Aenigmatite is a sodium, iron, titanium inosilicate mineral with formula: Na₂Fe²⁺₅TiSi₆O₂₀. It forms brown to black triclinic lamellar crystals. It has Mohs hardness of 5.5 to 6 and specific gravity of 3.74 to 3.85. General Name, Symbol, Number sodium, Na, 11 Chemical series alkali metals Group, Period, Block 1, 3, s Appearance silvery white Atomic mass 22. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... General Name, Symbol, Number titanium, Ti, 22 Chemical series transition metals Group, Period, Block 4, 4, d Appearance silvery metallic Atomic mass 47. ... The silicate minerals make up the the largest and most important class of rock-forming minerals. ... This article is about minerals in the geologic sense; for nutrient minerals see dietary mineral; for the band see Mineral (band). ... In crystallography, the triclinic crystal system is one of the 7 lattice point groups. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... Relative density (also known as specific gravity) is a measure of the density of a material. ...

Aenigmatite is primarily found in sodium-rich volcanics, pegmatites, and other low silica intrusive rocks. It was also reported from the Kaidun meteorite of South Yemen. It was first described in 1865 for an occurrence in the Ilimaussaq intrusive complex of west Greenland. Its name comes from the Greek word for "riddle". This article is about volcanoes in geology. ... Pegmatite is a very coarse-grained igneous rock that has a grain size of 20 mm or more; such rocks are referred to as pegmatitic. ... Pluton redirects here. ... National motto: ??? Official language Arabic Capital Aden Area 287,680 km² Population  - Total (1973)  - Density 1,590,275 5. ...

External links

• Mindat with location data
• Webmineral data