Some classic and some photonic crystals
grown by pupils of the Georg-Kerschensteiner-Gymnasium, Müllheim, under the guidance of their teacher, Otto Schäfer
a) chrome alum octahedra embedded in alum cube (left) and alum octahedron,
b) seignette salt and potassium dihydrogen phosphate (front),
c) Mn-doped seignette salt (left), copper calcium acetate *6H2O and rocksalt*2glucose*H2O (right),
d) triglycine sulfate,
e) sodium chlorate (left) and sodium bromate,
f) nickel ammonium sulfate*6H2O (top) and lithium sodium chromate*6H2O,
g) + h) opals, diameters about 2 cm.
The coin has a diameter of 1.9 cm.
Crystals shown in fig.s a)-f) are permanently exhibited in the
entrance area of the Crystallography department of the
Albert-Ludwigs-Universität Freiburg, Germany.
This page is referred to in
S. Müller, O. Schäfer, E. Keller,
Acta Cryst. C64, m300-m304 (2008)
by an outdated address.
To Keller homepage
Comments and questions to
eukell77@gmail.com (E.Keller)
Last update: 30. June, 2020