Carbokentbrooksite

[4] Carbokenbrooksite characterizes in being carbonate-rich (the other eudialyte-group species with essential carbonate are zirsilite-(Ce), golyshevite, and mogovidite).

[3] Carbokentbrooksite and zirsilite-(Ce) are found as replacements of grains and crystals of eudialyte.

[2] They occur in pegmatites of Darai-Pioz alkaline massif, Tajikistan – a locality known for many rare minerals.

[5] The minerals are associated with aegirine, ekanite, microcline, polylithionite, quartz, stillwellite-(Ce) (silicates), pyrochlore-group mineral, fluorite, calcite, and galena.

[3] Beside the elements given in the formula, carbokentbrooksite contains admixtures of lanthanum, strontium, neodymium, iron, yttrium, titanium, potassium, chlorine, and praseodymium.