A special issue devoted to Christian Chopin, in recognition of 30 years of dedicated service to the European Journal of Mineralogy

New minerals with modular structure derived from hatrurite from the pyrometamorphic rocks. Part IV: Dargaite, BaCa 12 (SiO 4 ) 4 (SO 4 ) 2 O 3 , from Nahal Darga, Palestinian Autonomy

Crystal structure and crystal-chemistry of vanadio-pargasite: a new amphibole from southern Lake Baikal, Siberia, Russia

Crystal chemistry of julgoldite, a mineral series of the pumpellyite group: re-investigation of Fe distribution and hydrogen-bonding

New data on cafarsite: reinvestigation of its crystal structure and chemical composition

First natural hexaferrite with mixed β ‴- ferrite (β-alumina) and magnetoplumbite structure from Jabel Harmun, Palestinian Autonomy

Reinvestigation of the zemannite structure and its dehydration behavior: a single-crystal X-ray and atomistic simulation study

Khesinite, Ca 4 Mg 2 Fe 3+ 10 O 4 [(Fe 3+ 10 Si 2 )O 36 ], a new rhönite-group (sapphirine supergroup) mineral from the Negev Desert, Israel – natural analogue of the SFCA phase

Crystal structure of potassic-mangani-leakeite from the Wessels Mine, Kalahari Manganese Field, South Africa

Ferromerrillite, Ca 9 NaFe 2+ (PO 4 ) 7 , a new mineral from the Martian meteorites, and some insights into merrillite–tuite transformation in shergottites

The crystal structure of flamite and its relation to Ca 2 SiO 4 polymorphs and nagelschmidtite

Perettiite-(Y), Y 3+ 2 Mn 2+ 4 Fe 2 +[Si 2 B 8 O 24 ], a new mineral from Momeik, Myanmar

FLUORCHEGEMITE, Ca 7 (SiO 4 ) 3 F 2 , A NEW MINERAL FROM THE EDGREWITE-BEARING ENDOSKARN ZONE OF AN ALTERED XENOLITH IN IGNIMBRITES FROM UPPER CHEGEM CALDERA, NORTHERN CAUCASUS, KABARDINO-BALKARIA, RUSSIA: OCCURRENCE, CRYSTAL STRUCTURE, AND NEW DATA ON THE MINERAL ASSEMBLAGES

Chiavennite revisited: a high-temperature in situ single-crystal X-ray diffraction study

‘Clinobarylite’–barylite: order-disorder relationships and nomenclature

Structural intergrowth of merlinoite/phillipsite and its temperature-dependent dehydration behaviour: a single-crystal X-ray study

Mayenite supergroup, part I: Recommended nomenclature

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

Mayenite supergroup, part III: Fluormayenite, Ca 12 Al 14 O 32 [□ 4 F 2 ], and fluorkyuygenite, Ca 12 Al 14 O 32 [(H 2 O) 4 F 2 ], two new minerals from pyrometamorphic rocks of the Hatrurim Complex, South Levant

Mayenite supergroup, part IV: Crystal structure and Raman investigation of Al-free eltyubyuite from the Shadil-Khokh volcano, Kel’ Plateau, Southern Ossetia, Russia