Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-19T10:32:46.363Z Has data issue: false hasContentIssue false
  • English
  • Français

A simple method for the measurement of the refractive indices of the felspars

Published online by Cambridge University Press:  14 March 2018

Olive Robins
Olive Robins*
Affiliation:
Geology Department, King's College, University of London.
Get access Rights & Permissions [Opens in a new window]

Extract

The method described is one that can be used to measure the refractive indices of minerals when no refractometer is available. The readings are consistent to ±0·002 and are in reasonable agreement with those obtained using a refractometer.

The principle of the method is to mix two liquids with different refractive indices. One of these is a typical immersion liquid with a very low volatility. It must have a refractive index greater than that of the mineral under investigation. The other, more volatile liquid has a refractive index less than that of the mineral. The two liquids selected must be miscible in all proportions, but must not react together. The mineral is completely immersed in a mixture of the two liquids.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 28 , Issue 202 , September 1948 , pp. 367 - 373
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1948

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)