Crystal structure of the laser material NdP5O14

Albrand, K.-R.; Attig, Rainer; Fenner, Jürgen; Jeser, J. P.; Mootz, D.

doi:10.1016/0025-5408(74)90192-5

Cited by 91 publications

(11 citation statements)

References 10 publications

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“…6. Analysis by Jade 6.0 software reveals that it is neodymium phosphate (NdP 5 O 14 ) 20. The thermo–oxidative degradation residue of IFR without REOs cannot be attributed to any certain substance.…”

Section: Resultsmentioning

confidence: 99%

An investigation into synergistic effects of rare earth oxides on intumescent flame retardancy of polypropylene/poly (octylene‐co‐ethylene) blends

Ren

Wan

Zhang

et al. 2011

Polymers for Advanced Techs

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Synergistic effects of two kinds of rare earth oxides (REOs), neodymium oxide (Nd2O3) or lanthanum oxide (La2O3) on the intumescent flame retardancy of thermoplastic polyolefin (TPO) made by polypropylene/poly (octylene‐co‐ethylene) blends were investigated systemically by various methods. The limiting oxygen index (LOI) of flame retardant TPO (FRTPO) filled by 30 wt% intumescent flame retardants (IFR) composed of ammonium polyphosphate (APP) and pentaerythritol (PER) has been increased from 30 to 32.5 and 33.5 when 0.5 wt% of IFR was substituted by La2O3 and Nd2O3, respectively. Cone calorimetry tests also reveal the existence of synergistic effects. Thermalgravimetric analyses (TGA) demonstrate that the presence of REOs promotes the esterification and carbonization process in low‐temperature range while enhances the thermal stability of IFR and FRTPO in high‐temperature range. X‐ray diffraction (XRD) reveals that the interaction of Nd2O3 with IFR results in the formation of neodymium phosphate (NdP5O14) with high‐thermal stability. Thermal scanning rheological tests show that the presence of REOs increases complex viscosity of FRTPO in the temperature range of 190∼300°C so as to suppress melt dripping but decreases the complex viscosity and increases the loss factors tan δ in temperature range of 300∼400°C to make the carbonaceous strucuture more flexible and viscous to resist stress, expand better and keep intact. Copyright © 2009 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

An investigation into synergistic effects of rare earth oxides on intumescent flame retardancy of polypropylene/poly (octylene‐co‐ethylene) blends

Ren

Wan

Zhang

et al. 2011

Polymers for Advanced Techs

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“…The environment of the Nd 3+ site consists of eight O atoms with Nd-O distances in the range 2.385 (5) -2.529 (3) Å and a mean distance of 2.499 Å, close to that of 2.484 Å, observed for the 8-coordinate Nd 3+ in NdP 5 O 14 (Albrand et al, 1974). The M (M = 0.5 Mg + 0.5 Na) site is formally 8-coordinated.…”

Section: S1 Commentmentioning

confidence: 55%

Na₇Mg₁₃Nd(PO₄)₁₂

Jerbi¹,

Hidouri²,

Mongi³

2012

Acta Cryst E

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Investigations of the quasi-ternary system Na3PO4–Mg3(PO4)2–NdPO4 allowed us to obtain the new phosphate heptasodium tridecamagnesium neodymium dodecakisphosphate, Na7Mg13Nd(PO4)12, by applying a flux method. The crystal structure is isotypic with that of the previously reported Na7Mg13 Ln(PO4)12 (Ln = Eu, La) compounds. It consists of a complex three-dimensional framework built up from an NdO8 polyhedron (m symmetry), an MO6 octahedron statistically occupied by M = Mg and Na, and eight MgOx (x = 5, 6) polyhedra (four with site symmetry m), linked either directely by sharing corners, edges and faces, or by one of the eight unique PO4 tetrahedra through common corners. Two of the PO4 tetrahedra are statisticaly disordered over a mirror plane. The whole structure can be described as resutling from an assembly of two types of structural units, viz [Mg4 MP4O22]∞ 2 layers extending parallel to (100) and stacked along [100], and [Mg4NdP4O36]∞ 1 undulating chains running along the [010] direction. The six different Na+ cations (five with site symmetry m and one with 0.5 occupancy) are situated in six distinct cavities delimited by the framework. The structure was refined from data of a racemic twin.

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“…Other structure refinements have been reported for LaP 5 O 14 (Cole et al, 2000), PrP 5 O 14 (Liu et al, 1991), NdP 5 O 14 (Albrand et al, 1974;Cole et al, 2000), SmP 5 O 14 (Cole et al, 2000), EuP 5 O 14 (Parrot et al, 1975;Cole et al, 2000), GdP 5 O 14 (Lin et al, 1983;Cole et al, 2000), TbP 5 O 14 (Lin et al, 1982), ErP 5 O 14 (Jeżowska-Trzebiatowska et al, 1980;Katrusiak & Kaczmarek, 1995), TmP 5 O 14 (Kangjing et al, 1982) and YbP 5 O 14 (Hong & Pierce, 1974).…”

Section: Commentmentioning

confidence: 88%