News from the hellandite group: the redefinition of mottanaite and ciprianiite and the new mineral description of ferri-mottanaite-(Ce), the first Fe 3+ -dominant hellandite

X-site control on rare earth elements in eclogitic garnets – an XRD study

The high-temperature behaviour of riebeckite: expansivity, deprotonation, selective Fe oxidation and a novel cation disordering scheme for amphiboles

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

Davidsmithite, (Ca,□) 2 Na 6 Al 8 Si 8 O 32 : a new, Ca-bearing nepheline-group mineral from the Western Gneiss Region, Norway

The arrojadite enigma III. The incorporation of volatiles: a polarised FTIR spectroscopy study

Preface

Potassic-aluminotaramite from Sierra de los Filabres, Spain

The P 2 1 / m - C 2/ m phase transition in synthetic amphiboles in the system Li 2 O–Na 2 O–MgO–SiO 2 –H 2 O: a high- T FTIR study

An electron microprobe, LAM-ICP-MS and single-crystal X-ray structure refinement study of the effects of pressure, melt-H 2 O concentration and f O 2 on experimentally produced basaltic amphiboles

Lithium in amphiboles : detection, quantification, and incorporation mechanisms in the compositional space bridging sodic and B Li-amphiboles

Synthesis and characterisation of ferri-clinoferroholmquistite, □Li 2 (Fe 2+ 3 Fe 3+ 2 )Si 8 O 22 (OH) 2

Trace-element partitioning between synthetic potassic-richterites and silicate melts, and contrasts with the partitioning behaviour of pargasites and kaersutites

Magnesiostaurolite and zincostaurolite: mineral description with a petrogenetic and crystal-chemical update * We dedicate this paper to the memory of our co-author Luciano Ungaretti, a good friend and outstanding mineralogist.

Luciano Ungaretti

Britholite-hellandite intergrowths and associated REE-minerals from the alkali-syenitic ejecta of the Vico volcanic complex (Latium, Italy); petrological implications bearing on REE mobility in volcanic systems

Detection, crystal-chemical mechanisms and petrological implications of (super [6]) Ti (super 4+) partitioning in pargasite and kaersutite

Effects of Fe (super 2+) and Fe (super 3+) contents on cation ordering in omphacite

The behaviour of Mn in amphiboles; Mn in synthetic fluor-edenite and synthetic fluor-pargasite

Crystal-chemical complexity in natural garnets; structural constraints on chemical variability