Tag Archives: Bloedite

Bloedite

Blödite (also Bloedite)

  • named after the German mineralogist and chemist Karl August Blöde (1773 – 1820)
  • fun fact: the German adjective “blöd(e)” means “stupid”
  • Formula: Na2Mg(SO4)2  · 4 H2O
  • Space group: P21/a
  • Crystal system: monoclinic
  • Crystal class: 2/m
  • Lattice parameters: a = 11.126(2), b =  8.242(1) Å, c = 5.539(1) Å, α = 90°, β = 100.84(1)°, γ  90°

Crystal structure (click on the pictures 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).)

  • SO4 tetrahedra (yellow)
  • (distorted) NaO6 octahedra (purple)
  • MgO6 octahedra (green)
  • Oxygen (red)
  • Hydrogen (white)

For a 3D interactive version, see here:

https://skfb.ly/6ZEPS

Refs:

[1] F. C. Hawthorne, The Canadian Mineralogist 1985, 23, 669-674.
(PDF)