Savelievaite, Mg 2 CrO 2 (BO 3 ), the first natural borate with species-defining Cr 3+ and the ludwigite–savelievaite isomorphous series

New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XX. Evseevite, Na 2 Mg(AsO 4 )F, the first natural arsenate with an antiperovskite structure

Bakakinite, Ca 2 V 2 O 7 , a new mineral from fumarolic exhalations of the Tolbachik volcano, Kamchatka, Russia

New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XVI. Yurgensonite, K 2 SnTiO 2 (AsO 4 ) 2 , the first natural tin arsenate, and the katiarsite–yurgensonite isomorphous series

Vasilseverginite, Cu 9 O 4 (AsO 4 ) 2 (SO 4 ) 2 , a new fumarolic mineral with a hybrid structure containing novel anion-centered tetrahedral structural units

New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XV. Calciojohillerite, NaCaMgMg 2 (AsO 4 ) 3 , a member of the alluaudite group

A highly hydrated variety of elpidite from the Khibiny alkaline complex, Kola Peninsula, Russia

Eleomelanite, (K 2 Pb)Cu 4 O 2 (SO 4 ) 4 , a new mineral species from the Tolbachik Volcano, Kamchatka, Russia

New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XIV. Badalovite, NaNaMg(MgFe 3+ )(AsO 4 ) 3 , a member of the alluaudite group

Kainotropite, Cu 4 Fe 3+ O 2 (V 2 O 7 )(VO 4 ), a new mineral with a complex vanadate anion from fumarolic exhalations of the Tolbachik volcano, Kamchatka, Russia

New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XIII. Pansnerite, K 3 Na 3 Fe 3+ 6 (AsO 4 ) 8

New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XII. Zubkovaite, Ca 3 Cu 3 (AsO 4 ) 4

Kamenevite, K 2 TiSi 3 O 9 ·H 2 O, a new mineral with microporous titanosilicate framework from the Khibiny alkaline complex, Kola peninsula, Russia

Antofagastaite, Na 2 Ca(SO 4 ) 2 ·1.5H 2 O, a new mineral related to syngenite

New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XI. Anatolyite, Na 6 (Ca,Na)(Mg,Fe 3+ ) 3 Al(AsO 4 ) 6

Alexkhomyakovite, K 6 (Ca 2 Na)(CO 3 ) 5 Cl∙6H 2 O, a new mineral from the Khibiny alkaline complex, Kola peninsula, Russia

Calamaite, a new natural titanium sulfate from the Alcaparrosa mine, Calama, Antofagasta region, Chile

Fumarolic arsenates − a special type of arsenic mineralization

Nickeltsumcorite, Pb(Ni,Fe 3+ ) 2 (AsO 4 ) 2 (H 2 O,OH) 2 , a new tsumcorite-group mineral from Lavrion, Greece

Crystal chemistry of Rb-, Sr-, Ba-, Ca- and Pb-exchanged forms of natural hilairite