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montgomeryite

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Journal Article
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 647-652.
... analogue of montgomeryite. The name honours Luca Fanfani who structurally characterised many phosphate minerals including montgomeryite. The Foote mine and Hagendorf-Süd occurrences of fanfaniite are co-type localities. One holotype specimen and one cotype specimen from the Foote mine are housed...
FIGURES
Journal Article
Published: 01 October 1988
American Mineralogist (1988) 73 (9-10): 1179-1181.
...Pete J. Dunn; Joel D. Grice; William C. Metropolis Abstract Zodacite is a new Mn-dominant member of the montgomeryite group. Microprobe analysis yielded MgO 0.2, MnO 4.8, CaO 18.0, A1 2 O 3 7.7, Fe 2 O 3 14.1, P 2 O 5 34.8, H 2 O (by difference) 20.4, total = 100.0 wt%. The idealized formula is Ca...
Journal Article
Published: 01 August 1979
The Canadian Mineralogist (1979) 17 (3): 579-582.
Journal Article
Published: 01 February 1976
American Mineralogist (1976) 61 (1-2): 5-11.
... dark blue, Y light brown, Z dark brown (Hesnard). Olmsteadite contains the same kind of structural unit as found in montgomeryite and vauxite. It consists of corner-linked octahedral chains of composition [ Fe 2 2+ ( Nb,Ta ) 2 5+ O 4 ( H 2 O ) 4 ( PO 4 ) 4 ] 6− which are oriented parallel to [010...
Journal Article
Published: 01 February 1976
American Mineralogist (1976) 61 (1-2): 12-14.
...L. Fanfani; A. Nunzi; P. F. Zanazzi; A. R. Zanzari Abstract An independent structural study on montgomeryite confirms the general features previously reported by Moore and Araki (1974). However the presence of several weak h 0 I reflections with l odd shows that the symmetry of the mineral...
Journal Article
Published: 01 August 1974
American Mineralogist (1974) 59 (7-8): 843-850.
...Paul Brian Moore; Takaharu Araki Abstract Montgomeryite, Ca 4 Mg(H 2 O) 12 [A1 4 (OH) 4 PO 4 O 6 ], Z = 2, a 10.023(1), b 24.121(3), c 6.243(1)Å, β 91.55(1)°, space group C 2/ c , possesses chains of corner-linked Al-O octahedra which are topologically and geometrically equivalent to the chains...
Journal Article
Published: 01 May 1940
American Mineralogist (1940) 25 (5): 315-326.
... contains 2[Ca 3 Al 8 (PO 4 ) 8 (OH) 6 ·15H 2 O]. The mineral is named after Mr. Edwin Over of Colorado Springs, Colorado. Montgomeryite , Ca 4 Al 5 (PO 4 ) 6 (OH) 5 ·11H 2 O, is a new mineral from cavities in the variscite nodules of Fairfield, Utah. It is monoclinic and occurs as green to colorless lath...
Journal Article
Published: 01 November 2016
The Canadian Mineralogist (2016) 54 (6): 1513-1523.
.... It is associated with crandallite, fluorwavellite, montgomeryite, and variscite/metavariscite. The mineral occurs as colorless tapering blades, elongated parallel to [100], flattened on {001} and exhibiting the forms {100}, {010}, {001}, , and . The streak is white, the luster is vitreous, and crystals...
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Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 1007-1014.
... -centred monoclinic cells and general formula Ca 4 A 2+ B 3+ 4 (PO 4 ) 6 (OH) 4 ·12H 2 O, where A and B = Mg and Fe for calcioferrite, Mg and Al for montgomeryite, Mn and Fe for zodacite and Mn and Al for fanfaniite, together with the triclinic mineral kingsmountite, Ca 3 Mn 2+ Fe 2+ Al 4 (PO 4 ) 6 (OH) 4...
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Image
Radial fans of whiteite-(CaMgMg) blades with <b>montgomeryite</b> (lower left). Th...
Published: 01 November 2016
Fig. 1. Radial fans of whiteite-(CaMgMg) blades with montgomeryite (lower left). The FOV is 1.7 mm across.
Image
The crystal structures of <b>montgomeryite</b>, mitryaevaite and sidorenkoite: (a)...
Published: 01 January 2002
Figure 29. The crystal structures of montgomeryite, mitryaevaite and sidorenkoite: (a) montgomeryite projected onto (010); (b) montgomeryite projected onto (001); (c) mitryaevaite projected onto (001), showing the [Al 5 (Pϕ 4 ) 4 ϕ 12 ] sheet that is made up of [ M 5 ( T O 4 ) 4 ϕ 17
Journal Article
Published: 01 April 2011
Mineralogical Magazine (2011) 75 (2): 269-278.
... structure is more closely related to those of vauxite and montgomeryite in containing zig-zag strings of corner-connected Al-centred octahedra along [011], where the shared corners are alternately in cis and trans configuration. These chains link through corner-sharing with PO 4 tetrahedra along [001...
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Journal Article
Published: 01 October 2008
Mineralogical Magazine (2008) 72 (5): 1011-1020.
...{document} \({\bar{1}}\) \end{document} 0; 5.73, (23), 101, 230 and 111; 8.01, (21), 130. Angastonite is likely to be related to the montgomeryite-group members and have a similar crystal structure, based on slabs of phosphate tetrahedra and Al octahedra. The simplified formula: CaMgAl 2 (PO 4 ) 2 (OH) 4...
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Journal Article
Published: 01 December 1999
Mineralogical Magazine (1999) 63 (6): 801-812.
... as crandallite in the few remaining bones, and as montgomeryite with traces of crandallite in the surrounding sediments. Bones within the pocket have very high levels of Al, Fe, F and Zn and often have "diffusive" type U-shaped concentration profiles. These profiles show that post-mortem uptake of trace elements...
Journal Article
Published: 01 August 1992
American Mineralogist (1992) 77 (7-8): 843-847.
... in beryl along with roscherite, montgomeryite, robertsite, mitridatite, whitlockite, and englishite. It occurs as colorless to white spear-shaped blades up to 0.4 × 0.1 × 0.04 mm, as sheaf- and bow tie–like aggregates, and as compact radial sprays to 2 mm in diameter. Individual crystals are flattened...
Journal Article
Published: 01 June 1976
Canadian Journal of Earth Sciences (1976) 13 (6): 717-736.
... in the formation of crandallite and wavellite (low phosphate concentration) or montgomeryite (high phosphate concentration). Phosphatization of argillaceous sediments will invariably lead to the formation of millisite and taranakite, and may involve palmerite as an intermediate phase. Variscite is unstable...
Journal Article
Published: 01 April 1942
American Mineralogist (1942) 27 (4): 281-300.
...; these are, in their probable sequence, gordonite, englishite, montgomeryite, overite, and sterrettite. The third stage represents the deposition of a small amount of pseudowavellite, and the fourth, the deposition of the members of the apatite group. Each of these stages has characteristic chemical qualities. The variscite...
Image
Selected sheets from phosphate structures; ( a ) brianite; ( b ) minyulite;...
Published: 01 August 2014
F ig . 26. Selected sheets from phosphate structures; ( a ) brianite; ( b ) minyulite; ( c ) laueite; ( d ) metavauxite; ( e ) montgomeryite; ( f ) mitryaevite; ( g ) bermanite; ( h ) mitridatite. Legend as in Fig. 24 .
Image
Finite clusters (a), infinite chains (b), and layers (c,d,e,f) built by cor...
Published: 01 February 2001
(and gorceixite) (e), and montgomeryite (f).
Journal Article
Published: 01 November 2000
American Mineralogist (2000) 85 (11-12): 1848-1850.
..., Fairfield, Utah, a classic variscite occurrence and the type locality for two new phosphate species, montgomeryite and overite ( Larsen 1940 ). During the second World War, Art operated the Harding pegmatite mine as a source of much needed tantalum, lithium, and beryllium for the war effort. Mentored...