In this chapter, we examine the new amphibole compositions which have been found and characterized since 1981, i.e. since the publication of volume 9A of the MSA Reviews in Mineralogy. We divide the chapter in two sections. The fi rst section describes new charge arrangements found in Nature, and the second section describes the extensive studies of synthetic amphiboles of novel composition done to clarify the crystal chemistry of exotic cations which are normally found as minor components. This chapter deals exclusively with monoclinic amphiboles, as the compositional space of orthorhombic amphiboles has not expanded since the former review. Although natural occurrences of protoamphibole (with space group Pnmn) have been described only in the last twenty years (Sueno et al. 1998; Konishi et al. 2003), their composition is within the compositional range previously defi ned for Pnma amphiboles.
Oberti, R., DELLA VENTURA, G., Camara, F. (2007). New Amphibole Compositions: Natural and Synthetic. In Amphiboles (pp. 89-123). CHANTILLY, VIRGINIA : Mineralogical Society of America [10.2138/rmg.2007.67.3].
New Amphibole Compositions: Natural and Synthetic
DELLA VENTURA, Giancarlo;
2007-01-01
Abstract
In this chapter, we examine the new amphibole compositions which have been found and characterized since 1981, i.e. since the publication of volume 9A of the MSA Reviews in Mineralogy. We divide the chapter in two sections. The fi rst section describes new charge arrangements found in Nature, and the second section describes the extensive studies of synthetic amphiboles of novel composition done to clarify the crystal chemistry of exotic cations which are normally found as minor components. This chapter deals exclusively with monoclinic amphiboles, as the compositional space of orthorhombic amphiboles has not expanded since the former review. Although natural occurrences of protoamphibole (with space group Pnmn) have been described only in the last twenty years (Sueno et al. 1998; Konishi et al. 2003), their composition is within the compositional range previously defi ned for Pnma amphiboles.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
