heulandite Min.
(ˈhjuːləndaɪt)
[Named 1822 after H. Heuland, an English mineralogist: see -ite1.]
A mineral of the Zeolite group; a hydrated silicate of aluminium and calcium, found in crystals of various colours with pearly lustre.
| 1822 Edin. Phil. Jrnl. VI. 112 The Stilbite and the Heulandite. 1852 Brooke & Miller Phillips' Min. 439 Heulandite belongs to the anorthic system. 1868 Dana Min. (ed. 5) 445 Heulandite occurs principally in amygdaloidal rocks. |