Mineral Identification IV

Lab groups:

Topic

1

2

3

4

5

A

Contreraz

Frohman

Greisler

Maneman

Springer

B

Hart Hayes

Ojala

Strauss

Cozart

Goelzenleuchter

C

Wilkie

Dearborn

Greene

Lancaster

Slater

Instructions for this exercise - Same as previous labs

Topic A, Mineral Identification - Layer Silicates II & Silica Minerals

 

¨           Muscovite

¨           Biotite

¨           Chlorite

¨           Lepidolite

¨           Quartz

¨           Opal

Topic B, Mineral Identification - Framework Silicates I - Feldspars

 

¨           Albite

¨           Anorthite

 

¨           Sanidine

¨           Microcline

¨           Orthoclase

Topic C, Mineral Identification - Framework Silicates II - Feldspathoids & Zeolites

 

¨           Nepheline

¨           Sodalite

¨           Leucite

¨           Analcime

¨           Stilbite

¨           Natrolite

Topic D, Mineral Questions (individual)

¨           What causes opalescence, generally?

¨           Both albite and anorthite are plagioclase minerals, but they occur in very different igneous rocks. In what types of rocks are each generally found?

¨           Lepidolite and pink tourmaline are typically found together. The reason for this is the same as the reason thay have similar colors. What is similar about their chemistry?

¨           Examine the composition of anorthoclase, and Figure 11.51, p. 481. Do you think this mineral cooled quickly or slowly?

¨           Microcline, orthoclase, and sanidine are polymorphs of KAlSi3O8. How do they differ in occurrence and conditions of formation?

¨           What is the main chemical difference between feldspathoids and feldspars (your book mentions this in Ch. 11)?

¨           What would happen if an quartz-bearing magma were to mix with a feldspathoid-bearing magma?

¨           If you have a quartz-bearing igneous rock, and there is a mineral in it that might be either, say, kspar or leucite, is there a really easy way to know which?

¨           Where are zeolites generally found?