From Structure Topology to Chemical Composition. XXX. Refinement of the Crystal Structure and Chemical Formula of Shkatulkalite, Na 2 Nb 2 Na 3 Ti(Si 2 O 7 ) 2 O 2 (FO)(H 2 O) 4 (H 2 O) 3 , a Lamprophyllite-Group (Seidozerite Supergroup) TS-Block Mineral from the Lovozero Massif, Kola Peninsula, Russia

From Structure Topology to Chemical Composition. XXIX. Revision of the Crystal Structure of Perraultite, NaBaMn 4 Ti 2 (Si 2 O 7 ) 2 O 2 (OH) 2 F, a Seidozerite-Supergroup TS-Block Mineral from the Oktyabr'skii Massif, Ukraine, and Discreditation of Surkhobite

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

Badakhshanite-(Y), Y 2 Mn 4 Al(Si 2 B 7 BeO 24 ), a new mineral species of the perettiite group from a granite miarolic pegmatite in Eastern Pamir, the Gorno Badakhshan Autonomous Oblast, Tajikistan

From structure topology to chemical composition. XXVII. Revision of the crystal chemistry of the perraultite-type minerals of the seidozerite supergroup: Jinshajiangite, surkhobite, and bobshannonite

Fluorapophyllite-(Cs), CsCa 4 (Si 8 O 20 )F(H 2 O) 8 , a new apophyllite-group mineral from the Darai-Pioz Massif, Tien-Shan, northern Tajikistan

Crystal Structure of Near-Endmember Arrojadite-(BaNa) from Big Fish River, Yukon, Canada

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)

The Ericssonite Group of Fe 3+ Disilicate Minerals

From Structure Topology To Chemical Composition. Xxii. Titanium Silicates: Revision of the Crystal Structure of Jinshajiangite, NaBaFe 2+ 4 Ti 2 (Si 2 O 7 ) 2 O 2 (OH) 2 F, a Group-ii Ts-block Mineral

From Structure Topology To Chemical Composition. Xix. Titanium Silicates: Revision of the Crystal Structure and Chemical Formula of Bafertisite, Ba 2 Fe 2+ 4 Ti 2 (Si 2 O 7 ) 2 O 2 (OH) 2 F 2 , a Group-ii Ts-block Mineral

From Structure Topology To Chemical Composition. Xxi. Understanding the Crystal Chemistry of Barium in Ts-block Minerals

FROM STRUCTURE TOPOLOGY TO CHEMICAL COMPOSITION. XVIII. TITANIUM SILICATES: REVISION OF THE CRYSTAL STRUCTURE AND CHEMICAL FORMULA OF BETALOMONOSOVITE, A GROUP-IV TS-BLOCK MINERAL FROM THE LOVOZERO ALKALINE MASSIF, KOLA PENINSULA, RUSSIA

Ti-RICH FLUORO-RICHTERITE FROM KARIÅSEN (NORWAY): THE OXO-COMPONENT AND THE USE OF Ti 4+ AS A PROXY

SAAMITE, Ba□TiNbNa 3 Ti(Si 2 O 7 ) 2 O 2 (OH) 2 (H 2 O) 2 , A GROUP-III Ti-DISILICATE MINERAL FROM THE KHIBINY ALKALINE MASSIF, KOLA PENINSULA, RUSSIA: DESCRIPTION AND CRYSTAL STRUCTURE

FROM STRUCTURE TOPOLOGY TO CHEMICAL COMPOSITION. XVII. Fe 3+ VERSUS Ti 4+ : THE TOPOLOGY OF THE HOH LAYER IN ERICSSONITE-2 O , Ba 2 Fe 3+ 2 Mn 4 (Si 2 O 7 ) 2 O 2 (OH) 2 , FERROERICSSONITE, Ba 2 Fe 3+ 2 Fe 2+ 4 (Si 2 O 7 ) 2 O 2 (OH) 2 , AND YOSHIMURAITE, Ba 4 Ti 4+ 2 Mn 4 (Si 2 O 7 ) 2 (PO 4 ) 2 O 2 (OH) 2

FROM STRUCTURE TOPOLOGY TO CHEMICAL COMPOSITION. XVI. NEW DEVELOPMENTS IN THE CRYSTAL CHEMISTRY AND PREDICTION OF NEW STRUCTURE TOPOLOGIES FOR TITANIUM DISILICATE MINERALS WITH THE TS BLOCK

KOLSKYITE, (Ca□)Na 2 Ti 4 (Si 2 O 7 ) 2 O 4 (H 2 O) 7 , A GROUP-IV Ti-DISILICATE MINERAL FROM THE KHIBINY ALKALINE MASSIF, KOLA PENINSULA, RUSSIA: DESCRIPTION AND CRYSTAL STRUCTURE

Billwiseite, Ideally Sb 3+ 5 (Nb,Ta) 3 WO 18 , A New Oxide Mineral Species from the Stak Nala Pegmatite, Nanga Parbat – Haramosh Massif, Pakistan: Description and Crystal Structure

Synthetic fluoro-amphiboles; site preferences of Al, Ga, Sc and inductive effects on mean bond lengths of octahedra