Black coarse-grained prismatic masses of ferrorichterite with composition (Na.75K.39)1.14(Na1.19Ca.55Mn.26)2.00(Fe"2.42Fe"'1.33Mg1.23Mn.02)5[(Si7.39Al.23Ti.11)7.73O22](OH)2. Ferrorichterite segregations on the deposit usually don't contain any ore mineralization. Associated minerals are white albite and invisible by eye ingrowths of ferroferrikatophorite. FOV is ~ 12x10 mm. Selfcollected in March of 2002. Pavel M. Kartashov collection, analytical data and photo.
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