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Mineralpedia Details for Rittmannite

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Rittmannite

Rittmannite

Named after Alfred Rittmann, a German petrologist, volcanologist and a professor at the University of Catania in Catania, Italy. This rare mineral can be found at its type locality of Mangualde, Portugal in phosphate nodules in pegmatite veins. Two other purported localities of Rittmannite are the USA and Germany. Rittmannite is found in association with kryzhanovskite, frondelite, hureaulite, and orthoclase.

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

Formula
Mn2+Mn2+Fe2+2Al2(PO4)4(OH)2ยท8H2
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
light yellow 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
3.5 
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Rittmannite from Bendada quarries, Sabugal, Guarda dist., Portugal

Rittmannite
            from Bendada quarries, Sabugal, Guarda dist., Portugal

Micro yellow crystals less than 0.2mm.

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