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Named after Edoardo Sanero, Professor of Mineralogy at the University of Genoa in Genoa, Italy. Found in only two localities worldwide at the Fianel mine in Switzerland and at its type locality at the Gambatesa mine in Italy where in can be found in veins through manganese ores that are associated with prehnite-pumpellyite facies.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/saneroite.pdf
Named for Francisco J. San Roman, a Chilean naturalist who specialized in mineralogy and geology. It occurs only at its type locality in the Santa Rosa Mine in the Tarapaca Region of Chile where is appears as colorless, lath-like fine needles to greenish-yellow radiating, acicular aggregates or artichoke like aggregates. It is associated with malachite, calcite, anhydrite, chalconatronite, sodium-hydrogen carbonates and juangodoyite.
Ref. Schluter, et al. and Neues Jahrbuch für Mineralogie - Abhandlungen, Volume 183, Number 2, February 2007 , pp. 117-121(5)
Named for the type locality at the Santa Barbara mining district in Tuscany, Italy, where it is found in concretionary nodules in clay in a lignite-bearing basin. Other known localities include in the Iron ore deposits on the Kerch peninsula in Ukraine, in the clays overlain by Pleistocene basalts at Wannon Falls near Hamilton in Victoria, Australia, and others in Cameroon and Germany. Santabarbaraite appears as brown to light brown amorphous masses, or as vivianite crystal and aggregate pseudomorphs. Santabarbaraite is a product of the oxidation of vivianite through metavivianite.
Ref. Minerals and their Localities, Bernard, J.H. and Hyršl, J. (2004)
Found only in California in the United States, Santaclaraite is named for its type locality at the Santa Clara mine. At Santa Clara, the mineral occurs as “cross-fiber veins and irregular masses in manganese-oxide stained chert and quartz.” Santaclaraite is found in association with calcite, quartz, barite, harmotome, chalcopyrite, copper, howieite, knuthoite, rhodochrosite, and braunite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/santaclaraite.pdf