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Zektzerite

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Washington Pass, Golden Horn Batholith, Okanogan Co., Washington, USA
© Pavel M. Kartashov

Show Zektzerite Photos (18)
Formula:
LiNa(Zr,Ti,Hf)Si
 
6
O
 
15
System:OrthorhombicColour:Colourless, pink (often ...
Lustre:VitreousHardness:6
Name:Named after Jack Zektzer (1936- ), mineral collector of Seattle, Washington, USA, who presented the material for study.


Tuhualite Group.

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:1977

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

Related to:
  • Tuhualite Group
    • 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,Ca)
     
    9
    		Fe
    2+
     
    		(Ce,La)
     
    2
    		[(Si,Be)
     
    5
    		(O,OH,F)
     
    12
    		]
     
    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
    Zr[SiO
     
    4
    		]
    14.10.2Hafnon
    (Hf,Zr)[SiO
     
    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
    		[(OH,Cl)|Si
     
    6
    		O
     
    18
    		]·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
    		ZrSi
     
    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
    CaZr[Si
     
    2
    		O
     
    7
    		]
    14.10.20Calciocatapleiite
    CaZrSi
     
    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)[O
     
    2
    		|Si
     
    2
    		O
     
    7
    		]
    14.10.26Lovozerite
    (Na,Ca)
     
    3
    		(Zr,Ti)[Si
     
    6
    		(O,OH)
     
    18
    		]
    14.10.27Låvenite
    (Na,Ca)
     
    2
    		(Mn
    2+
     
    		,Fe
    2+
     
    		)(Zr,Ti)[(O,OH,F)
     
    2
    		|Si
     
    2
    		O
     
    7
    		]
    14.10.28Penkvilksite
    (Na,Ca)
     
    4
    		(Ti,Zr)
     
    2
    		Si
     
    8
    		O
     
    22
    		·5H
     
    2
    		O
    14.10.29Darapiosite
    KNa
     
    2
    		Li(Mn,Zn)
     
    2
    		ZrSi
     
    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
    		[O
     
    4
    		|SiO
     
    4
    		]
     
    3

    Other Names for Zektzerite

    Synonyms:
    IMA1976-034
    German names:
    Zektzerit
    Russian names:
    Цектцерит
    Spanish names:
    Zektzerita

    Other Information

    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.

    Internet Links for Zektzerite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Zektzerite in the Natural History Museum (London) online catalogue
  • Zektzerite details from Handbook of Mineralogy (PDF)
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    Localities for Zektzerite

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    (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)
    		www.koeln.netsurf.de/~w.steffens/latam.htm
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mts
        • Alayskiy (Alai) Range
    		CanMin 42:107-119 (2004)
    USA
     
    • Washington
      • Okanogan Co.
        • Golden Horn Batholith
    		[MinRec 9:253, 20:152]; Rocks and Minerals, 66:6, p. 457
    Mineral and/or Locality
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