Cerite: a new supergroup of minerals and cerite-(La) renamed ferricerite-(La)

Sulfur-bearing monazite-(Ce) from the Eureka carbonatite, Namibia: oxidation state, substitution mechanism, and formation conditions

Kenoplumbomicrolite, (Pb,□) 2 Ta 2 O 6 [□,(OH),O], a new mineral from Ploskaya, Kola Peninsula, Russia

Parisite-(La), ideally CaLa 2 (CO 3 ) 3 F 2 , a new mineral from Novo Horizonte, Bahia, Brazil

Melcherite, trigonal Ba 2 Na 2 Mg[Nb 6 O 19 ]·6H 2 O, the second natural hexaniobate, from Cajati, São Paulo, Brazil: Description and crystal structure

Nomenclature of the gadolinite supergroup

Ralstonite Renamed Hydrokenoralstonite, Coulsellite Renamed Fluornatrocoulsellite, and Their Incorporation Into the Pyrochlore Supergroup

Parabariomicrolite discredited as identical to hydrokenomicrolite-3 R

Waimirite-(Y), orthorhombic YF 3 , a new mineral from the Pitinga mine, Presidente Figueiredo, Amazonas, Brazil and from Jabal Tawlah, Saudi Arabia: description and crystal structure

Almeidaite, Pb(Mn,Y)Zn 2 (Ti,Fe 3+ ) 18 O 36 (O,OH) 2 , a new crichtonite-group mineral, from Novo Horizonte, Bahia, Brazil

Pauloabibite, trigonal NaNbO 3 , isostructural with ilmenite, from the Jacupiranga carbonatite, Cajati, São Paulo, Brazil

Césarferreiraite, Fe 2+ Fe 2 3+ (AsO 4 ) 2 (OH) 2 ·8H 2 O, from Eduardo mine, Conselheiro Pena, Minas Gerais, Brazil: Second arsenate in the laueite mineral group

THE PYROCHLORE SUPERGROUP: REMARKS ON NOMENCLATURE — RESPONSE

“KALKOWSKYN” FROM OURO PRETO, MINAS GERAIS, BRAZIL: A MIXTURE OF PSEUDORUTILE, RUTILE, AND HEMATITE

Hydrokenomicrolite, (□,H 2 O) 2 Ta 2 (O,OH) 6 (H 2 O), a new microlite-group mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil

Witzkeite: A new rare nitrate-sulphate mineral from a guano deposit at Punta de Lobos, Chile

Mejillonesite, a new acid sodium, magnesium phosphate mineral, from Mejillones, Antofagasta, Chile

Rankamaite from the Urubu pegmatite, Itinga, Minas Gerais, Brazil: Crystal chemistry and Rietveld refinement

THE CRYSTAL STRUCTURE OF A MICROLITE-GROUP MINERAL WITH A FORMULA NEAR NaCaTa 2 O 6 F FROM THE MORRO REDONDO MINE, CORONEL MURTA, MINAS GERAIS, BRAZIL

THE PYROCHLORE SUPERGROUP OF MINERALS: NOMENCLATURE