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°

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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)

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