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Ganterite

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Formula:
(Ba,Na,K)(Al,Mg)2(AlSi3O10)(OH)2
System:
Monoclinic
Colour:
light silverish grey
Hardness:
4 - 4½
Member of:
Name:
For the type locality
Mica Group.

The Ba-analogue of muscovite.

Classification of Ganterite

Approved 2000
9.EC.15

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

General Appearance of First Recorded Material:
thin lath-like crystals to 0.5 mm
Geological Setting of First Recorded Material:
zoisite-celsian gneisses
Associated Minerals at First Recorded Locality:

Physical Properties of Ganterite

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:
3.11 g/cm3 (Measured)    

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 Data:
d-spacingIntensity
3.88 (75)
2.60 (95)
2.57 (100)
1.50 (90)

Chemical Properties of Ganterite

Formula:
(Ba,Na,K)(Al,Mg)2(AlSi3O10)(OH)2
Essential elements:
All elements listed in formula:

Relationship of Ganterite to other Species

Member of:
Other Members of Group:
AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
Anandite(Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2
AnniteKFe32+(AlSi3O10)(OH)2
Annite-Phlogopite Series
AspidoliteNaMg3(AlSi3O10)(OH)2
BalestraiteKLi2V5+Si4O12
Biotite
BityiteLiCaAl2(AlBeSi2O10)(OH)2
BoromuscoviteKAl2(BSi3O10)(OH)2
Brammallite(Na,H3O)(Al,Mg,Fe)2((Si,Al)4O10)(OH)2
CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Chernykhite(Ba,Na)(V3+,Al,Mg)2((Si,Al)4O10)(OH)2
ChromceladoniteK(Mg,Fe2+)(Cr,Al)(Si4O10)(OH)2
ChromphylliteK(Cr,Al)2(AlSi3O10)(OH,F)2
ClintoniteCa(Mg,Al)3(Al3SiO10)(OH)2
EastoniteKMg2Al(Al2Si2O10)(OH)2
EphesiteLiNaAl2(Al2Si2O10)(OH)2
FerroaluminoceladoniteK(Fe2+,Mg)(Al,Fe3+)(Si4O10)(OH)2
FerroceladoniteK(Fe2+,Mg)(Fe3+,Al)(Si4O10)(OH)2
Ferrokinoshitalite(Ba,K)(Fe2+,Mg)3(Al2Si2O10)(OH,F)2
FluoranniteKFe32+(AlSi3O10)(F,OH)2
FluorophlogopiteKMg3(AlSi3O10)(F,OH)2
Glauconite(K,Na)(Fe3+,Al,Mg)2(Si,Al,Fe3+)4O10)(OH)2
HendricksiteK(Zn,Mg,Mn2+)3(AlSi3O10)(OH)2
IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kinoshitalite(Ba,K)(Mg,Mn2+,Al)3(Al2Si2O10)(OH)2
Lepidolite
LuanshiweiiteKLiAl1.5□0.5(Si3.5Al0.5)O10(OH,F)2
MargariteCaAl2(Al2Si2O10)(OH)2
Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2
Montdorite(K,Na)2(Fe2+,Mn2+,Mg)5(Si4O10)2(OH,F)4
MuscoviteKAl2(AlSi3O10)(OH)2
Muscovite-Celadonite Series
NanpingiteCsAl2(AlSi3O10)(OH,F)2
Natro-glauconite(Na,K)(Fe3+,Al,Mg)2((Si,Al)4O10)(OH)2
NorrishiteKLiMn23+(Si4O10)O2
Oxykinoshitalite(Ba,K)(Mg,Ti,Fe3+,Fe2+)3((Si,Al)4O10)(O,OH,F)2
OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
ParagoniteNaAl2(AlSi3O10)(OH)2
Phengite
PhlogopiteKMg3(AlSi3O10)(OH,F)2
PolylithioniteKLi2Al(Si4O10)(F,OH)2
PreiswerkiteNaMg2Al(Al2Si2O10)(OH)2
RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
ShirokshiniteKNaMg2(Si4O10)F2
ShirozuliteK(Mn2+,Mg)3(AlSi3O10)(OH)2
SiderophylliteKFe22+Al(Al2Si2O10)(OH)2
SokolovaiteCsLi2Al(Si4O10)F2
Suhailite(NH4)Fe32+(AlSi3O10)(OH)2
TainioliteKLiMg2(Si4O10)F2
TetraferrianniteKFe32+((Fe3+,Al)Si3O10)(OH)2
TetraferriphlogopiteKMg3(Fe3+Si3O10)(OH,F)2
Tobelite(NH4,K)Al2(AlSi3O10)(OH)2
TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2
VoloshiniteRb(LiAl1.51.5)(Al0.5Si3.5)O10F2
Wonesite(Na,K)(Mg,Fe,Al)6((Al,Si)4O10)2(OH,F)4
YangzhumingiteKMg2.5(Si4O10)F2
ZinnwalditeKLiFe2+Al(AlSi3O10)(F,OH)2
9.EC.05Minnesotaite(Fe,Mg)3(Si4O10)(OH)2
9.EC.05TalcMg3(Si4O10)(OH)2
9.EC.05Willemseite(Ni,Mg)3(Si4O10)(OH)2
9.EC.10FerripyrophylliteFe23+(Si4O10)(OH)2
9.EC.10PyrophylliteAl2(Si4O10)(OH)2
9.EC.15BoromuscoviteKAl2(BSi3O10)(OH)2
9.EC.15CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
9.EC.15Chernykhite(Ba,Na)(V3+,Al,Mg)2((Si,Al)4O10)(OH)2
9.EC.15Montdorite(K,Na)2(Fe2+,Mn2+,Mg)5(Si4O10)2(OH,F)4
9.EC.15MuscoviteKAl2(AlSi3O10)(OH)2
9.EC.15NanpingiteCsAl2(AlSi3O10)(OH,F)2
9.EC.15ParagoniteNaAl2(AlSi3O10)(OH)2
9.EC.15RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
9.EC.15Tobelite(NH4,K)Al2(AlSi3O10)(OH)2
9.EC.15AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
9.EC.15ChromphylliteK(Cr,Al)2(AlSi3O10)(OH,F)2
9.EC.15FerroaluminoceladoniteK(Fe2+,Mg)(Al,Fe3+)(Si4O10)(OH)2
9.EC.15FerroceladoniteK(Fe2+,Mg)(Fe3+,Al)(Si4O10)(OH)2
9.EC.15ChromceladoniteK(Mg,Fe2+)(Cr,Al)(Si4O10)(OH)2
9.EC.15TainioliteKLiMg2(Si4O10)F2
9.EC.20AnniteKFe32+(AlSi3O10)(OH)2
9.EC.20EphesiteLiNaAl2(Al2Si2O10)(OH)2
9.EC.20HendricksiteK(Zn,Mg,Mn2+)3(AlSi3O10)(OH)2
9.EC.20Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2
9.EC.20NorrishiteKLiMn23+(Si4O10)O2
9.EC.20PhlogopiteKMg3(AlSi3O10)(OH,F)2
9.EC.20PolylithioniteKLi2Al(Si4O10)(F,OH)2
9.EC.20PreiswerkiteNaMg2Al(Al2Si2O10)(OH)2
9.EC.20SiderophylliteKFe22+Al(Al2Si2O10)(OH)2
9.EC.20TetraferriphlogopiteKMg3(Fe3+Si3O10)(OH,F)2
9.EC.20FluorotetraferriphlogopiteKMg3(Fe3+Si3O10)F2
9.EC.20Wonesite(Na,K)(Mg,Fe,Al)6((Al,Si)4O10)2(OH,F)4
9.EC.20EastoniteKMg2Al(Al2Si2O10)(OH)2
9.EC.20TetraferrianniteKFe32+((Fe3+,Al)Si3O10)(OH)2
9.EC.20TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2
9.EC.20FluoranniteKFe32+(AlSi3O10)(F,OH)2
9.EC.20ShirokshiniteKNaMg2(Si4O10)F2
9.EC.20ShirozuliteK(Mn2+,Mg)3(AlSi3O10)(OH)2
9.EC.20SokolovaiteCsLi2Al(Si4O10)F2
9.EC.20AspidoliteNaMg3(AlSi3O10)(OH)2
9.EC.20FluorophlogopiteKMg3(AlSi3O10)(F,OH)2
9.EC.20UM2004-49-SiO:AlCsFHKLi(Cs,K)(Al,Li)2.6((Si,Al)4O10)(F,OH)2
9.EC.20Suhailite(NH4)Fe32+(AlSi3O10)(OH)2
9.EC.20YangzhumingiteKMg2.5(Si4O10)F2
9.EC.20OrloviteKLi2Ti(Si4O10)OF
9.EC.20OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
9.EC.25Brammallite(Na,H3O)(Al,Mg,Fe)2((Si,Al)4O10)(OH)2
9.EC.30MargariteCaAl2(Al2Si2O10)(OH)2
9.EC.35Anandite(Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2
9.EC.35BityiteLiCaAl2(AlBeSi2O10)(OH)2
9.EC.35ClintoniteCa(Mg,Al)3(Al3SiO10)(OH)2
9.EC.35Kinoshitalite(Ba,K)(Mg,Mn2+,Al)3(Al2Si2O10)(OH)2
9.EC.35Ferrokinoshitalite(Ba,K)(Fe2+,Mg)3(Al2Si2O10)(OH,F)2
9.EC.35Oxykinoshitalite(Ba,K)(Mg,Ti,Fe3+,Fe2+)3((Si,Al)4O10)(O,OH,F)2
9.EC.35FluorokinoshitaliteBaMg3(Al2Si2O10)F2
9.EC.40Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
9.EC.40Kurumsakite(Zn,Ni,Cu)8Al8V25+Si5O35 · 27H2O (?)
9.EC.40Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
9.EC.40NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
9.EC.40VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
9.EC.40Yakhontovite(Ca,Na)0.5(Cu,Fe,Mg)2(Si4O10)(OH)2 · 3H2O
9.EC.45HectoriteNa0.3(Mg,Li)3(Si4O10)(F,OH)2
9.EC.45SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
9.EC.45SauconiteNa0.3Zn3((Si,Al)4O10)(OH)2 · 4H2O
9.EC.45SpadaiteMgSiO2(OH)2 · H2O (?)
9.EC.45Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2
9.EC.45SwineforditeLi(Al,Li,Mg)4((Si,Al)4O10)2(OH,F)4 · nH2O
9.EC.45ZincsiliteZn3(Si4O10)(OH)2 · 4H2O
9.EC.45FerrosaponiteCa0.3(Fe2+,Mg,Fe3+)3((Si,Al)4O10)(OH)2 · 4H2O
9.EC.50Vermiculite(Mg,Fe,Al)3((Al,Si)4O10)(OH)2 · 4H2O
9.EC.55Baileychlore(Zn,Fe,Al,Mg)6((Si,Al)4O10)(OH)8
9.EC.55Chamosite(Fe2+,Mg)5Al(AlSi3O10)(OH)8
9.EC.55Clinochlore(Mg,Fe2+)5Al(AlSi3O10)(OH)8
9.EC.55Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
9.EC.55FranklinfurnaceiteCa2Fe3+Mn32+Mn3+(Zn2Si2O10)(OH)8
9.EC.55Gonyerite(Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8
9.EC.55Nimite(Ni,Mg,Al)6((Si,Al)4O10)(OH)8
9.EC.55Orthochamosite(Fe2+,Mg,Fe3+)5Al(AlSi3O10)(OH,O)8
9.EC.55PennantiteMn52+Al(AlSi3O10)(OH)8
9.EC.55Sudoite(Mg,Fe2+)2Al3(AlSi3O10)(OH)8
9.EC.55DonbassiteAl4.33(AlSi3O10)(OH)8
9.EC.55GlagoleviteNa(Mg,Al)6(AlSi3O10)(OH,O)8
9.EC.55BorocookeiteLi1+3xAl4-x(BSi3O10)(OH)8
9.EC.60AliettiteCa0.2Mg6((Si,Al)8O20)(OH)4 · 4H2O
9.EC.60Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
9.EC.60DozyiteMg7Al2(Al2Si4O15)(OH)12
9.EC.60HydrobiotiteK(Mg,Fe2+)6((Si,Al)8O20)(OH)4 · nH2O
9.EC.60Karpinskite(Ni,Mg)2Si2O5(OH)2 (?)
9.EC.60KulkeiteMg8Al(AlSi7O20)(OH)10
9.EC.60LunijianlaiteLi0.7Al6.2(AlSi7O20)(OH,O)10
9.EC.60Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
9.EC.60Saliotite(Li,Na)Al3(AlSi3O10)(OH)5
9.EC.60TosuditeNa0.5(Al,Mg)6((Si,Al)8O18)(OH)12 · 5H2O
9.EC.60BrinrobertsiteNa0.3Al4(Si4O10)2(OH)4 · 3.5 H2O
9.EC.65Macaulayite(Fe,Al)24Si4O43(OH)2
9.EC.70BurckhardtitePb2(Fe3+Te6+)[AlSi3O8]O6
9.EC.75Ferrisurite(Pb,Ca)2.4Fe23+(Si4O10)(CO3)1.7(OH)3 · nH2O
9.EC.75Surite(Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2
9.EC.75Niksergievite(Ba,Ca)2Al3(AlSi3O10)(CO3)(OH)6 · nH2O
9.EC.80KegelitePb8Al4(Si8O20)(SO4)2(CO3)4(OH)8

Other Names for Ganterite

Name in Other Languages:
German:Ganterit
Simplified Chinese:钡云母
Traditional Chinese:鋇雲母

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.

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.

Internet Links for Ganterite

Localities for Ganterite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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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