Chemical Education Journal, Vol. 11, No. 1

Chemical Education Journal (CEJ), Vol. 11, No. 1/Registration No. 11-2 /Received November 5, 2008.
URL = http://chem.sci.utsunomiya-u.ac.jp/cejrnlE.html

Plant Opal

Sample: plant opal
(Joetsu, Niigata)
Size: 0.4 mm (Top) and 0.7 mm (Bottom)
Chemical Formula: SiO₂・nH₂O

----------------------------------------------------------
Takanobu Oba
Geoscience Department, Joetsu University of Education
E-Mail: ohba@juen.ac.jp
----------------------------------------------------------

Top

CEJ Vol. 11, No. 1, Contents