Search Mineralpedia – A Mineral Photo Database and Identification Guide
Theodor Richter, a German mineralogist, professor, and co-doscoverer of indium, is the namesake of the mineral Richterite. Richterite is found in metamorphosed limestones, igneous rocks, carbonatites and also in meteorites. Many localites, historic localities and localities for good specimens include Sweden, Greenland, Russia, the USA, Canada, Brazil, Japan, and Madagascar.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/richterite.pdf
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