amphiboles are the most common member of the amphibole group.
amphiboles are the most common member of the amphibole group.
the most common member of the amphibole group?
amphiboles
tschermakite is an end-member of the hornblende subgroup in the calcic-amphibole group. calcium-rich amphiboles have the general formula x y z o (oh) where x=ca, na, k, mn; y=mg, fe, fe, al, ti, mn, cr, li, zn; z=si, al (deer et al., 1963). the structure of tremolite (camg(sio)(oh,f)), another calcic amphibole, is commonly used as the standard for calcic amphiboles from which the formulae for their substitutions are derived. the wide range in variety of minerals classified in the amphibole group is due to its great ability for ionic replacement resulting in a widely varying chemical composition. amphiboles can be classified on the basis of the substitution of ions on the x site as well as the substitution of alal for si(mg, fe). in the calcium amphiboles like tschermakite ca(mg, fe)al (si al) o(oh), the predominant ion in the x position is occupied by ca as in tremolite, while the substitution mgsi-alal occurs on the y and the tetrahedral z site.
tschermakite
bullet::::- pyroxferroite - (fe,ca)sio









































bullet::::- pyroxenoid group









































bullet::::- wollastonite – casio









































bullet::::- rhodonite – mnsio









































bullet::::- pectolite – naca(sio)(oh)









































section::::inosilicates.:double chain inosilicates.









































bullet::::- amphibole group









































bullet::::- anthophyllite – (mg,fe)sio(oh)









































bullet::::- cummingtonite series









































bullet::::- cummingtonite – femgsio(oh)









































bullet::::- grunerite – fesio(oh)









































bullet::::- tremolite series









































bullet::::- tremolite – camgsio(oh)









































bullet::::- actinolite – ca(mg,fe)sio(oh)









































bullet::::- hornblende – (ca,na)(mg,fe,al)si(al,si)o(oh)









































bullet::::- sodium amphibole group









































bullet::::- glaucophane – namgalsio(oh)









































bullet::::- riebeckite (asbestos) – nafefesio(oh)









































bullet::::- arfvedsonite – na(fe,mg)fesio(oh)









































section::::phyllosilicates.
silicate minerals