Log In
Melanocerite-(Ce)
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Melanocerite-(Ce)
Formula:
(Ce,Ca)5(SiO4,BO4)3(OH,O)
Often contains Th.
Colour:
Brown to black
Lustre:
Resinous, Greasy
Hardness:
5 - 6
Specific Gravity:
4.13 - 4.30
Crystal System:
Hexagonal
Name:
Named by P.T. Cleve from the Greek for black (μέλας) and cerium, after the appearance and content of cerium. A preliminary description was given by Brøgger (1887), and more detailed in Brøgger (1890).
Probably a Ca-REE borosilicate within the apatite supergroup.
"To be potentially discredited [= tritomite-(Ce)]" according to Pasero et al. (2010).
"To be potentially discredited [= tritomite-(Ce)]" according to Pasero et al. (2010).
Unique Identifiers
Mindat ID:
2629
Long-form identifier:
mindat:1:1:2629:7
IMA Classification of Melanocerite-(Ce)
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ce3+5(SiO4,BO4)3(OH,O)
First published:
1887
Classification of Melanocerite-(Ce)
9.AJ.20
9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
Kjeøya, Barkevik area, Larvik Commune, Vestfold, Norway