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Lussier, A. J., Hawthorne, F. C. (2011) Short-range constraints on chemical and structural variations in bavenite. Mineralogical Magazine, 75 (1) 213-239 doi:10.1180/minmag.2011.075.1.213

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Reference TypeJournal (article/letter/editorial)
TitleShort-range constraints on chemical and structural variations in bavenite
JournalMineralogical Magazine
AuthorsLussier, A. J.Author
Hawthorne, F. C.Author
Year2011 (February)Volume75
Issue1
PublisherMineralogical Society
DOIdoi:10.1180/minmag.2011.075.1.213Search in ResearchGate
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Mindat Ref. ID244136Long-form Identifiermindat:1:5:244136:2
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Full ReferenceLussier, A. J., Hawthorne, F. C. (2011) Short-range constraints on chemical and structural variations in bavenite. Mineralogical Magazine, 75 (1) 213-239 doi:10.1180/minmag.2011.075.1.213
Plain TextLussier, A. J., Hawthorne, F. C. (2011) Short-range constraints on chemical and structural variations in bavenite. Mineralogical Magazine, 75 (1) 213-239 doi:10.1180/minmag.2011.075.1.213
Abstract/NotesBavenite is an orthorhombic calcium beryllium aluminosilicate, a ≈ 23.2, b ≈ 5.0, c ≈ 19.4 Å, V ≈ 2250 Å3, Z = 4, that crystallizes in the space group Cmcm. The crystal structures of 24 bavenite samples from various localities worldwide were refined to R1 values from 2.4 to 7.5% based on ∼1330 unique reflections collected with Mo-Kα X-radiation on a Bruker P4 CCD single-crystal diffractometer. The composition of each crystal was determined by electron microprobe analysis. There is extensive solid-solution in bavenite according to O(2)OH– + T(4)Si4+ + T(3)Be2+ ⇌ O(2)O2– + T(4)Al3+ + T(3)Si4+, such that the general formula may be written Ca4BexSi9Al4–xO28–x(OH)x, where x ranges from 2.00 to ∼3.00 a.p.f.u. Small amounts of additional Be may be incorporated into bavenite via the substitution T(3)Be + O(2)OH– + Na + T(4)Si2 ⇌ T(3)Si + O(2)O2– + Ca + T(4)Al2. Local (short-range) bond-valence considerations indicate that Short-Range Order (SRO) should be extensive in the bavenite structure, and this is confirmed by Fourier Transform Infrared (FTIR) spectroscopy in the principal OH-stretching region and by 27Al Magic Angle Spinning Nuclear Magnetic Resonance (MAS NMR) spectroscopy. Short-range bond-valence considerations indicate that the T(3)–T(4)–T(3)–T(4) rings of the framework can incorporate any short-range arrangement of cations consonant with their site populations [T(3) = Be,Si; T(4) = Si,Al], and 27Al MAS NMR spectroscopy confirms this, showing the presence of the local clusters T(3)Be–T(4)Al–T(3)Be, T(3)Si–T(4)Al–T(3)Be and T(3)Si–T(4)Al–T(3)Si. Incorporation of Be at the T(3) site is accompanied by local replacement of O2– by (OH)– at the O(2) site and hydrogen bonding to the adjacent O(3) anion; the latter promotes Be → Si substitution at the T(3) tetrahedron adjacent in the b direction. T(3)–T(4)–T(3)–T(4) rings link in the c direction through a T(3)–(1)–(3) linkage [T(1) = Si]. Local bond-valence considerations show that occupancy of both T(3) tetrahedra by Be violates the valence-sum rule, and that the linkage T(3)Be–T(1)Si–T(3)Si provides the constraint whereby Be does not exceed 3 a.p.f.u. in bavenite when incorporated via the substitution O(2)OH– + T(4)Si4+ + T(3)Be2+ ⇌ O(2)O2– + T(4)Al3+ + T(3)Si4+.

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LocalityCitation Details
E 134 Road, Drammen, Buskerud, Norwaywith an analysis of bavenite from E 134 = Nye Rull (sic!), sample 36BAV
Himberg Quarry, Ramnes, Tønsberg, Vestfold, Norwaywith an analysis of bavenite from Himberg, sample 39BAV

Mineral Pages

MineralCitation Details
Bavenite
Bohseite

Mineral Occurrences

LocalityMineral(s)
E 134 Road, Drammen, Buskerud, Norwayⓘ Bavenite
Himberg Quarry, Ramnes, Tønsberg, Vestfold, Norwayⓘ Bavenite

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Lussier, A. J., Hawthorne, F. C., Abdu, Y., Herwig, S., Michaelis, V. K., Aguiar, P. M., Kroeker, S. (2011) The crystal chemistry of ‘wheatsheaf’ tourmaline from Mogok, Myanmar. Mineralogical Magazine, 75 (1) 65-86 doi:10.1180/minmag.2011.075.1.65
Hawthorne, Frank C. (2018) Long-range and short-range cation order in the crystal structures of carlfrancisite and mcgovernite. Mineralogical Magazine, 82 (5) 1101-1118 doi:10.1180/minmag.2017.081.098
Lussier, A. J., Cooper, M. A., Hawthorne, F. C., Kristiansen, R. (2009) Triclinic titanite from the Heftetjern granitic pegmatite, Tørdal, southern Norway. Mineralogical Magazine, 73 (5) 709-722 doi:10.1180/minmag.2009.073.5.709
CĂĄmara, F., Sokolova, E., Hawthorne, F. C. (2011) From structure topology to chemical composition. XII. Titanium silicates: the crystal chemistry of rinkite, Na2Ca4REETi(Si2O7)2OF3. Mineralogical Magazine, 75 (6) 2755-2774 doi:10.1180/minmag.2011.075.6.2755
(2011) Erratum. Mineralogical Magazine, 75 (1) 267 doi:10.1180/minmag.2011.075.1.267
Claringbull, G. F. (1940) Occurrences of bavenite in Switzerland. Mineralogical Magazine and Journal of the Mineralogical Society, 25 (168) 495-497 doi:10.1180/minmag.1940.025.168.04
Hawthorne, F. C., Groat, L. A. (1986) The crystal structure and chemical composition of cumengĂŠite. Mineralogical Magazine, 50 (355) 157-162 doi:10.1180/minmag.1986.050.355.21
Hawthorne, F. C. (2014) The structure hierarchy hypothesis. Mineralogical Magazine, 78 (4) 957-1027 doi:10.1180/minmag.2014.078.4.13
Lussier, A. J., Hawthorne, F. C., Herwig, S., Abdu, Y., Aguiar, P. M., Michaelis, V. K., Kroeker, S. (2008) Mushroom elbaite from the Kat Chay mine, Momeik, near Mogok, Myanmar: II. Zoning and crystal growth. Mineralogical Magazine, 72 (5) 999-1010 doi:10.1180/minmag.2008.072.5.999
(2011) Erratum. Mineralogical Magazine, 75 (4) 2541 doi:10.1180/minmag.2011.075.4.2541
Hutchinson, A. (1912) On the identity of Neocolemanite with Colemanite. Mineralogical Magazine and Journal of the Mineralogical Society, 16 (75) 239-246 doi:10.1180/minmag.1912.016.75.10
 
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