ESR of Fe(III) in ferrous ammonium sulphate hexahydrate, Fe(NH4)(SO4)2·6H2O: A case of strong tetragonal crystal field

1977 ◽  
Vol 25 (1) ◽  
pp. 101-110 ◽  
Author(s):  
S Subramanian ◽  
P Narayana Murty ◽  
C.R.K Murty
Keyword(s):  
Crystal Field ◽  
Ammonium Sulphate ◽  
Ferrous Ammonium Sulphate ◽  
Tetragonal Crystal ◽  
Ferrous Ammonium ◽  
Tetragonal Crystal Field

Paramagnetic Resonance of theFe3+Ion in CaWO4(Strong Tetragonal Crystal Field)

1965 ◽  
Vol 138 (3A) ◽  
pp. A918-A924 ◽  
Author(s):  
R. W. Kedzie ◽  
D. H. Lyons ◽  
M. Kestigian
Keyword(s):  
Crystal Field ◽  
Paramagnetic Resonance ◽  
Tetragonal Crystal ◽  
Tetragonal Crystal Field

Microanalytical determination of calcium, phosphate, and arsenate including kinetics of formation of molybdenum blue from reduction of molybdoarsenic acid by ferrous ammonium sulphate

1987 ◽  
Vol 65 (6) ◽  
pp. 1313-1315 ◽  
Author(s):  
U. S. Rat ◽  
T. S. B. Narasaraju
Keyword(s):  
Calcium Phosphate ◽  
Ammonium Sulphate ◽  
Ferrous Ammonium Sulphate ◽  
Molybdenum Blue ◽  
Spectrophotometric Methods ◽  
Rate Determining Step ◽  
Kinetics Of Formation ◽  
Ferrous Ammonium ◽  
Kinetics Of

A method for the microdetermination of calcium, phosphate, and arsenate in mixtures of the three has been developed. In an aliquot of the mixture calcium was determined complexometrically using EDTA. Phosphate and arsenate were determined in second and third aliquots, respectively, using spectrophotometric methods. The interference of arsenate in the determination of phosphate was avoided by masking arsenate with thiosulphate. The kinetics of formation of molybdenum blue from molybdoarsenic acid by reduction with ferrous ammonium sulphate was also studied. The rate-determining step was found to be the reduction of molybdoarsenic acid with iron(II); the reaction was first order in iron(II) and arsenate over the concentration ranges studied. Values found for the enthalpy, entropy, and free energy of activation were 22, 0.05, and 7.5 kcal, respectively.

Radiolysis of ferrous ammonium sulphate in alkali nitrate and alkali halide matrices

1973 ◽  
Vol 20 (3) ◽  
pp. 153-157 ◽  
Author(s):  
V. S. Khare ◽  
V. Ramshesh ◽  
K. S. Venkateswarlu
Keyword(s):  
Ammonium Sulphate ◽  
Alkali Halide ◽  
Ferrous Ammonium Sulphate ◽  
Ferrous Ammonium
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