Hanswilkeite, KFeS 2 , a new peralkaline sulfide mineral

The crystal structure of charmarite – the first case of a 11 × 11 Å superstructure mesh in layered double hydroxides

Thermal behaviour of filatovite – a rare aluminoarsenate mineral of the feldspar group

Enricofrancoite, KNaCaSi 4 O 10 , a new Ca–K–Na silicate from Somma–Vesuvius volcano, southern Italy

Crocobelonite, Ca Fe 2 3 + (PO 4 ) 2 O, a new oxyphosphate mineral, the product of pyrolytic oxidation of natural phosphides

Re-investigation of ‘minasgeraisite-(Y)’ from the Jaguaraçu pegmatite, Brazil and high-temperature crystal chemistry of gadolinite-supergroup minerals

Natural cubic perovskite, Ca(Ti,Si,Cr)O 3–δ , a versatile potential host for rock-forming and less-common elements up to Earth’s mantle pressure

Goldhillite, Cu 5 Zn(AsO 4 ) 2 (OH) 6 ⋅H 2 O, a new mineral species, and redefinition of philipsburgite, Cu 5 Zn[(AsO 4 )(PO 4 )](OH) 6 ⋅H 2 O, as an As–P ordered species

The complex mechanism of Ti 4+ incorporation into litidionite from the Somma–Vesuvius volcano, Italy

Keplerite, Ca 9 (Ca 0.5 ☐ 0.5 )Mg(PO 4 ) 7 , a new meteoritic and terrestrial phosphate isomorphous with merrillite, Ca 9 NaMg(PO 4 ) 7

Crystal chemistry of ivanyukite-group minerals, A 3– x H 1+ x [Ti 4 O 4 (SiO 4 ) 3 ](H 2 O) n ( A = Na, K, Cu), ( n = 6–9, x = 0–2): crystal structures, ion-exchange, chemical evolution

Cyclophosphates, a new class of native phosphorus compounds, and some insights into prebiotic phosphorylation on early Earth

Akopovaite, Li 2 Al 4 (OH) 12 (CO 3 )(H 2 O) 3 , a new Li member of the hydrotalcite supergroup from Turkestan Range, Kyrgyzstan

Gasparite-(La), La(AsO 4 ), a new mineral from Mn ores of the Ushkatyn-III deposit, Central Kazakhstan, and metamorphic rocks of the Wanni glacier, Switzerland

Hydroxynatropyrochlore, (Na,Сa,Ce) 2 Nb 2 O 6 (OH), a new member of the pyrochlore group from the Kovdor phoscorite–carbonatite pipe, Kola Peninsula, Russia

Selivanovaite, NaTi 3 (Ti,Na,Fe,Mn) 4 [(Si 2 O 7 ) 2 O 4 (OH,H 2 O) 4 ]· n H 2 O, a new rock-forming mineral from the eudialyte-rich malignite of the Lovozero alkaline massif (Kola Peninsula, Russia)