If you were asked to make a thin section (containing quartz in random orientations) how would you decide that the thickness of the thin section is very close to the 0.03 mm? ### Birefringence ChartThis chart categorizes minerals based on their birefringence values, providing examples for each category.#### Categories:1. **Very Low Birefringence** - **Range:** 0.001-0.005 - **Examples and Values:** - Leucite: 0.001 - Apatite: 0.0042. **Low Birefringence** - **Range:** 0.005-0.010 - **Examples and Values:** - Microcline: 0.007 - Quartz: 0.009 - Plagioclase: 0.008-0.0103. **Moderate Birefringence** - **Range:** 0.010-0.020 - **Examples and Values:** - Wollastonite: 0.013-0.017 - Hypersthene: 0.014 - Staurolite: 0.009-0.0154. **Strong Birefringence** - **Range:** 0.020-0.035 - **Examples and Values:** - Hornblende: 0.020-0.025 - Tourmaline: 0.019-0.0355. **Extreme Birefringence** - **Range:** >0.035 - **Characteristics:** Shows higher-order white - **Examples and Values:** - Muscovite: 0.036-0.049 - Zircon: 0.042-0.065 - Calcite: 0.172 - Sphene: 0.100-0.192This chart helps in understanding how birefringence varies among different minerals and how it can be used to identify them.

Answered: you were asked to make a thin section…

you were asked to make a thin section (containing quartz in random orientations) how ould you decide that the thickness of the thin section is very close to the 0.03 mm?

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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Question

If you were asked to make a thin section (containing quartz in random orientations) how would you decide that the thickness of the thin section is very close to the 0.03 mm?

### Birefringence Chart

This chart categorizes minerals based on their birefringence values, providing examples for each category.

#### Categories:

1. **Very Low Birefringence**
- **Range:** 0.001-0.005
- **Examples and Values:**
- Leucite: 0.001
- Apatite: 0.004

2. **Low Birefringence**
- **Range:** 0.005-0.010
- **Examples and Values:**
- Microcline: 0.007
- Quartz: 0.009
- Plagioclase: 0.008-0.010

3. **Moderate Birefringence**
- **Range:** 0.010-0.020
- **Examples and Values:**
- Wollastonite: 0.013-0.017
- Hypersthene: 0.014
- Staurolite: 0.009-0.015

4. **Strong Birefringence**
- **Range:** 0.020-0.035
- **Examples and Values:**
- Hornblende: 0.020-0.025
- Tourmaline: 0.019-0.035

5. **Extreme Birefringence**
- **Range:** >0.035
- **Characteristics:** Shows higher-order white
- **Examples and Values:**
- Muscovite: 0.036-0.049
- Zircon: 0.042-0.065
- Calcite: 0.172
- Sphene: 0.100-0.192

This chart helps in understanding how birefringence varies among different minerals and how it can be used to identify them.

Expert Solution

Step 1: Introduction

To determine if the thickness of the thin section is very close to 0.03 mm, we can use the concept of birefringence. Birefringence is the difference in refractive indices of a mineral when viewed in different crystallographic directions.