Structure of NH4Al2(OH)(H2O)(PO4)2.H2O, the ammonium–aluminum analog of GaPO4.2H2O and leucophosphite

Ammoniotinsleyite, (NH4)Al2(PO4)2(OH)⋅2H2O, a new mineral species from the guano deposit at Pabellón de Pica, Iquique Province, Chile

“…This new mineral is the ammonium analogue of tinsleyite, KAl 2 (PO 4 ) 2 (OH)⋅2H 2 O, with prevailing NH 4 + over K + and the aluminium analogue of spheniscidite, (NH 4 )Fe 3+ 2 (PO 4 ) 2 (OH)⋅2H 2 O, with prevailing Al 3+ over Fe 3+ (Table 5). The synthetic analogue of ammoniotinsleyite is well-known (Parise, 1984; Pluth et al ., 1984; Aubert et al ., 2003; Parnham et al ., 2006; Vaughan et al ., 2012). A crystal chemical review on minerals of the leucophosphite group and related synthetic compounds was reported by Yakubovich et al .…”

“…Coordinates and thermal displacement parameters of atoms are given in Table 3 and selected interatomic (Table 5). The synthetic analogue of ammoniotinsleyite is well-known (Parise, 1984;Pluth et al, 1984;Aubert et al, 2003;Parnham et al, 2006;Vaughan et al, 2012). A crystal chemical review on minerals of the leucophosphite group and related synthetic compounds was reported by Yakubovich et al (2012).…”

Über die Struktur von synthetischem Tinsleyit K[Al2(PO4)2 (OH)(H2O)]·H2O/The Structure of Synthetic Tinsleyite K[Al2(PO4)2(OH)(H2O )]·H2O

“…Die Endglieder die ser Reihe mit den idealen Zusammensetzungen x = y = 0 (Leukophosphit), x = 1 und y = 0 (Spheniscidit [12]) sowie x = 0 und y = 1 (Tins leyit) kommen als Minerale vor und sind nun alle kristallographisch charakterisiert. Die Verbindung mit x -y -1 bildet sich bei der Einwirkung von Phosphatdünger auf Bodenminerale [13] und wur de ebenfalls kristallographisch untersucht [14,15]. Tatsächlich zeigt sich, daß all diese Verbindungen isomorph sind und sehr ähnliche Gitterkonstanten aufweisen [9].…”

Leucophosphite K[Fe2(PO4)2(OH)(H2O)]·H2O: Hydrogen Bonding and Structural Relationships

“…Atomic coordinates and displacement parameters for the redetermined leucophosphite structure are listed in Table 1. In fact, a simple misprint of a K parameter in the paper of Moore (11) was the reason for the unacceptable short bond distances (12).…”

“…The compound with x"y"1 is formed by the reaction of soil constituents with phosphate fertilizers (33); its structure has been described recently (12,34 ) are analogous but not isotypic with leucophosphite in the strict sense of this term, since they contain oxo-bridged rather than hydroxo-bridged clusters (38,39). In the latter two compounds the distances between the metal atoms in the central pair of octahedra in the tetranuclear unit (distance f in Fig.…”