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Bikitaite

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Formula:
LiAlSi2O6 · H2O
System:
Triclinic
Colour:
Colorless, White
Hardness:
6
Member of:
Name:
Named in 1957 by Cornelius Searle Hurlbut, Jr. for the type locality at Bikita, Masvingo (Fort Victoria), Masvingo, Zimbabwe (formerly Southern Rhodesia).
Isostructural with:

Classification of Bikitaite

Approved
9.GD.55

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
D : Chains of 6-membered rings – tabular zeolites
Dana 7th ed.:
77.2.1.1
77.2.1.1

77 : TECTOSILICATES Zeolites
2 : Zeolite group - related species
16.1.6

16 : Silicates Containing Aluminum and other Metals
1 : Aluminosilicates of Li
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Type Occurrence of Bikitaite

General Appearance of Type Material:
colorless glassy grains
Year of Discovery:
1957
Geological Setting of Type Material:
Granite pegmatite
Associated Minerals at Type Locality:

Occurrences of Bikitaite

Geological Setting:
Granite pegmatite

Physical Properties of Bikitaite

Vitreous, Sub-Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colorless, White
Streak:
White
Hardness (Mohs):
6
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on the {100}, Good on the {001}
Fracture:
Conchoidal
Density:
2.28 - 2.34 g/cm3 (Measured)    2.3 g/cm3 (Calculated)

Crystallography of Bikitaite

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 8.606Å, b = 4.9573Å, c = 7.597Å
α = 89.89°, β = 114.42°, γ = 89.96°
Ratio:
a:b:c = 1.736 : 1 : 1.532
Unit Cell Volume:
V 295.11 ų
Z:
1
Morphology:
Granular; bladed crystals are rare
Comment:
Originally determined as monoclinic
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
X-Ray Powder Diffraction Data:
d-spacingIntensity
9.21 (100)
8.04 (70)
7.84 (80)
6.95 (40)
6.84 (20)
4.19 (40)
4.08 (30)
4.03 (40)
3.40 (20)

Optical Data of Bikitaite

Type:
Biaxial (-)
RI values:
nα = 1.510 nβ = 1.521 nγ = 1.523
2V:
Measured: 45°
Birefringence:
0.013
Max Birefringence:
δ = 0.013
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r
Optical Extinction:
X^c = 28°, Z=b
Pleochroism:
Non-pleochroic

Chemical Properties of Bikitaite

Formula:
LiAlSi2O6 · H2O
Essential elements:
All elements listed in formula:

Relationship of Bikitaite to other Species

Member of:
Other Members of Group:
AlflarseniteNaCa2Be3Si4O13(OH) · 2H2O
AmiciteK2Na2Al4Si4O16 · 5H2O
Ammonioleucite(NH4,K)(AlSi2O6)
AnalcimeNa2(Al2Si4O12) · 2H2O
Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2O
Beaumontite (of Lévy)
Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2O
BoggsiteCa8Na3(Si,Al)96O192 · 70H2O
Brewsterite
Brewsterite-Ba(Ba,Sr)[Al2Si6O16] · 5H2O
Brewsterite-Sr(Sr,Ba,Ca)[Al2Si6O16] · 5H2O
Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Chabazite-K(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2 · 12H2O
Chabazite-Levyne Subgroup
Chabazite-Mg(Mg0.7K0.5Ca0.5Na0.1)[Al3Si9O24]·10H2O
Chabazite-Na(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
Chabazite-SrSr2[Al2Si4O12]2 · 12H2O
ChiavenniteCaMnBe2Si5O13(OH)2 · 2H2O
Clinoptilolite-Ca(Ca,Na,K)2-3Al3(Al,Si)2Si13O36 · 12H2O
Clinoptilolite-K(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Clinoptilolite-Na(Na,K,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
CowlesiteCaAl2Si3O10 · 6H2O
Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2O
DirenzoiteNaK6MgCa2(Al13Si47O120) · 36H2O
EdingtoniteBa[Al2Si3O10] · 4H2O
EpistilbiteCaAl2Si6O16 · 5H2O
Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
Erionite-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2O
Erionite-Na(Na2,K2,Ca)2[Al4Si14O36] · 15H2O
Faujasite Subgroup
Faujasite-Ca(Ca,Na2,Mg)3.5[Al7Si17O48] · 32H2O
Faujasite-Mg(Mg,Na2,Ca)3.5[Al7Si17O48] · 32H2O
Faujasite-Na(Na2,Ca,Mg)3.5[Al7Si17O48] · 32H2O
Ferrierite
Ferrierite-K(K2,Na2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
Ferrierite-Mg(Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
Ferrierite-Na(Na2,K2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
FerrochiavenniteCa1-2Fe[(Si,Al,Be)5Be2O13(OH)2]•2H2O
Flörkeite(K3Ca2Na)[Al8Si8O32] · 12H2O
GarroniteNa2Ca5Al12Si20O64 · 27H2O
GaultiteNa4Zn2Si7O18 · 5H2O
Gismondine
Gismondine-BaBa2Al4Si4O16 · 4-6H2O
Gismondine-CaCaAl2Si2O8 · 4H2O
Gmelinite
Gmelinite-Ca(Ca,Na2)[Al2Si4O12] · 6H2O
Gmelinite-K(K2,Na2,Ca)[Al2Si4O12] · 6H2O
Gmelinite-Na(Na2,Ca)[Al2Si4O12] · 6H2O
GobbinsiteNa4(Ca,Mg,K2)Al6Si10O32 · 12H2O
Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
GoosecreekiteCa[Al2Si6O16] · 5H2O
GottardiiteNa3Mg3Ca5Al19Si117O272 · 93H2O
Harmotome(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
Heulandite-Ba(Ba,Ca,K,Na,Sr)5Al9Si27O72 · 22H2O
Heulandite-Ca(Ca,Na)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-K(K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-Na(Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-Sr(Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
HsianghualiteCa3Li2(Be3Si3O12)F2
KirchhoffiteCs(BSi2O6)
LaumontiteCaAl2Si4O12 · 4H2O
LeuciteK(AlSi2O6)
Lévyne
Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Lévyne-Na(Na2,Ca,K2)[Al2Si4O12] · 6H2O
LovdariteK2Na6Be4Si14O36•9H2O
MaricopaitePb7Ca2(Si,Al)48O100 · 32H2O
Mazzite-Mg(Mg,K,Ca)5(Si26Al10)O72 · 28H2O
Mazzite-NaNa8[Al4Si14O36]2 · 30H2O
Merlinoite(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O
MesoliteNa2Ca2Si9Al6O30 · 8H2O
Montesommaite(K,Na)9Al9Si23O64 · 10H2O
Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
MutinaiteNa3Ca4Si85Al11O192 · 60H2O
NabesiteNa2BeSi4O10 · 4H2O
NatroliteNa2Al2Si3O10 · 2H2O
Natrolite Subgroup
OffretiteKCaMg(Si13Al5)O36 · 15H2O
PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O
ParanatroliteNa2Al2Si3O10 · 3H2O
ParthéiteCaAl2Si2O8 · 2H2O
Paulingite
Paulingite-Ca(Ca,K2,Na2,Ba)5[Al10Si35O90] · 45H2O
Paulingite-K(K2,Ca,Na2,Ba)5[Al10Si35O90] · 45H2O
Paulingite-Na(Na2,K2,Ca,Ba)5[Al10Si35O90] · 45H2O
PerlialiteK9Na(Ca,Sr)[Al2Si4O12]6 · 15H2O
Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32 . 12H2O
Phillipsite-K(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Phillipsite-Na(Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] · 12H2O
Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2O
ScoleciteCaAl2Si3O10 · 3H2O
StelleriteCa4(Si28Al8)O72 · 28H2O
Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Stilbite-Na(Na,Ca,K)6-7[Al8Si28O72] · nH2O
Terranovaite(Na,Ca)8(Si68Al12)O160 · 29H2O
Tetranatrolite
Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Thomsonite-SrNa(Sr,Ca)2[Al5Si5O20] · 7H2O
Tschernichite(Ca,Na2)[Al2Si4O12] · 4-8H2O
TschörtneriteCa4(Ca,Sr,K,Ba)3Cu3[(OH)2|Al3Si3O12]4 · nH2O
WairakiteCa(Al2Si4O12) · 2H2O
WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2O
Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
WillhendersoniteKCa[Al3Si3O12] · 5H2O
YugawaraliteCaAl2Si6O16 · 4H2O
Common Associates:
9.GD.05Gmelinite-Ca(Ca,Na2)[Al2Si4O12] · 6H2O
9.GD.05Gmelinite-K(K2,Na2,Ca)[Al2Si4O12] · 6H2O
9.GD.05Gmelinite-Na(Na2,Ca)[Al2Si4O12] · 6H2O
9.GD.10WillhendersoniteKCa[Al3Si3O12] · 5H2O
9.GD.10Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-K(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-Na(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-SrSr2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-Mg(Mg0.7K0.5Ca0.5Na0.1)[Al3Si9O24]·10H2O
9.GD.15Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
9.GD.15Lévyne-Na(Na2,Ca,K2)[Al2Si4O12] · 6H2O
9.GD.20Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2O
9.GD.20Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2O
9.GD.20Erionite-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2O
9.GD.20Erionite-Na(Na2,K2,Ca)2[Al4Si14O36] · 15H2O
9.GD.25OffretiteKCaMg(Si13Al5)O36 · 15H2O
9.GD.25Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
9.GD.30Faujasite-Ca(Ca,Na2,Mg)3.5[Al7Si17O48] · 32H2O
9.GD.30Faujasite-Mg(Mg,Na2,Ca)3.5[Al7Si17O48] · 32H2O
9.GD.30Faujasite-Na(Na2,Ca,Mg)3.5[Al7Si17O48] · 32H2O
9.GD.35MaricopaitePb7Ca2(Si,Al)48O100 · 32H2O
9.GD.35Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
9.GD.40Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
9.GD.40Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2O
9.GD.45EpistilbiteCaAl2Si6O16 · 5H2O
9.GD.50Ferrierite-K(K2,Na2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
9.GD.50Ferrierite-Mg(Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
9.GD.50Ferrierite-Na(Na2,K2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
16.1.1PetaliteLiAl(Si4O10)
16.1.2SpodumeneLiAlSi2O6
16.1.3EucryptiteLiAlSiO4
16.1.4VirgiliteLiAlSi2O6
16.1.5Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
16.1.7LunijianlaiteLi0.7Al6.2(AlSi7O20)(OH,O)10
16.1.8SwineforditeLi(Al,Li,Mg)4((Si,Al)4O10)2(OH,F)4 · nH2O
16.1.9Holmquistite☐{Li2}{Mg3Al2}(Si8O22)(OH)2
16.1.13Clino-holmquistite Root Name☐{Li2}{Z32+Z23+}(Si8O22)(OH,F,Cl)2
16.1.14Magnesioholmquistite
16.1.15BityiteLiCaAl2(AlBeSi2O10)(OH)2
16.1.16SogdianiteK(□,Na)2Li3(Zr,Fe,Ti)2[Si12O30]
16.1.17SugiliteK(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]

Other Names for Bikitaite

Name in Other Languages:
German:Bikitait
Simplified Chinese:硅锂铝石
Spanish:Bikitaita

Other Information

Not fluorescent in UV, but may be associated with red-fluorescing eucryptite
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 Bikitaite

Reference List:
Neues Jahrbuch für Mineralogie, Monatshefte (1986): 241-252.

Comodi, P., G.D. Gatta, & P.F. Zanazzi (2003), Effects of pressure on the structure of bikitaite: European Journal of Mineralogy: 15: 247-255.

Internet Links for Bikitaite

Localities for Bikitaite

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.
(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.
Canada
 
  • Ontario
    • Kenora District
      • Paterson Lake Area
Tindle, A.G., Breaks, F.W., and Selway, J.B. (2002) Tourmaline in petalite-subtype gramitic pegmatites: evidence of fractionation and contamination from Pakeagama Lake and Separation Lake areas of northwestern Ontario, Canada. Canadian Mineralogist, 40, 753-788.
USA
 
  • North Carolina
    • Cleveland Co.
      • Kings Mountain District
Mineralogical Record: 1: 92.; Am Min 54 (1969), 1467-1469; Rocks and Minerals, (1985) 60:76-82; Carolina Geological Society Field Trip Guidebook 1981, 39-48
Zimbabwe
 
  • Masvingo
    • Bikita area
Fernando Brederodes specimen photo ID 629137
Amer.Min.(1958) 43, 768-770; Amer.Min.(1957) 42, 792-797
Mineral and/or Locality  
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