What is this yellow precipitation on a ceramic surface after a paper has burn on it?

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What is this yellow precipitation on a ceramic surface after a paper has burn on it?

When a paper is burning on a ceramic surface (like a plate) there is a yellow precipitation.
Can anybody, explain, please, what is it, what is the chemical reaction between it and the composition of this precipitation?

2007-06-05 07:00:58 · 1 answers · asked by Lex 1 in Science & Mathematics ➔ Chemistry

1 answers

Due to Frenkel defects generated on the surface.

2007-06-05 07:18:45 · answer #1 · answered by ag_iitkgp 7 · 0⤊ 0⤋