Scapolite

UNB-2016-0442Minerals » Tectosilicates

Description

Sample of white/colourless short prisms of Scapolite with a vitreous lustre. Scapolite ((Na4(Al3Si9O24)Cl(Marialite)) and (Ca4(Al6Si6O24)CO3)(Meionite)) can be colourless, white, grey or greenish in colour but can rarely be found as bluish, pink, violet, brown or yellow in colour. Lustre is vitreous and streak is white. Hardness is 5 to 6 and cleavage is distinct in two directions. Scapolite can occur as crude short prisms that have a square cross section. Scapolite can also be compact, fibrous, granular that may have striations on the prism faces or on the cleavage surface.

Specifications

Object name	Scapolite
ID	UNB-2016-0442
Legal status	Permanent collection
Category	Mineral
Classification	Mineral group: Tectosilicates
Composition	CaB2Si2O8(OH,F)2 (Ca,Na2,K2)Al2Si4O12•6H2O (Ca,Na)AlSi2O8 (Na2,K2)Al2Si4O12•2H2O (Na,Ca)4(Al,Na)3Si9O24(Cl,CO3)2 (MAlO2)(SiO 2)x(H2O)y (Na,K)AlSiO4 Na2Al2Si3O10·2H2O KAlSi3O8 Na2Ca2Al6Si9O30·8H2O K(AlSi2O6) CaAl2Si4O12·4H2O Pectolite NaCa2Si3O8(OH)2H2O with trace amounts of copper (Ca,Na)(Al,Si)4O8 SiO2 with water inclusion (Na,Ca)4-8Al6Si6(O,S)24(Cl,SO4)1-2 Na8(Al6Si6O24)Cl2 CaAl2Si3O10·3H2O SiO2 (Cs,Na)2Al2Si4O12·2H2O (Na, Ca)(Al, Si)AlSi2O8 KAlSi3O8 (Na,K)AlSi3O8 (Na,K)AlSi3O8 CaAl2Si2O8 SiO2
Origin	Raymond, Maine, U.S.A.
Pieces	1
Partial	No
Measurements	7cm x 3cm x 2cm

Map of Origin

Publications

Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.