SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Pochtakova, E. I.; Zh. Obshch. Khim. 44, 241-8 (1974).
Conditions:
Compiler:
Methodology:
A visual polythermal method was used. This was supplemented with differential thermal analysis but no numerical DTA data are tabulated.
Sample Information:
- The materials were prepared by reacting C.P. carbonates with a slight excess of formic acid [1].
Component (1) undergoes phase transitions at 60, 135 and 157°C [2].
Component (2) undergoes a phase transition at 140°C.
Measurement Errors:
Ambient temperature: The compiler estimates the accuracy of the temperature measurements to be probably ±2 K.
Mass concentration (m/v) (1): No information is given.
Methodology Citations
1
Sokolov, N. M.; Zh. Obshch. Khim. 24, 1581-93 (1954).
2
Sokolov, N. M.; Tezisy Dokl. X Nauch. Konf. S. M. I. (1956).
System Components:
- Potassium formate, $\ce{ KCHO2 }$; [590-29-4] NIST WebBook
- Magnesium formate, $\ce{ Mg(CHO2)2 }$; [557-39-1] NIST WebBook
Experimental Data
Note: The system was investigated at 0 ≤ 100 x2 ≤ 25 due to thermal instability of component 2. No characteristic point was observed in the composition range mentioned.
| $T_{\rm{m}}$ ($\pu{K}$) | $T_{\rm{m}}$ (°C) | $100 x_{2}$ |
|---|---|---|
| 440 | 167 | 0 |
| 463 | 190 | 5 |
| 485 | 212 | 7.5 |
| 498 | 225 | 1E+1 |
| 512 | 239 | 12.5 |
| 516 | 243 | 15 |
| 530 | 257 | 17.5 |
| 542 | 269 | 2E+1 |
| 553 | 280 | 22.5 |
| 560 | 287 | 25 |
(a) The T/K values were calculated the compiler.
