EPR of Mn2+ in hydrated double sulphates

The electron paramagnetic resonance of Mn2+ in single crystals of CoM2'(SO4)2.6H2O(M'=Rb, Cs, Tl), M"Tl2(SO4)2.6H2O(M"=Mg, Zn), ZnNa2(SO4)2.4H2O and CdNa2(SO4)2.2H2O has been studied in X-band at room temperature (300K). Two magnetically inequivalent, but otherwise identical, complexes of Mn2+ have been found in all the systems. The complexes are related to each other by two-fold symmetry about the b axis. The resonance line positions are fitted to the spin-Hamiltonian of orthorhombic symmetry. The hyperfine splittings of Mn2+, surrounded by an octahedron of water molecules and by an octahedron of oxygens, were used to calculate the covalency in crystals containing Mn2+ surrounded both by water and by oxygen molecules.

[1]  G. Upreti,et al.  Electron Paramagnetic Resonance Study of VO 2+ Doped in Single Crystals of CoK 2 (SO 4 ) 2 ·6H 2 O , 1978 .

[2]  V. Jain,et al.  Electron paramagnetic resonance of Mn2+ and Gd3+ in Pr2Zn3(NO3)12.24 H2O single crystals , 1978 .

[3]  V. Jain.  EPR of Mn2+ in Tutton Salts , 1977 .

[4]  V. Jain,et al.  EPR of VO2+ in ZnCs2(SO4)2 · 6 H2O Single Crystals , 1977 .

[5]  G. Upreti,et al.  EPR investigations of Mn2+ in MK2(SO4)2-6H2O Tutton salt single crystals , 1977 .

[6]  V. Jain,et al.  EPR of Mn2+ in Pr2Mg3(NO3)12 · 24H2O Single Crystals , 1977 .

[7]  C. Haranadh,et al.  EPR investigation of krohnkite, Na2Cu(SO4)2.2H2O , 1976 .

[8]  A. Leclerc,et al.  Electron spin resonance measurements of the spin Hamiltonian zero‐field splitting parameter D as a function of temperature for trigonally distorted Cr3+⋅6H2O magnetic complexes in families of hydrated crystals. I , 1975 .

[9]  S. Kasthurirengan,et al.  Electron paramagnetic resonance study of vanadyl ion in K2Zn(SO4)2·6H2O and K2Mg(SO4)2·6H2O , 1975 .

[10]  R. Ferguson,et al.  Refinement of the crystal structure of kröhnkite , 1975 .

[11]  S. Isotani,et al.  Phase transition in metal hexammine complexes. II. The EPR spectra of Ni(NO3)26NH3 and Ni++ doped Zn(NO3)26NH3 and Cd(NO3)26NH3 , 1975 .

[12]  G. Sastry,et al.  Electron spin resonance studies on Cu2+ doped Na2Zn(SO4)2.4H2O , 1971 .

[13]  S. D. Pandey,et al.  Electron paramagnetic resonance of Mn2 in the ferroelectric phase of NaNO2 , 1971 .

[14]  K. Müller,et al.  Covalency and hyperfine structure constant A of iron group impurities in crystals , 1969 .

[15]  A. Manoogian,et al.  Electron spin resonance of Mn2+ impurities in monticellite , 1969 .

[16]  G. Brown,et al.  The structure of copper ammonium sulfate hexahydrate from neutron diffraction data , 1969 .

[17]  W. Windsch,et al.  EPR Spectrum of Mn2+ in Guanidinium Aluminium Sulfate Hexahydrate , 1969 .

[18]  I. J. Fritz,et al.  Electron Spin Resonance of Zn(ClO4)2·6H2O:Mn2+in a Parallel and Perpendicular Configuration , 1968 .

[19]  J. Henning.  Covalency and hyperfine structure of (3d)5 — Ions in crystal fields , 1967 .

[20]  J. Gill.  Measurements of the van Vleck spin-lattice relaxation of copper in the potassium zinc sulphate lattice , 1965 .

[21]  C. Kikuchi,et al.  VO2+ and X‐Ray Produced V2+ in Tutton Salt , 1964 .

[22]  R. S. Title.  Electron Paramagnetic Resonance Spectra ofCr+,Mn++, andFe3+in Cubic ZnS , 1963 .

[23]  B. R. Rao.  Die Verfeinerung der Kristallstruktur von Kröhnkit, Na2Cu(SO4)2.2H2O , 1961 .

[24]  O. Matumura.  Electron Spin Resonance of Mn-activated Phosphors , 1959 .

[25]  M. Giglio.  Die Kristallstruktur von Na2Zn(SO4)2.4H2O (Zn‐Blödit) , 1958 .

[26]  W. Low.  PARAMAGNETIC RESONANCE SPECTRUM OF MANGANESE IN CUBIC MgO AND CaF$sub 2$ , 1957 .

[27]  J. Owen,et al.  Paramagnetic Resonance II , 1955 .

[28]  J. S. V. Wieringen.  Paramagnetic resonance of divalent manganese incorporated in various lattices , 1955 .

[29]  N. Bruce Hannay,et al.  The Dipole Moment of Hydrogen Fluoride and the Ionic Character of Bonds , 1946 .