Thermodynamic properties of caesium–manganese phosphate CsMnPO4

Thermodynamic Data of Gadolinium–Strontium Phosphate

“…Based on the smoothed heat capacities, we calculated thermodynamic functions as detailed elsewhere. 22,25 Obviously, the C p•m 0 values at high temperatures approach those theoretically estimated through Dulong and Petit rule:…”

“…This anomaly on the low-temperature heat capacity curve is probably a downward branch of the magnetic disorder–order phase transition, which is outside the measurement range of the calorimeter. Such anomalies have not yet been studied calorimetrically for eulytite phosphates, but they are known for other classes of substances (for example, refs − ). A detailed study of the magnetic susceptibility of Sr 3 Gd­(PO 4 ) 3 at the same temperatures is necessary to clarify the nature of the low-temperature C p ( T ) anomaly.…”

“…Gibbs energies Φ m o in studied temperature range were calculated from corresponding enthalpy and entropy values. Based on the smoothed heat capacities, we calculated thermodynamic functions as detailed elsewhere. , …”

A commensurately modulated crystal structure and the physical properties of a novel polymorph of the caesium manganese phosphate CsMnPO4

“…Concerning physical properties it is worth comparing the features of magnetism in -CsMnPO 4 with those in other members of the AMnPO 4 morphotropic series. This information is only available for -CsMnPO 4 (Korchemkin et al, 2014) and RbMnPO 4 (Né nert et al, 2013). The low-temperature phase transition was found in -CsMnPO 4 at 6.9 K and interpreted as the order-disorder transition.…”

Low-Temperature Continuous Flow Synthesis of Metal Ammonium Phosphates

“…Metal ammonium phosphates (MAPs) and other compounds of the form AMPO 4 .xH 2 O (where A + is Na, K, NH 4 and M 2+ is a divalent metal such as Mg, Fe or Zn) were first explored in detail by Bassett and Bedwell in the 1930s 16 . These compounds have since been investigated for a myriad of uses including catalysis 17 – 19 , pigments 17 , fertilisers 20 , energy storage 21 , biomaterials 8 – 11 , flame retardants 17 and as ion exchange materials 22 – 28 . Their preparative route, however, has changed little since the initial research 16 : an inefficient batch precipitation process requiring vast excesses of phosphorus reagent, and extended reaction times (>3 h) at high temperatures (>80 °C) to fully crystallise the product.…”