Mayenite supergroup, part II: Chlorkyuygenite from Upper Chegem, Northern Caucasus, Kabardino-Balkaria, Russia, a new microporous mineral with “zeolitic” H 2 O

Eltyubyuite, Ca 12 Fe 3+ 10 Si 4 O 32 Cl 6 – the Fe 3+ analogue of wadalite: a new mineral from the Northern Caucasus, Kabardino-Balkaria, Russia

Dzhuluite, Ca 3 SbSnFe 3+ 3 O 12 , a new bitikleite-group garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia

Rusinovite, Ca 10 (Si 2 O 7 ) 3 Cl 2 : a new skarn mineral from the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia

Chegemite Ca 7 (SiO 4 ) 3 (OH) 2 – a new humite-group calcium mineral from the Northern Caucasus, Kabardino-Balkaria, Russia

A new natural phase in the system Mg 2 SiO 4 –Mg 2 BO 3 F–Mg 2 BO 3 (OH): composition, paragenesis and structure of OH-dominant pertsevite

Alumino-magnesiohulsite, a new member of the hulsite group, in kotoite marble from east of Verkhoyansk, Sakha-Yakutia, Russia