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Mineralpedia Details for Palenzonaite

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Palenzonaite

Palenzonaite

Named in honor of the discoverer and amateur mineralogist Professor Andrea Palenzona. Palenzonaite is a rare mineral found in thin veinlets through manganese deposits in radiolarian chert at the type locality in the Molinello mine in Italy. It can also be found in Switzerland and a newer locality in Japan. Palenzonaite is found in association with manganoan calcite, saneroite, ganophyllite, axinite, mediate, pyrobelonite, fianelite, parsettensite, rhodochrosite, knutohorite, aegerine, and quartz.

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

Formula
NaCa2Mn2+2(VO4)3 
Crystal System
Isometric 
Crystal Habit
Anhedral Grains 
Cleavage
None, None, None 
Luster
Adamantine 
Color
wine red 
Streak
brownish red 
Class
Isometric - Hexoctahedral 
Fracture
Sub Conchoidal 
Hardness
5-5.5 
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Palenzonaite from Molinello mine, Graveglia Valley, Liguria, Italy

Palenzonaite
            from Molinello mine, Graveglia Valley, Liguria, Italy

Palenzonaite named for Andrea Palenzona discoverer of the mineral Andrea is professor of mineralogy at the University of Genova. The specimen here contains crystal deep red grains to 1mm. 

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