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

Fluorlamprophyllite, Na 3 (SrNa)Ti 3 (Si 2 O 7 ) 2 O 2 F 2 , a new mineral from Poços de Caldas alkaline massif, Morro do Serrote, Minas Gerais, 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

A new formula and crystal structure for nickelskutterudite, (Ni,Co,Fe)As 3 , and occupancy of the icosahedral cation site in the skutterudite group

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

Raygrantite, Pb 10 Zn(SO 4 ) 6 (SiO 4 ) 2 (OH) 2 , a New Mineral Isostructural with Iranite, from the Big Horn Mountains, Maricopa County, Arizona, Usa

Crystal structure of a new compound, CuZnCl(OH) 3 , isostructural with botallackite

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

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

Te-rich raspite, Pb(W 0.56 Te 0.44 )O 4 , from Tombstone, Arizona, U.S.A.: The first natural example of Te 6+ substitution for W 6+

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

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