SDS Volume
Volume 66. Ammonium Phosphates, p None
Source Publication
Volkov, A. A.; Sosnina, O. E.; Uch. Zap. Perm. Univ. 1970, 229, 35.
Conditions:
Room Temp: Composition at 20 °C
Compilers:
Methodology:
The isothermal method of sections [1,2] was used with the aid of refractive index measurements,
Sample Information:
- Chemically pure $\ce{NH4Cl}$ and $\ce{(NH4)3PO4}$ were prepared according to directions given elsewhere [3].
Measurement Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
Methodology Citations
1
Mertslin, R. V.; Izv. Perm. Biol. Inst. 11, 1 (1937).
2
Zhuravlev, E. F.; Sheveleva, A. D. Zh. Neorg. Khim. 1960, 5, 2630.
3
Karyakin, Yu. V.; Chistye Khimicheskie Reaktivy, Moscow, p. 58 (1947).
System Components:
- Triammonium phosphate, $\ce{ (NH4)3PO4 }$; [10361-65-6] NIST WebBook
- Ammonium chloride, $\ce{ NH4Cl }$; [12125-02-9] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| w1 | 100w2 | 100w3 | m1 (mol/kg) a | m2 (mol/kg) a | Phase (s) () b | $n (\pu{20 ^{\circ}C},\rm{D})$ |
|---|---|---|---|---|---|---|
| 0 | 12.80 | 87.20 | 0 | 0.9979 | A | 1.3580 |
| 4.50 | 9.80 | 85.70 | 0.981 | 0.777 | A | 1.3620 |
| 9.11 | 8.90 | 81.99 | 2.08 | 0.738 | A | 1.3680 |
| 13.80 | 7.90 | 78.30 | 3.294 | 0.686 | A | 1.3750 |
| 18.50 | 7.55 | 73.95 | 4.676 | 0.694 | A | 1.3820 |
| 21.30 | 7.20 | 71.50 | 5.568 | 0.685 | A | 1.3860 |
| 24.10 | 7.20 | 68.70 | 6.557 | 0.712 | A | 1.3860 |
| 24.50 | 7.00 | 68.50 | 6.685 | 0.695 | A + B | 1.3920 |
| 24.50 | 5.50 | 70.0 | 6.542 | 0.534 | B | 1.3905 |
| 25.60 | 2.70 | 71.70 | 6.674 | 0.256 | B | 1.3860 |
| 27.10 | 0 | 72.90 | 6.948 | 0 | B | 1.3860 |
(a) These values were calculated by the compilers.
(b) The solid phases are: A = (NH4)3PO4·3H2O; B = NH4Cl.
