Beiträge zur systematischen Verwandtschaftslehre. 100

Modeling of Thermodynamic Properties and Phase Equilibria of the Si-P System

“…temperature of SiP phase (not even the pressure is provided) giving a Ref 44. In the original paper, [44] the main focus was on germanium phosphide, GeP, while the thermal decomposition temperature of SiP phase was only mentioned at one atmosphere to be 1140°C and another Ref 25 was given, which is also cited by Korb et al [24] but the original source is not available. In the book, [43] which is mainly a compacted version from, [22] no information at all is provided on the ''melting point'' of SiP.…”

The Thermodynamic Properties of Phosphorus and Solid Binary Phosphides

“…121 This device was used frequently by Biltz and co-workers during the 1930s and 1940s to measure the partial pressure generated by decomposing phosphides (particularly refractory metal), the results of which have stood up well over time. 3,174,[176][177][178]198,201,214,219,258,260 (b) Dynamic Methods. By far the vast majority of dynamic vapor pressure measurements of phosphides have been made using Knudsen effusion, but there are a few others.…”

“…(i) VP 2 ) VP + 1 / 4 P 4 (g) (tensimetric, 953 K) 178 (ii) 3V 4 P 3 ) V 12 P 7 + P 2 (g) (mass loss Knudsen effusion, 1450-1650 K) 179 (iii) V 12 P 7 ) 6V 2 P + 1 / 2 P 2 (g) (mass loss Knudsen effusion, 1563-1762 K) 179 (iv) 3V 2 P ) 2V 3 P + 1 / 2 P 2 (g) (mass loss Knudsen effusion/mass spectrometry, 1677-1846 K) 180 (v) V 3 P ) 3V(g) + 1 / 2 P 2 (g) (mass loss Knudsen effusion/mass spectrometry, 1830-1900 K) 181 Myers et al have used their results to calculate ∆H°2 98 (R-white reference) for V 4 P 3 , V 12 P 7 , V 2 P, and V 3 P. These values depend on estimated free-energy functions, which in turn depend on experimental heat capacity measurements for V 3 P made using DSC by White et al 74 The heat capacity measurements cover the temperature range 160-330 K, meaning that entropy values for V 3 P are calculated using a substantial temperature extrapolation. An additional difficulty with these calculations is their dependence on the experimental results for the decomposition of V 3 P as an "anchor", since the uncertainty level attached to these latter results is considerable.…”

“…The last of the static vapor pressure measuring devices is that described by Kubaschewski et al as a “tensi-eudiometer” . This device was used frequently by Biltz and co-workers during the 1930s and 1940s to measure the partial pressure generated by decomposing phosphides (particularly refractory metal), the results of which have stood up well over time. ,,− ,,,,,, …”

High-pressure phases with ordered defect PbFCl-type structures in the systems V–P and Nb–P

“…2311. (Chine, 1941;Zumbusch, Biltz, Reinecke & Wiechmann, 1942;Sch/ifer & Fuhr, 1965). These reports agree on the existence of the phases VP, NbP, VP2, and NbP2.…”