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Ganterite

Big Photo

Lincoln Hill dumortierite deposit, Rochester District, Pershing Co., Nevada, USA
© Caltech

Formula:
(Ba,Na,K)(Al,Mg)
 
2
[(OH)
 
2
|AlSi
 
3
O
 
10
]
System:MonoclinicColour:light silverish grey
Hardness:4 - 4½
Name:For the type locality


Ba-analogue of muscovite

Classification of Ganterite

IMA status:Approved 2000
Strunz 8th edition ID:8/H.10-95
Nickel-Strunz 10th (pending) edition ID:9.EC.15

9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
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Type Occurrence of Ganterite

Type Locality:Isenwegg, Wasen Alp, Ganter valley, Simplon pass area, Brig, Wallis (Valais), Switzerland
General Appearance of Type Material:thin lath-like crystals to 0.5 mm
Geological Setting of type material:zoisite-celsian gneisses
Associated Minerals at type locality:
ZoisiteZirconQuartzEpidoteCelsian
Apatite

Physical Properties of Ganterite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:light silverish grey
Streak:white
Hardness (Mohs):4 - 4½
Hardness (Vickers):VHN100=260 kg/mm2
Tenacity:Elastic
Cleavage:Perfect
on {001}
Density (measured):3.11 g/cm3

Crystallography of Ganterite

Crystal System:Monoclinic
Cell Parameters:a = 5.212Å, b = 9.046Å, c = 19.98Å
β = 95.48°
Ratio:a:b:c = 0.576 : 1 : 2.209
Unit Cell Volume:V 937.71 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
3.88 (75)
2.60 (95)
2.57 (100)

Chemical Properties of Ganterite

Formula:
(Ba,Na,K)(Al,Mg)
 
2
[(OH)
 
2
|AlSi
 
3
O
 
10
]
All elements listed in formula:Al, Ba, H, K, Mg, Na, O, Si

Relationship of Ganterite to other Species

Related to:
  • Mica Group
    • Related Minerals - Nickel-Strunz Grouping):

    - +
    9.EC.05Minnesotaite
    (Fe,Mg)
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    9.EC.05Talc
    Mg
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    9.EC.05Willemseite
    (Ni,Mg)
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    9.EC.10Ferripyrophyllite
    Fe
     
    2
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    9.EC.10Pyrophyllite
    Al
     
    2
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    9.EC.15Boromuscovite
    KAl
     
    2
    		[(OH)
     
    2
    		|BSi
     
    3
    		O
     
    10
    		]
    9.EC.15Celadonite
    K(Mg,Fe
    2+
     
    		)(Fe
    3+
     
    		,Al)[(OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
    9.EC.15Chernykhite
    (Ba,Na)(V
    3+
     
    		,Al,Mg)
     
    2
    		[(OH)
     
    2
    		|(Si,Al)
     
    4
    		O
     
    10
    		]
    9.EC.15Montdorite
    (K,Na)
     
    2
    		(Fe
    2+
     
    		,Mn
    2+
     
    		,Mg)
     
    5
    		[(OH,F)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
     
    2
    9.EC.15Muscovite
    KAl
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.15Nanpingite
    CsAl
     
    2
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.15Paragonite
    NaAl
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.15Roscoelite
    K(V,Al)
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.15Tobelite
    (NH
     
    4
    		,K)Al
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.15Aluminoceladonite
    K(Mg,Fe
    2+
     
    		)(Al,Fe
    3+
     
    		)[(OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
    9.EC.15Chromphyllite
    K(Cr,Al)
     
    2
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.15Ferro-aluminoceladonite
    K(Fe
    2+
     
    		,Mg)(Al,Fe
    3+
     
    		)[(OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
    9.EC.15Ferroceladonite
    K(Fe
    2+
     
    		,Mg)(Fe
    3+
     
    		,Al)[(OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
    9.EC.15Chromceladonite
    K(Mg,Fe
    2+
     
    		)(Cr,Al)[(OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
    9.EC.15Tainiolite
    KLiMg
     
    2
    		[F
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
    9.EC.20Annite
    KFe
    2+
    3
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20Biotite
    9.EC.20Ephesite
    NaLiAl
     
    2
    		[(OH)
     
    2
    		|Al
     
    2
    		Si
     
    2
    		O
     
    10
    		]
    9.EC.20Hendricksite
    K(Zn,Mg,Mn
    2+
     
    		)
     
    3
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20Masutomilite
    (K,Rb)(Li,Mn
    3+
     
    		,Al)
     
    3
    		[(F,OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20Norrishite
    KLiMn
    2+
    2
    		[(OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
    9.EC.20Phlogopite
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20Polylithionite
    KLi
     
    2
    		Al[(F,OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
    9.EC.20Preiswerkite
    NaMg
     
    2
    		Al[(OH)
     
    2
    		|Al
     
    2
    		Si
     
    2
    		O
     
    10
    		]
    9.EC.20Siderophyllite
    KFe
    2+
    2
    		Al[(F,OH)
     
    2
    		|Al
     
    2
    		Si
     
    2
    		O
     
    10
    		]
    9.EC.20Tetra-ferriphlogopite
    KMg
     
    3
    		[(OH,F)
     
    2
    		|(Fe
    3+
     
    		,Al)Si
     
    3
    		O
     
    10
    		]
    9.EC.20Wonesite
    (Na,K)(Mg,fe,Al)
     
    6
    		(Al,Si)
     
    8
    		O
     
    20
    		(OH,F)
     
    4
    9.EC.20Zinnwaldite
    KLiFe
    2+
     
    		Al[(F,OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20Eastonite
    KMg
     
    2
    		Al[(OH)
     
    2
    		|Al
     
    2
    		Si
     
    2
    		O
     
    10
    		]
    9.EC.20Tetraferriannite
    KFe
    2+
    3
    		[(OH)
     
    2
    		|(Fe
    3+
     
    		,Al)Si
     
    3
    		O
     
    10
    		]
    9.EC.20Trilithionite
    K(Li,Al)
     
    3
    		[(F,OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20Fluorannite
    KFe
    2+
    3
    		[(F,OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20Shirokshinite
    KNaMg
     
    2
    		[F
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
    9.EC.20Shirozulite
    K(Mn
    2+
     
    		,Mg)
     
    3
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20Sokolovaite
    CsLi
     
    2
    		AlSi
     
    4
    		O
     
    10
    		F
     
    2
    9.EC.20Aspidolite
    NaMg
     
    3
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20Fluorophlogopite
    KMg
     
    3
    		[(F,OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.20UM2004-49-SiO:AlCsFHKLi
    (Cs,K)(Al,Li)
     
    2.6
    		[(Si,Al)
     
    4
    		O
     
    10
    		](F,OH)
     
    2
    9.EC.25Brammallite
    Na
     
    0.65
    		Al
     
    2.0
    		ٱAl
     
    0.65
    		Si
     
    3.35
    		O
     
    10
    		(OH)
     
    2
    9.EC.30Margarite
    CaAl
     
    2
    		[(OH)
     
    2
    		|Al
     
    2
    		Si
     
    2
    		O
     
    10
    		]
    9.EC.35Anandite
    (Ba,K)(Fe
    2+
     
    		,Mg)
     
    3
    		[(O,OH)
     
    2
    		|(Si,Al,Fe)
     
    4
    		O
     
    10
    		]
    9.EC.35Bityite
    CaLiAl
     
    2
    		[(OH)
     
    2
    		|BeAlSi
     
    2
    		O
     
    10
    		]
    9.EC.35Clintonite
    Ca(Mg,Al)
     
    3
    		[(OH)
     
    2
    		|Al
     
    3
    		SiO
     
    10
    		]
    9.EC.35Kinoshitalite
    (Ba,K)(Mg,Mn
    2+
     
    		,Al)
     
    3
    		[(OH)
     
    2
    		|Al
     
    2
    		Si
     
    2
    		O
     
    10
    		]
    9.EC.35Ferrokinoshitalite
    (Ba,K)(Fe
    2+
     
    		,Mg)
     
    3
    		[(OH,F)
     
    2
    		|Al
     
    2
    		Si
     
    2
    		O
     
    10
    		]
    9.EC.35Oxykinoshitalite
    (Ba,K)(Mg,Ti,Fe
    3+
     
    		,Fe
    2+
     
    		)
     
    3
    		[(O,OH,F)
     
    2
    		|(Si,Al)
     
    4
    		O
     
    10
    		]
    9.EC.40Beidellite
    (Na,Ca
     
    0.5
    		)
     
    0.3
    		Al
     
    2
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·nH
     
    2
    		O
    9.EC.40Kurumsakite
    (Zn,Ni,Cu)
     
    8
    		Al
     
    8
    		V
     
    2
    		Si
     
    5
    		O
     
    35
    		·27H
     
    2
    		O (or near)
    9.EC.40Montmorillonite
    (Na,Ca)
     
    0.33
    		(Al,Mg)
     
    2
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·nH
     
    2
    		O
    9.EC.40Nontronite
    Na
     
    0.3
    		Fe
     
    2
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·nH
     
    2
    		O
    9.EC.40Volkonskoite
    Ca
     
    0.3
    		(Cr,Mg,Fe)
     
    2
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
    9.EC.40Yakhontovite
    (Ca,Na)
     
    0.5
    		(Cu,Fe,Mg)
     
    2
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·3H
     
    2
    		O
    9.EC.40Smectite
    9.EC.45Hectorite
    Na
     
    0.3
    		(Mg,Li)
     
    3
    		Si
     
    4
    		O
     
    10
    		(F,OH)
     
    2
    9.EC.45Saponite
    Ca
     
    0.25
    		(Mg,Fe)
     
    3
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·nH
     
    2
    		O
    9.EC.45Sauconite
    Na
     
    0.3
    		Zn
     
    3
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
    9.EC.45Spadaite
    MgSiO
     
    2
    		(OH)
     
    2
    		·H
     
    2
    		O
    9.EC.45Stevensite
    (Ca,Na)
     
    x
    		Mg
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    9.EC.45Swinefordite
    Li(Al,Li,Mg)
     
    4
    		(Si,Al)
     
    8
    		O
     
    20
    		,(OH,F)
     
    4
    		·xH
     
    2
    		O
    9.EC.45Zincsilite
    Zn
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
    9.EC.45Ferrosaponite
    Ca
     
    0.3
    		(Fe
    2+
     
    		,Mg,Fe
    3+
     
    		)
     
    3
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
    9.EC.50Vermiculite
    (Mg,Fe,Al)
     
    3
    		(Al,Si)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
    9.EC.55Baileychlore
    (Zn,Fe,Al,Mg)
     
    6
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    8
    9.EC.55Chamosite
    (Fe
    2+
     
    		,Mg)
     
    5
    		Al[(OH)
     
    8
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.55Clinochlore
    (Mg,Fe
    2+
     
    		)
     
    5
    		Al[(OH)
     
    8
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.55Cookeite
    LiAl
     
    4
    		(Si
     
    3
    		Al)O
     
    10
    		(OH)
     
    8
    9.EC.55Franklinfurnaceite
    Ca
     
    2
    		FeMn
     
    3
    		MnZn
     
    2
    		Si
     
    2
    		O
     
    10
    		(OH)
     
    8
    9.EC.55Gonyerite
    (Mn,Mg)
     
    5
    		Fe(Si
     
    3
    		Fe)O
     
    10
    		(OH)
     
    8
    9.EC.55Nimite
    (Ni,Mg,Al)
     
    6
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    8
    9.EC.55Orthochamosite
    (Fe,Mg,Fe)
     
    5
    		Al(Si
     
    3
    		Al)O
     
    10
    		(OH,O)
     
    8
    9.EC.55Pennantite
    (Mn
     
    5
    		Al)(Si
     
    3
    		Al)O
     
    10
    		(OH)
     
    8
    9.EC.55Sudoite
    (Mg,Fe
    2+
     
    		)
     
    2
    		Al
     
    3
    		[(OH)
     
    8
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.55Donbassite
    Al
     
    2
    		[Al
     
    2.33
    		][Si
     
    3
    		AlO
     
    10
    		](OH)
     
    8
    9.EC.55Glagolevite
    Na(Mg,Al)
     
    6
    		[(OH,O)
     
    8
    		|AlSi
     
    3
    		O
     
    10
    		]
    9.EC.55Borocookeite
    Li
     
    1+3x
    		Al
     
    4-x
    		[(BSi
     
    3
    		)O
     
    10
    		](OH)
     
    8
    		 [0.00 <= x <=0.33]
    9.EC.60Aliettite
    Ca
     
    0.2
    		Mg
     
    6
    		(Si,Al)
     
    8
    		O
     
    20
    		(OH)
     
    4
    		·4H
     
    2
    		O
    9.EC.60Corrensite
    (Mg,Fe)
     
    9
    		(Si,Al)
     
    8
    		O
     
    20
    		(OH)
     
    10
    		·nH
     
    2
    		O
    9.EC.60Dozyite
    Mg
     
    7
    		Al
     
    2
    		[(OH)
     
    12
    		|Al
     
    2
    		Si
     
    4
    		O
     
    15
    		]
    9.EC.60Hydrobiotite
    9.EC.60Karpinskite
    (Ni,Mg)
     
    2
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    2
    9.EC.60Kulkeite
    Mg
     
    8
    		Al(AlSi
     
    7
    		)O
     
    20
    		(OH)
     
    10
    9.EC.60Lunijianlaite
    Li
     
    0.7
    		Al
     
    6.2
    		(Si
     
    7
    		AlO
     
    20
    		)(OH,O)
     
    10
    9.EC.60Rectorite
    (Na,Ca)Al
     
    4
    		(Si,Al)
     
    8
    		O
     
    20
    		(OH)
     
    4
    		·2H
     
    2
    		O
    9.EC.60Saliotite
    Li
     
    0.5
    		Na
     
    0.5
    		Al
     
    3
    		Si
     
    3
    		AlO
     
    10
    		(OH)
     
    5
    9.EC.60Tosudite
    9.EC.60Brinrobertsite
    Na
     
    0.3
    		Al
     
    4
    		[(OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
     
    2
    		 · 3.5 H
     
    2
    		O
    9.EC.65Macaulayite
    (Fe,Al)
     
    24
    		Si
     
    4
    		O
     
    43
    		(OH)
     
    2
    9.EC.70Burckhardtite
    Pb
     
    2
    		(Fe,Mn)AlTeO
     
    2
    		Si
     
    3
    		O
     
    10
    		(OH)
     
    2
    		·H
     
    2
    		O
    9.EC.75Ferrisurite
    (Pb,Ca)
     
    2-3
    		(CO
     
    3
    		)
     
    1.5-2
    		(OH,F)
     
    0.5-1
    		[(Fe,Al)
     
    2
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    		]·nH
     
    2
    		O
    9.EC.75Surite
    Pb(Pb,Ca)(CO
     
    3
    		)
     
    2
    		(Al,Fe,Mg)
     
    2
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    9.EC.75Niksergievite
    (Ba,Ca)
     
    2
    		(Al,Si)
     
    7
    		O
     
    10
    		(CO
     
    3
    		)(OH)
     
    6
    		·nH
     
    2
    		O
    9.EC.80Kegelite
    Pb
     
    12
    		(Zn,Fe)
     
    2
    		Al
     
    4
    		(SO
     
    4
    		)
     
    4
    		Si
     
    11
    		O
     
    38
    		 or near

    Other Names for Ganterite

    Synonyms:
    IMA2000-033
    Other Languages:
    German:Ganterit

    Other Information

    Fluorescence in UV light:none
    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 Ganterite

    Reference List:Graeser S., Hetherington C.J., Gieré R. (2003), Ganterite, a new barium-dominant analogue of muscovite from the Berisal Complex, Simplon Region, Switzerland: Canadian Mineralogist: 41, 1271-1280.

    Hetherington C.J., R. Giere and S. Graeser (2003), Composition of barium-rich white micas from the Berisal Complex, Smon Regon, Switzerland: Canadian Mineralogist: 41, 1281-1291.

    Graeser S., Hetherington C.J. (2004), Lapis 29(2), 37-40.

    Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 131: 47-52.

    Ma, Chi & George R. Rossman (2006): Ganterite, the barium mica Ba0.5K0.5Al2(Al1.5Si2.5)O10(OH)2, from Oreana, Nevada. American Mineralogist: 91: 702-705.

    Articles/Blogs about Ganterite

    Internet Links for Ganterite

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  • Raman and XRD data at RRUFF project
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    Localities for Ganterite

    (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.
    Switzerland
     
    • Wallis (Valais)
      • Brig
        • Simplon pass area
          • Ganter valley
            • Wasen Alp
    		Can Min (2003) 41 (5), 1271-1280, 1281-1291; Lapis 29(2), 37-40 (2004)
    USA
     
    • Nevada
      • Pershing Co.
        • Rochester District
    		Ma, C. & Rossman, G.R. (2006)
    Mineral and/or Locality
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