1-20 OF 47 RESULTS FOR

beryllophosphate

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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: 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...
FIGURES | View All (6)
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...
FIGURES | View All (5)
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 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 1983
American Mineralogist (1983) 68 (9-10): 1022–1028.
Journal Article
Published: 01 October 2002
The Canadian Mineralogist (2002) 40 (5): 1339–1345.
... and beryllophosphates of a great variety of cations) are extremely rare, known only from their type localities. To date, the overall number of localities seems also to be quite restricted ( cf. Černý 2002 ). beryllonite hydroxylherderite carbonate-fluorapatite beryl alteration BEP granitic pegmatite...
FIGURES
Image
Be–P linkages for (a) the <b>beryllophosphate</b> 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
Comparison between the double crankshaft chains in (a) <b>beryllophosphates</b> an...
Published: 01 April 2014
Fig. 7 Comparison between the double crankshaft chains in (a) beryllophosphates and (b) borosilicates.
Journal Article
Published: 01 April 2014
The Canadian Mineralogist (2014) 52 (2): 337–350.
...Fig. 7 Comparison between the double crankshaft chains in (a) beryllophosphates and (b) borosilicates. ...
FIGURES | View All (7)
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.
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...
FIGURES | View All (6)
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. ...
FIGURES | View All (6)
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: 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...
FIGURES | View All (7)
Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 50 (1): 405–444.
... are beryllophosphates of a great variety of cations; moraesite is the only phase corresponding to a phosphate of beryllium (see discussion below in the introduction to silicates). Roscherite-group minerals, roscherite and zanazziite , are reported to have a general composition of Ca 2 (Mn,Mg,Fe,Al) 5 [Be 3...
FIGURES | View All (5)
Journal Article
Published: 08 April 2021
The Canadian Mineralogist (2020) 58 (6): 863–866.
... Hashemzadeh, T. with Gandomani, E.M., 71 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...
Journal Article
Published: 01 June 2014
European Journal of Mineralogy (2014) 26 (3): 371–380.
... minor bending of pau and opr cages. The L/S ratios for ste-ste and pau-opr channels are both 1.32. A similar, but even more pronounced distortion is observed in the beryllophosphate, (NH 4 ) 16 [Be 16 P 16 O 64 ]·2H 2 O, which has an ordered Be-P MER -type framework and Ccca symmetry ( Bu et...
FIGURES | View All (5)