Mercury(II) Dithiocyanate
compound
HgC2S2N2
The compound behind the dramatic 'Pharaoh's serpent' chemistry demonstration
When ignited, this compound erupts into a writhing ash snake — one of chemistry's most dramatic demonstrations.
Material
Gallery canvas set in a solid wood floating frame.
Frame
White
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Shown true-to-size - a 8×10in piece scaled against real furniture.
Crystallography
| Catalogue identity | Mercury(2+) dithiocyanate — C2/m |
| Formula | HgC2S2N2 |
| Crystal system | monoclinic |
| Space group | C 1 2/m 1 |
| Lattice (a, b, c) Å | 10.878, 4.042, 6.435 |
| Angles (α, β, γ) ° | 90, 95.28, 90 |
Structure data: Crystallography Open Database · Public domain (CC0)