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Related Experiment Video

Updated: Jun 28, 2026

$X-ray Powder Diffraction in Conservation Science: Towards Routine Crystal Structure Determination of Corrosion Products on Heritage Art Objects$

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Chemical phase-analysis for kyanites.

¹C-4, Mosaboni Mines, Singhbhum Bihar, India.

|May 1, 1978

Summary

This summary is machine-generated.

This study introduces a new hydrofluoric acid digestion method for quantifying kyanite in refractory aluminium silicate rocks. The technique separates kyanite from other minerals, enabling accurate analysis of refractory materials.

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Area of Science:

Mineralogy
Geochemistry
Materials Science

Background:

Accurate quantification of kyanite is crucial for assessing refractory aluminium silicate rocks.
Existing methods may not effectively differentiate kyanite from interfering minerals.

Purpose of the Study:

To develop and present a novel method for determining kyanite content.
To validate the method's effectiveness on refractory aluminium silicate rocks.

Main Methods:

Sample digestion using hydrofluoric acid (HF) for 2-3 hours.
Removal or complexation of excess HF.
Filtration, drying, and weighing of the undissolved residue (kyanite, topaz, tourmaline).
Application of corrections for kyanite solubility and topaz interference.

Main Results:

The HF digestion method effectively decomposes most non-refractory aluminium silicate minerals.
The method isolates kyanite, though interference from corundum, tourmaline, and certain garnets may occur.
Corrections can be applied to account for kyanite solubility and topaz presence.

Conclusions:

The presented method offers a viable approach for kyanite determination in refractory aluminium silicate rocks.
Careful consideration of potential interfering minerals is necessary for precise results.