SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Berchiesi, G.; Lafitte, M.; J. Chim. Phys. 877-81 (1971).
Conditions:
Compiler:
Methodology:
The liquidus was determined with a visual method [2] supplemented with DSC measurements. Enthalpy changes were measured but not reported.
Sample Information:
- Not stated. Component (1) undergoes a phase transition at 418 K [1]. Component (2) undergoes a phase transition1 at 415 K [1].
Measurement Errors:
Ambient temperature: The compiler estimates the accuracy of the temperature measurements to be probably ±0.05 K.
Mass concentration (m/v) (1): No information is given.
Methodology Citations
1
Braghetti, M.; Berchiesi, G.; Franzosini, P.; Ric. Sci. 39, 576 (1969).
2
Braghetti, M.; Leonesi, D.; Franzosini, P.; Ric. Sci. 38, 116 (1968).
System Components:
- Potassium formate, $\ce{ KCHO2 }$; [590-29-4] NIST WebBook
- Potassium thiocyanate, $\ce{ KCNS }$; [333-20-0] NIST WebBook
Experimental Data
Note 1: There is a eutectic at 78.5°C and 100 x2 = 46 (compiler).
Note 2: Data relevant to the liquidus branch richer in component (2) were published earlier.1
| $T_{\rm{m}}$ ($\pu{K}$) | $T_{\rm{m}}$ (°C) | $100 x_{2}$ |
|---|---|---|
| 449.15 | 176.00 | 1E+2 |
| 442.25 | 169.10 | 95.10 |
| 435.13 | 161.98 | 90.43 |
| 427.65 | 154.50 | 85.79 |
| 419.65 | 146.50 | 81.03 |
| 411.43 | 138.28 | 76.41 |
| 403.43 | 130.28 | 71.76 |
| 397.05 | 123.90 | 68.20 |
| 391.00 | 117.85 | 64.85 |
| 381.37 | 108.22 | 59.85 |
| 370.90 | 97.75 | 54.00 |
| 361.30 | 88.15 | 50.03 |
| 354.18 | 81.03 | 46.91 |
| 353.00 | 79.85 | 44.45 |
| 357.40 | 84.25 | 42.18 |
| 360.70 | 87.55 | 40.52 |
| 362.85 | 89.70 | 39.28 |
| 367.03 | 93.88 | 37.25 |
| 369.35 | 96.20 | 35.88 |
| 378.63 | 105.48 | 32.19 |
| 387.55 | 114.40 | 28.41 |
| 397.35 | 124.20 | 24.37 |
| 407.05 | 133.90 | 19.91 |
| 417.07 | 143.92 | 15.12 |
| 426.10 | 152.95 | 10.16 |
| 434.80 | 161.65 | 4.97 |
| 441.85 | 168.70 | 0 |
(a) The T/K values were calculated the compiler.
