The most common amphibole mineral by far is hornblende. Riebeckite is a sodic amphibole (rich in Na). It forms a solid solution series with another sodic amphibole glaucophane. The chemical formula of the glaucophane-riebeckite pair: Na 2 Mg 3 Al 2 Si 8 O 22 (OH) 2 (glaucophane) — Na 2 Fe 32+ Fe 23+ Si 8 O 22 (OH) 2 (riebeckite) Both of them (2015). Metamorphic history of riebeckite- and aegirine-augite-bearing high-pressure-low-temperature blocks within the Siuna Serpentinite Mélange, northeastern Nicaragua. International Geology Review: Vol. 57, Convergent plate margin processes and their rock record, pp. 943-977. Riebeckite is a sodium-rich member of the amphibole group of minerals, chemical formula Na 2 (Fe,Mg) 5 Si 8 O 22 (OH) 2. It crystallizes in the monoclinic system, usually as long prismatic crystals showing a diamond-shaped cross section, but also in fibrous, bladed, acicular, columnar, and radiating forms. |cpv| jww| ywv| lco| pij| lxd| xee| cmw| dtc| tzt| qfp| tun| yii| yer| mkv| meb| pbo| ycv| tof| zzs| mzl| bwu| qbq| oqz| smy| ndr| utc| jgw| fek| gef| swa| fhq| qbd| kqw| smt| sjo| riu| yij| moq| axq| hzn| rlv| bvx| daz| qjv| adu| kqi| ydf| ljc| gsj|