Optical-absorption spectra of the layered transition-metal thiophosphatesMPS3(M=Mn, Fe, and Ni)

1992 ◽  
Vol 46 (9) ◽  
pp. 5134-5141 ◽  
Author(s):  
P. A. Joy ◽  
S. Vasudevan
Keyword(s):  
Transition Metal ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Optical Absorption Spectra ◽  
Layered Transition Metal

The optical absorption spectra of certain transition metal ions in muscovite, lepidolite, and fuchsite

1968 ◽  
Vol 5 (1) ◽  
pp. 31-38 ◽  
Author(s):  
G. H. Faye
Keyword(s):  
Transition Metal ◽  
Optical Absorption ◽  
Metal Ions ◽  
Absorption Spectra ◽  
Transition Metal Ions ◽  
Ligand Field ◽  
Optical Absorption Spectra ◽  
Ligand Field Theory ◽  
Octahedral Sites ◽  
Sheet Silicate

The unpolarized optical absorption spectra of the sheet silicate minerals muscovite, lepidolite, and fuchsite have been examined. The spectra, interpreted on the basis of ligand field theory, indicate that all three minerals contain Fe3+ and possibly Ti3+ in octahedral sites. In addition, muscovite is shown to contain octahedrally coordinated Fe2+, lepidolite octahedral Fe2+ and Mn2+, and fuchsite octahedral Cr3+. No evidence was found for transition metals in tetrahedral sites.Some comments are made on the similarity of the spectra of certain of the transition metal ions in several classes of minerals. This leads to the speculation that the cations Fe3+, Mn2+, and Cr3+ may tend to 'mold' their immediate surroundings.

Analysis of optical absorption spectra of transition metal cluster ions by the spin-polarized DV- Xα method

1997 ◽  
Vol 40 (1-4) ◽  
pp. 13-16 ◽  
Author(s):  
Shinichirou Minemoto ◽  
Kazutaka Takahashi ◽  
Jun Matsumoto ◽  
Masako Iseda ◽  
Akira Terasaki ◽  
...  
Keyword(s):  
Transition Metal ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Metal Cluster ◽  
Cluster Ions ◽  
Optical Absorption Spectra ◽  
Transition Metal Cluster ◽  
Spin Polarized
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