Piccoliite, NaCaMn 3+ 2 (AsO 4 ) 2 O(OH), a new arsenate from the manganese deposits of Montaldo di Mondovì and Valletta, Piedmont, Italy

As-bearing new mineral species from Valletta mine, Maira Valley, Piedmont, Italy: IV. Lombardoite, Ba 2 Mn 3+ (AsO 4 ) 2 (OH) and aldomarinoite, Sr 2 Mn 3+ (AsO 4 ) 2 (OH), description and crystal structure

Armellinoite-(Ce), Ca 4 Ce 4+ (AsO 4 ) 4 ⋅H 2 O, a new mineral species isostructural with pottsite, (Pb 3 Bi)Bi(VO 4 ) 4 ⋅H 2 O

Mn-bearing purplish-red tourmaline from the Anjanabonoina pegmatite, Madagascar

Demagistrisite, the Missing Link in a Polysomatic Series from Lawsonite to Orientite

Chromium-rich vanadio-oxy-dravite from the Tzarevskoye uranium–vanadium deposit, Karelia, Russia: a second world-occurrence of Al–Cr–V–oxy-tourmaline

Monteneroite, Cu 2+ Mn 2+ 2 (AsO 4 ) 2 ⋅8H 2 O, a new vivianite-structure mineral with ordered cations from the Monte Nero mine, Liguria, Italy

Fluorcarmoite-(BaNa), the first Mg-dominant mineral of the arrojadite group

Magnesio-hornblende from Lüderitz, Namibia: mineral description and crystal chemistry

Lavinskyite-1 M , K(LiCu)Cu 6 (Si 4 O 11 ) 2 (OH) 4 , the monoclinic MDO equivalent of lavinskyite-2 O (formerly lavinskyite), from the Cerchiara manganese mine, Liguria, Italy

Beltrandoite, a new root-name in the högbomite supergroup: the Mg end-member magnesiobeltrandoite-2 N 3 S

Clino-suenoite, a newly approved magnesium-iron-manganese amphibole from Valmalenco, Sondrio, Italy

Redefinition of Zircophyllite, Ideally K 2 NaMn 7 Zr 2 (Si 4 O 12 ) 2 O 2 (OH) 4 F, a Kupletskite-group Mineral of the Astrophyllite Supergroup (in Accord with Ima 15-b) As an Astrophyllite-group Mineral, Ideally K 2 NaFe 2+ 7 Zr 2 (Si 4 O 12 ) 2 O 2 (OH) 4 F (ima 17-d)

Ferro-tschermakite from the Ploumanac'h granitic complex, Brittany, France: mineral description

Magnesio-riebeckite from the Varenche mine (Aosta Valley, Italy): crystal-chemical characterization of a grandfathered end-member

Crystal-chemical relations and classification problems in tourmalines belonging to the oxy-schorl–oxy-dravite–bosiite–povondraite series

Hydroxyferroroméite, a new secondary weathering mineral from Oms, France

Lucchesiite, CaFe 2+ 3 Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 O, a new mineral species of the tourmaline supergroup

The astrophyllite supergroup: nomenclature and classification

Lobanovite, K 2 Na( Mg 2 Na)Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 , a new mineral of the astrophyllite supergroup and its relation to magnesioastrophyllite