mesolite
/ˈmɛsə(ʊ)lʌɪt/Mineralogy
noun
An orthorhombic hydrated aluminosilicate of calcium and sodium, occurring as colourless to white needle-like or fibrous crystals, structurally intermediate between natrolite and scolecite.
Origin
Early 19th century. From meso- + -lite, after German Mesolith.