MÖssbauer Study of Iron and Tin Exchanged into Victorian Brown Coal

1980 ◽  
Vol 3 ◽  
Author(s):  
J.D. Cashion ◽  
P.E. Clark ◽  
P.S. Cook ◽  
F.P. Larkins ◽  
M. Marshall
Keyword(s):  
Brown Coal ◽  
Mössbauer Effect ◽  
Local Environment ◽  
The Other ◽  
Line Broadening ◽  
Mossbauer Effect ◽  
Mössbauer Study

ABSTRACTMössbauer effect measurements have been taken of iron and tin introduced into brown coal to act as catalysts for hydrogenation. Spectra taken with 119Sn show that after introduction from solution, the tin appears as SnO2. During subsequent hydrogenation in an autoclave, some of the SnO2 is converted to β-tin and SnS. Ion-exchanged iron is shown from 57Fe measurements to occupy at least one site not populated in the native coal. Line broadening in this site and the other two original sites indicate the existence of variations in the local environment.

Mossbauer effect study of victorian brown coal

1981 ◽  
Author(s):  
J. D. Cashion ◽  
B. Maguire ◽  
L. T. Kiss
Keyword(s):  
Brown Coal ◽  
Mössbauer Effect ◽  
Effect Study ◽  
Mossbauer Effect

A Mössbauer study of the weathering of hornblende

Clay Minerals ◽  
1976 ◽  
Vol 11 (2) ◽  
pp. 153-163 ◽  
Author(s):  
B. A. Goodman ◽  
M. J. Wilson
Keyword(s):  
Soil Profile ◽  
Ferrous Iron ◽  
Mössbauer Effect ◽  
Ferric Iron ◽  
Natural Weathering ◽  
Hydroxyl Groups ◽  
Mossbauer Effect ◽  
Mössbauer Study

AbstractThe behaviour of iron in the natural weathering of hornblende in a sedentary soil profile has been investigated using the Mòssbauer effect. The spectra from samples at different stages of weathering show appreciable differences which can be accounted for if ferrous iron is lost preferentially from M(3) sites where it is coordinated to hydroxyl groups in a trans arrangement. Unlike biotite the proportion of ferric iron does not increase during weathering and this illustrates the difficulty with which the ferrous iron is oxidized in the amphibole structure.

Study of local environment in quasicrystallineAl86Mn14by Mössbauer effect

1986 ◽  
Vol 56 (2) ◽  
pp. 169-172 ◽  
Author(s):  
M. Eibschutz ◽  
H. S. Chen ◽  
J. J. Hauser
Keyword(s):  
Mössbauer Effect ◽  
Local Environment ◽  
Mossbauer Effect

Mossbauer Study of Changes in Magnetic Structure of La(Fe0.88Al0.12-xSix)13 Compounds

2012 ◽  
Vol 190 ◽  
pp. 530-533
Author(s):  
V.V. Serikov ◽  
N.M. Kleinerman ◽  
A.V. Vershinin
Keyword(s):  
Magnetic Structure ◽  
Mössbauer Effect ◽  
Ferromagnetic State ◽  
Antiferromagnetic State ◽  
Metamagnetic Transition ◽  
Mossbauer Effect ◽  
Mössbauer Study ◽  
First Order

A first-order metamagnetic transition from antiferromagnetic to ferromagnetic state in La (Fe0.88Al0.12-xSix) compounds was investigated using Mossbauer effect. The exchange-related clusters in the ferromagnetic and antiferromagnetic state are shown to exist. The influence of Si on magnetic structure is observed.

Transmission and line broadening in the Mössbauer effect. II

1963 ◽  
Vol 21 ◽  
pp. 217-231 ◽  
Author(s):  
S. Margulies ◽  
P. Debrunner ◽  
H. Frauenfelder
Keyword(s):  
Mössbauer Effect ◽  
Line Broadening ◽  
Mossbauer Effect

127I-NQR, 119 Sn Mössbauer Effect, and Electrical Conductivity of MSnI3 (M = K, NH4 , Rb, Cs, and CH3NH3 )

1990 ◽  
Vol 45 (3-4) ◽  
pp. 307-312 ◽  
Author(s):  
Koji Yamada ◽  
Takashi Matsui ◽  
Tomoko Tsuritani ◽  
Tsutomu Okuda ◽  
Sumio Ichiba
Keyword(s):  
Phase Transition ◽  
Electrical Conductivity ◽  
Structural Change ◽  
Mössbauer Effect ◽  
The Other ◽  
X Ray Diffraction ◽  
Mossbauer Effect ◽  
X Ray ◽  
Regular Octahedron ◽  
Other Hand

Abstract In a series of MSnI3 compounds (M = K, NH4 , Rb, Cs, CH3NH3) two types of coordination around the central Sn(II) were found by 127I-NQR and powder X-ray diffraction techniques. They are square pyramidal (for M = NH4 , Rb) and octahedral (for M = CH3NH3). CsSnI3 , on the other hand, showed a drastic structural change of the anion at 425 K from a square pyramid to a regular octahedron. Associated with this phase transition, the electrical conductivity increased from 4 x 10-3 S cm-1 to about 102 S cm-1 . This metallic modification was characterized by 127I-NQR and 119Sn Mössbauer spectroscopy.

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