mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Mineralpedia Details for Aenigmatite

Reset

Aenigmatite

Aenigmatite

Named for the Greek word ainigma, meaning “a riddle” and also the root of the common word enigma, in reference to the mineral’s, at the time, unknown or uncertain chemical composition. Aenigmatite is an uncommon mineral that is often a primary constituent of sodium-bearing alkalic volcanic rocks, pegmatites, and other igneous rocks that are silica-poor. Localities for Aenigmatite include in Greenland, Russia, Norway, Italy, the United States, Australia, and New Zealand, among many others.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/aenigmatite.pdf

Formula
Na4(Fe2+10Ti2)O4[Si12O36
Crystal System
Triclinic 
Crystal Habit
Lamellar 
Cleavage
Perfect, None, None 
Luster
Subadamantine 
Color
brown, black 
Streak
reddish brown 
Class
Triclinic - Pinacoidal 
Hardness
5-6 
WebMineral
View Aenigmatite 
Mindat
View Aenigmatite 

Aenigmatite from Khibiny Massif, Kola Peninsula, Russia

Aenigmatite
            from Khibiny Massif, Kola Peninsula, Russia

A long, 3cm, slender, bladed black and striated crystal os Aenigmatite suspended in matrix with several others.

Click thumbnail images for larger view.

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2017 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map