsinalite
Na
 
6
(Ca,Mn
2+
 
,Fe
2+
 
)Zr(Si
 
6
O
 
18
)
14.10.33Tranquillityite
(Fe
2+
 
,Ca)
 
8
(Zr,Y)
 
2
Ti
 
3
(SiO
 
4
)
 
3
O
 
4

Other Names for Zektzerite

Synonyms:
IMA1976-034
Other Languages:
German:Zektzerit
Russian:Цектцерит
Spanish:Zektzerita

Other Information

Fluorescence in UV light:Fluoresces blue in SW UV
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Zektzerite

Reference List:

- +
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.

Ghose, S. and C. Wan (1978) Zektzerite, NaLiZrSi6O15: a silicate with six-tetrahedral-repeat double chains. American Mineralogist 63, 304-310.

Pautov, L. A.; Ignatenko, K. I. (1992) Zektzerite - occurrence in Tadzhikistan. Mineralogicheskii Zhurnal 14, 75-78 (in Russian).

Internet Links for Zektzerite

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    • Localities for Zektzerite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Chile
     
    • Aisén del General Carlos Ibáñez del Campo Region
      • Aisén Province (Aysén Province)
    		Welkner, Daniela; Godoy, Estanislao; Bernhardt, Heinz-J. (2002): Peralkaline rocks in the Late Cretaceous Del Salto Pluton, Eastern Patagonian Andes, Aisen, Chile (47° 35'S). Revista Geologica de Chile 29, 3-15.
    Madagascar
     
    • Antsiranana Province
      • Diana Region (Northern Region)
        • Ambanja District
          • Ampasindava Peninsula
    		G. Estrade et al. (2011): HFSE enrichment in a peralkaline granite related skarn, Ampasindava Peninsula, Madagascar.- University of Toulouse, France; presentation given at the University of Tübingen.
    Norway
     
    • Vestfold
      • Sandefjord
        • Haneholmveien
    		Larsen, K. E. & Kolitsch, U. (2012): An unique mineral suite in a syenite pegmatite at Virikkollen, Sandefjord, Larvik Plutonic Complex, Norway. Norsk Bergverksmuseum Skrifter. 49, 35-44
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mts
        • Alai (Alayskiy) Range
    		Pautov, L. A.; Ignatenko, K. I. (1992): Zektzerite - occurrence in Tadzhikistan. Mineralogicheskii Zhurnal 14, 75-78 (in Russian).; Can. Mineral. 42: 107-119 (2004)
    USA
     
    • Washington
      • Okanogan Co.
        • Golden Horn Batholith
    		[MinRec 9:253, 20:152]; Rocks and Minerals, 66:6, p. 457; American Mineralogist, V.73, p.1191-1194
    Mineralogical Record 40:328
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