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A study of Si‐L and O‐K ELNES in plant material: SiO 2 , Ca‐ and Zn‐silicate in Minuartia
Author(s) -
LICHTENBERGER O.,
NEUMANN D.
Publication year - 1996
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1046/j.1365-2818.1996.78443.x
Subject(s) - xanes , silicate , silicon , calcium silicate , materials science , crystallography , metal , electron microscope , analytical chemistry (journal) , chemistry , spectroscopy , metallurgy , physics , organic chemistry , chromatography , quantum mechanics , composite material , optics
The formation of vacuolar precipitates containing silicon and calcium, as well as the accumulation of metal‐silicates in cell walls of Minuartia has been investigated by electron microscopy, energy‐dispersive X‐ray analysis and electron spectroscopic imaging. The bond state of the elements concerned is examined by analysing energy‐loss near‐edge structures (ELNES), particularly the Si‐L 2,3 and the O‐K ELNES. Experimental ELNES results are compared with local densities of unoccupied states calculated by molecular orbital methods and results of XANES calculations.