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Proto-ferro-suenoite
A valid IMA mineral species
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![◻{Mn2+2}{Fe2+5}(Si8O22)(OH)2](#"/photo-789226.html"><img src="/image.pl?url=https%3a%2f%2fwww.mindat.org%2fimagecache%2f97%2f45%2f03728140017271929011136.jpg&f=jpg&w=240" alt="03728140017271929011136.jpg" /></a><div><b>Shigeho Sueno</b></div></div></div><div><div><span>Formula:</span><div class=){kind=link}
Suenoite has Mn as the dominant in the B position. They are orthorhombic amphiboles in the magnesium-iron-manganese amphibole subgroup. The minerals in this root name group may have eitherPnma orPnmn (proto- prefixed name) space group symmetry. The suenoite is defined withA(Na+K+2Ca)<0.5 apfu andC(Al+Fe3++2Ti)<1 apfu.
Proto-ferro-suenoite is defined withPnmn symmetry and and Fe2+ as the dominant element in the C position.
Proto-ferro-suenoite is defined withPnmn symmetry and and Fe2+ as the dominant element in the C position.
Colour:
White to brownish-yellow.
Lustre:
Vitreous
Hardness:
5½ - 6
Crystal System:
Orthorhombic
Member of:
Name:
Originally named protomangano-ferro-anthophyllite. In a reorganization of the amphiboles, the use of mangano was abolished and a new root name was required. The International Mineralogical Association chose the new root name suenoite in honor of Shigeho Sueno (1937 – 11 March 2001, Tsukuba, Japan), Professor of Mineralogy at the University of Tsukuba and fellow of the Mineralogical Society of America.
Proto-ferro-suenoite is a very rare mineral known from only two localities (2016). It occurs as up to 15mm acicular crystals in wheat formed aggregates together with rhodonite, pyroxmangite, spessartine and rhodochrosite at the type locality and as an small (sub-mm to mm) fibres as an alteration product of Mn-rich fayalite at
Proto-ferro-suenoite can only be identified by a combination of EMPA, XRD and single crystal structure refinement, and the mineral should only be added to a new locality if properly identified.
Proto-ferro-suenoite can only be identified by a combination of EMPA, XRD and single crystal structure refinement, and the mineral should only be added to a new locality if properly identified.