Leightonite is a rare sulfate mineral with formula of K2Ca2Cu(SO4)4•2H2O.
Leightonite is a rare sulfate mineral with formula of K2Ca2Cu(SO4)4•2H2O.
==Crystal class== Leightonite forms flattened to elongated bladed crystals of variously interpreted crystal structure. Its crystal system is reported as triclinic morphologically, but also as pseudo-orthorhombic due to intricate lamellar twinning that mimics orthorhombic symmetry. Because it is triclinic, the crystal is represented by a system of three unequal vectors with corresponding unequal angles between them.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).