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beryllophosphates

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Journal Article
Published: 01 April 2014
The Canadian Mineralogist (2014) 52 (2): 337–350.
...Fabrice Dal Bo; Frédéric Hatert; Maxime Baijot Abstract Four beryllophosphates with general formula M 2+ Be 2 P 2 O 8 ( M 2+ = Ca, Sr, Pb, Ba) have been synthesized under hydrothermal conditions at 200 °C. Their crystal structures were solved by direct methods and refined by full-matrix least...
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Journal Article
Published: 01 October 2002
The Canadian Mineralogist (2002) 40 (5): 1339–1345.
... pegmatite bodies, either as replacements of early Be-bearing phases such as beryl, or in miarolitic cavities. Many of the minerals concerned (phosphates of beryllium and beryllophosphates of a great variety of cations) are extremely rare, known only from their type localities. To date, the overall number...
FIGURES
Journal Article
Published: 01 August 1992
American Mineralogist (1992) 77 (7-8): 848–856.
... tetrahedral ring is a recurring motif in beryllophosphate structures. Bond valence analysis provides a valuable tool in understanding the tetrahedral linkages in beryllophosphate structures. When used in conjunction with the Be/P ratio, it can place limitations on the possible linkages in unknown...
Journal Article
Published: 01 August 1987
American Mineralogist (1987) 72 (7-8): 816–820.
... , with a = 11.655(5), c = 4.692(2) Å, and Z = 1. Tiptopite is isotypic with the members of the cancrinite group, being the beryllophosphate analogue of basic (hydroxyl) cancrinite, and could therefore be considered a zeolite. The tetrahedral framework is geometrically identical to that of cancrinite but is composed...
Journal Article
Published: 01 October 1989
American Mineralogist (1989) 74 (9-10): 1195–1202.
...Roland C. Rouse; Donald R. Peacor; Stefano Merlino Abstract The beryllophosphate mineral pahasapaite, (Ca 5.5 Li 3.6 K 1.2 Na 0.2 □ 13.5 )Li 8 Be 24 P 24 O 96 ·38H 2 O is cubic, I 23, with a = 13.781(4) Å and Z = 1. Its structure, which has been refined to residuals of 0.047 (unweighted) and 0.035...
Journal Article
Published: 01 October 1983
American Mineralogist (1983) 68 (9-10): 1022–1028.
Image
Comparison between the double crankshaft chains in (a) <span class="search-highlight">beryllophosphates</span> an...
Published: 01 April 2014
Fig. 7 Comparison between the double crankshaft chains in (a) beryllophosphates and (b) borosilicates.
Journal Article
Published: 21 December 2020
The Canadian Mineralogist (2020) 58 (6): 815–827.
...Frédéric Hatert; Fabrice Dal Bo; Yannick Bruni; Nicolas Meisser; Pietro Vignola; Andrea Risplendente; François-Xavier Châtenet; Julien Lebocey ABSTRACT Limousinite, ideally BaCa[Be 4 P 4 O 16 ]·6H 2 O, is a new beryllophosphate mineral discovered in the Vilatte-Haute pegmatite, Chanteloube near...
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Image
Be–P linkages for (a) the <span class="search-highlight">beryllophosphate</span> framework structure of babefphit...
Published: 01 December 2000
F ig . 6. Be–P linkages for (a) the beryllophosphate framework structure of babefphite and (b) the cluster for gainesite. The (BeO 4 ) tetrahedra have a cross pattern, and the (PO 4 ) tetrahedra are indicated with dashed lines.
Image
Variations of (a) the mean  M  2+ –O bond lengths and (b) the unit-cell par...
Published: 01 April 2014
Fig. 5 Variations of (a) the mean M 2+ –O bond lengths and (b) the unit-cell parameters as a function of the ionic radius of the M 2+ cation in the synthetic M 2+ Be 2 P 2 O 8 beryllophosphates.
Image
The crystal structure of  M  2+ Be 2 P 2 O 8  ( M  2+  = Ca, Sr, Pb) beryll...
Published: 01 April 2014
Fig. 2 The crystal structure of M 2+ Be 2 P 2 O 8 ( M 2+ = Ca, Sr, Pb) beryllophosphates. (a) View nearly perpendicular to the a axis. (b) Detailed view of the four- and eight-membered rings with tetrahedra pointed upward (U) and downward (D). (c) Detailed view of the double crankshaft
Journal Article
Published: 26 June 2017
European Journal of Mineralogy (2017) 29 (5): 923–930.
..., based on single-crystal X-ray diffraction data, to R 1 = 4.58%; the beryllophosphate framework is similar to that occurring in pahasapaite, and is based on zeolite-RHO cages. The mineral species and name were approved by the Commission on New Minerals, Nomenclature and Classification...
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Journal Article
Published: 22 June 2015
The Canadian Mineralogist (2015) 53 (2): 199–208.
.... The crystal structures of fransoletite and parafransoletite also contain beryllophosphate chains topologically identical to that found in faheyite, although the [Be(PO 4 )(PO 3 OH)] chain in fransoletite and parafransoletite is straight, whereas the [Be(PO 4 ) 2 ] chain in faheyite forms a helix about...
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Journal Article
Published: 01 November 2005
European Journal of Mineralogy (2005) 17 (6): 813–818.
...) Å 3 (ZnPO 4 -CAN). Both phases are basic cancrinites. Their channel filling is compared with naturally occurring beryllophosphate cancrinite tiptopite and a previously described ZnPO4 cancrinite, which was prepared in a high temperature synthesis with a large number of different cations. CoPO 4 -CAN...
FIGURES
Journal Article
Published: 01 August 1992
American Mineralogist (1992) 77 (7-8): 843–847.
... is biaxial positive with α = 1.562(2), β = 1.564(2), γ = 1.588(2); Euler angles are ϕ = 98°, θ = 85°, ψ = −13°; 2 V (calc) = 33°. Parafransoletite, like most beryllophosphate minerals, results from the reaction of beryl with P-bearing hydrothermal solutions. The formation of these minerals is probably highly...
Journal Article
Published: 01 December 2000
The Canadian Mineralogist (2000) 38 (6): 1425–1432.
...F ig . 6. Be–P linkages for (a) the beryllophosphate framework structure of babefphite and (b) the cluster for gainesite. The (BeO 4 ) tetrahedra have a cross pattern, and the (PO 4 ) tetrahedra are indicated with dashed lines. ...
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Journal Article
Published: 01 October 2011
The Canadian Mineralogist (2011) 49 (5): 1175–1187.
..., particularly in granitic pegmatites ( Černý 2002 ). Beryllophosphates, such as hydroxylherderite and beryllonite, are commonly known as products of the alteration of primary beryl from various pegmatite subtypes ( e.g., Nysten & Gustafsson 1993 , Černá et al. 2002 , Cempírek & Novák 2006...
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Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 50 (1): 405–444.
... other locality. Weinebenite , Ca[Be 3 (PO 4 ) 2 (OH) 2 ]·5H 2 O, is known only from its type locality , the Weinebene pegmatites in Carinthia, Austria ( Walter et al. 1990 ). Weinebenite has a tetrahedral beryllophosphate framework, with three-membered rings of tetrahedra, and Ca plus H 2 O...
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Journal Article
Published: 08 April 2021
The Canadian Mineralogist (2020) 58 (6): 863–866.
... Hatert, F., Dal Bo, F., Bruni, Y., Meisser, N., Vignola, P., Risplendente, A., Châtenet, F.-X., & Lebocey, J., Limousinite, BaCa[Be 4 P 4 O 16 ]·6H 2 O, a new beryllophosphate mineral with a phillipsite-type framework, 815 Hatert, F. with Galliski, M.A., 733 Hawthorne, F.C. with Day, M.C...
Journal Article
Published: 01 June 2014
European Journal of Mineralogy (2014) 26 (3): 371–380.
... ): Hydrothermal synthesis and low temperature crystal structure of an ammonium beryllophosphate with the merlinoite topology . Micropor. Mesopor. Mat. , 26 , 61 – 66 . Della Ventura G. Parodi G.C. Burragato F. Mottana A. ( 1993 ): Nuovi dati sulla merlinoite e su zeoliti affini...
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