Joanneumite

Joanneumite, confirmed as a new mineral in 2012, is the first recognized isocyanurate mineral, with the formula Cu(C₃N₃O₃H₂)₂(NH₃)₂.^[4][5] It is also an ammine-containing mineral, a feature shared with ammineite, chanabayaite and shilovite.^[6][7][8] All the minerals are very rare and were found in a guano deposit in Pabellón de Pica, Chile.^[9]

Joanneumite
Joanneumite (violet crystals), surrounded by salammoniac (fine-grained, blue-green mineral)
General
Category	Organic mineral
Formula	Cu(C3N3O3H2)2(NH3)2
IMA symbol	Joa[1]
Crystal system	Triclinic
Crystal class	Pinacoidal (1) (same H-M symbol)
Space group	P1
Unit cell	a = 5.042, b = 6.997 c = 9.099 [Å]; α = 90.05° β = 98.11°, γ = 110.95°
Identification
Density	1.97-2.02 (measured)
References	[2][3]

See also

• Copper(II) cyanurate