GEO 2163 Study Guide - Final Guide: Biotite, Mica, Heulandite

56 views6 pages

Document Summary

[ca3(al3+,fe3+,cr3+,ti4+,v3+,zr3+)2si3o12: pyralspite garnets (orange, red, purple, pyrope: purple, almandine: red, spessartine: or. 2(sio4)3: how is chondrodite related to olivine, they have the same structure and there are olivine layers within. Chondrodite: what are the three polymorphs of al2sio5 and how can you visually distinguish between them, andalusite (stubby prisms), kyanite (columnar/parallel. It is used for rock age dating because it contains traces of u and th, which undergo radioactive decay. What do they have in common: zoisiteca2al3o(si2o7)(oh, clinozoisite ca2al3o(si2o7)(oh, epidote, allanite, piemontite, they are all bladed or prismatic orthorhombic monoclinic. Hornblende tends to form elongate rectangular crystals whereas augite crystals tend to be blocky. What are the dominant alkali elements in their formula: muscovite (k), paragonite (na), margarite (ca), annite (k, fe), Name two things: they are piezoelectric and hexagonal, sketch the ternary diagram for feldspars, label the three corners and show the limited and unlimited solid solution series.