Double-terminated short-prismatic crystal of titanoan (2.17 % TiO2) magnesioferrikatophorite from a nephelin-syenite pegmatite. Composition of the mineral is (Na.48K.22).85(Na1.06Ca.94)2.00(Mg3.11Fe".77Mn.12)4.00(Fe"'.87Ti.13)1.00[(Si7.12Al.77Ti.11)8.00O22](OH)2. FOV is ~ 12x10 mm. Collected by Dmitrii Krinov in August of 2003. Pavel M. Kartashov collection (#2083), analytical data and photo.
This photo has been shown 331 times
Photo added: 16th Sep 2007