Tag Archives: Eucryptite

Eucryptite – not an altcoin but millionfold used in the kitchen

β-Eucryptite

  • Named from the Greek for “well” and “concealed”, in reference to its occurrence as intimate intergrowths with the mineral albite
  • It is the main component of the fameous glass-ceramic cooktops for stoves, known in the EU under the trademark Ceran® from Schott AG
  • Formula: LiAlSiO4
  • Space group: P6222 (No. 180)
  • Crystal system: hexagonal
  • Crystal class: 622
  • Lattice parameters: a = b = 10.500 Å, c = 11.194 Å, αβ = 90°, γ = 120°

Crystal structure (click on the picture to download the VESTA file):

(K. Momma and F. Izumi, “VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data,” J. Appl. Crystallogr., 44, 1272-1276 (2011).)

  • SiO4 tetrahedra (orange)
  • AlOtetrahedra (light blue)
  • Li (purple/pink)
  • Oxygen (red)

For a 3D interactive version, see here:

https://skfb.ly/6wqY9

Advertisements

#181

#181

P6422

Example – beta-Eucryptite, LiAl(SiO4)

Synthesis and x-ray reflection pattern of beta-eucryptite

Tscherry, V.; Schulz, H.
Naturwissenschaften 57, (1970), 194-194
http://www.webmineral.com/data/Eucryptite.shtml

CIF
https://www.dropbox.com/s/9ro6vnhqp5o43rx/icsd_24888.cif

beta-Eucryptite

Li (green)
SiO4 tetrahedra (orange)
AlO6 octahedra (blue)

 

3D rotatable model of beta-Eucryptite