Bikitaite (original) (raw)

A valid IMA mineral species - grandfathered

About BikitaiteHide

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Lustre:

Vitreous, Sub-Vitreous

Specific Gravity:

2.28 - 2.34

Name:

Named in 1957 by Cornelius Searle Hurlbut, Jr. for the type locality at Bikita, Masvingo (Fort Victoria), Masvingo, Zimbabwe (formerly Southern Rhodesia).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:670:9

3d6a5b19-cc21-4ea7-a156-a78a85511f0f

IMA Classification of BikitaiteHide

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Approved, 'Grandfathered' (first described prior to 1959)

Type description reference:

Classification of BikitaiteHide

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9.GD.55

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

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

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of BikitaiteHide

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Transparency:

Transparent, Translucent

Cleavage:

Perfect
Perfect on the {100}, Good on the {001}

Density:

2.28 - 2.34 g/cm3 (Measured) 2.3 g/cm3 (Calculated)

Optical Data of BikitaiteHide

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RI values:

_n_α = 1.510 _n_β = 1.521 _n_γ = 1.523

δ = 0.013

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Optical Extinction:

X^c = 28°, Z=b

Pleochroism:

Non-pleochroic

Chemistry of BikitaiteHide

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Mindat Formula:

LiAlSi2O6 · H2O

Crystallography of BikitaiteHide

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Cell Parameters:

a = 8.606 Å, b = 4.9573 Å, c = 7.597 Å
α = 89.89°, β = 114.42°, γ = 89.96°

Ratio:

a:b:c = 1.736 : 1 : 1.532

Morphology:

Granular; bladed crystals are rare

Comment:

Originally determined as monoclinic

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0000394	Bikitaite	Kocman V, Gait R I, Rucklidge J C (1974) The crystal structure of bikitaite, Li[AlSi2O6].H2O American Mineralogist 59 71-78		1974	0	293
0002910	Bikitaite	Ferro O, Quartieri S, Vezzalini G, Fois E, Gamba A, Tabacchi G (2002) High-pressure behaviour of bikitaite: An integrated theoretical and experimental approach American Mineralogist 87 1415-1425		2002	0	293
0002911	Bikitaite	Ferro O, Quartieri S, Vezzalini G, Fois E, Gamba A, Tabacchi G (2002) High-pressure behaviour of bikitaite: An integrated theoretical and experimental approach American Mineralogist 87 1415-1425		2002	5.7	293
0002912	Bikitaite	Ferro O, Quartieri S, Vezzalini G, Fois E, Gamba A, Tabacchi G (2002) High-pressure behaviour of bikitaite: An integrated theoretical and experimental approach American Mineralogist 87 1415-1425		2002	9	293
0003188	Bikitaite	Ferro O, Quartieri S, Vezzalini G, Ceriani C, Fois E, Gamba A, Cruciani G (2004) Dehydration dynamics of bikitaite: I. In situ synchrotron powder X-ray diffraction study American Mineralogist 89 94-101		2004	0	293
0003189	Bikitaite	Ferro O, Quartieri S, Vezzalini G, Ceriani C, Fois E, Gamba A, Cruciani G (2004) Dehydration dynamics of bikitaite: I. In situ synchrotron powder X-ray diffraction study American Mineralogist 89 94-101		2004	0	293
0003190	Bikitaite	Ferro O, Quartieri S, Vezzalini G, Ceriani C, Fois E, Gamba A, Cruciani G (2004) Dehydration dynamics of bikitaite: I. In situ synchrotron powder X-ray diffraction study American Mineralogist 89 94-101		2004	0	293
0003191	Bikitaite	Ferro O, Quartieri S, Vezzalini G, Ceriani C, Fois E, Gamba A, Cruciani G (2004) Dehydration dynamics of bikitaite: I. In situ synchrotron powder X-ray diffraction study American Mineralogist 89 94-101		2004	0	293
0006964	Bikitaite	Comodi P, Gatta G D, Zanazzi P F (2003) Effects of pressure on the structure of bikitaite European Journal of Mineralogy 15 247-255	2003	King's Mountain, North Carolina, USA	0.0001	293
0006965	Bikitaite	Comodi P, Gatta G D, Zanazzi P F (2003) Effects of pressure on the structure of bikitaite European Journal of Mineralogy 15 247-255	2003	King's Mountain, North Carolina, USA	3.2	293
0006966	Bikitaite	Comodi P, Gatta G D, Zanazzi P F (2003) Effects of pressure on the structure of bikitaite European Journal of Mineralogy 15 247-255	2003	King's Mountain, North Carolina, USA	0.0001	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Radiation - Copper Kα

Data Set:

Data courtesy of RRUFF project at University of Arizona, used with permission.

Powder Diffraction Data:

Geological EnvironmentHide

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Geological Setting:

Granite pegmatite

Type Occurrence of BikitaiteHide

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General Appearance of Type Material:

Place of Conservation of Type Material:

Harvard University, Cambridge, Massachusetts, USA, 106822.

Geological Setting of Type Material:

Associated Minerals at Type Locality:

Reference:

Hurlbut, C.S. (1957) Bikitaite, LiAlSi2O6·H2O, a new mineral from Southern Rhodesia. American Mineralogist: 42: 792-797.

Other Language Names for BikitaiteHide

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Relationship of Bikitaite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of BikitaiteHide

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

Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for BikitaiteHide

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References for BikitaiteHide

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Reference List:

Coombs, Douglas S., Alberti, Alberto, Armbruster, Thomas, Artioli, Gilberto, Colella, Carmine, Galli, Ermanno, Grice, Joel D., Liebau, Friedrich, Mandarino, Joseph A., Minato, Hideo, Nickel, Ernest H., Passaglia, Elio, Peacor, Donald R., Quartieri, Simona, Rinaldi, Romano, Ross, Malcolm I., Sheppard, Richard A., Tillmanns, Ekkehart, Vezzalini, Giovanna (1997) Recommended nomenclature for zeolite minerals; report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist, 35 (6) 1571-1606

Quartieri, S., Sani, A., Vezzalini, G., Galli, E., Fois, E., Gamba, A., Tabacchi, G. (1999) One-dimensional ice in bikitaite: single-crystal X-ray diffraction, infra-red spectroscopy and ab-initio molecular dynamics studies. Microporous and Mesoporous Materials: 30: 77-87.

Ferro, Orazio, Quartieri, Simona, Vezzalini, Giovanna, Ceriani, Chiara, Fois, Ettore, Gamba, Aldo, Cruciani, Giuseppe (2004) Dehydration dynamics of bikitaite: Part I. In situ synchrotron powder X-ray diffraction study. American Mineralogist, 89 (1) 94-101 doi:10.2138/am-2004-0112

Ceriani, C., Fois, E., Gamba, A., Tabacchi, G., Ferro, O., Quartieri, S., Vezzalini, G. (2004) Dehydration dynamics of bikitaite: Part II. Ab initio molecular dynamics study. American Mineralogist: 89(1): 102–109.

Localities for BikitaiteHide

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This 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.

Locality ListHide

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