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The description of octahedral crystals using five parameters
Dmitry G Stepenshchikov1, Anton D Pavlushin2
1Geological Institute, Kola Science Centre, Russian Academy of Sciences, Apatity, 184209, Russian Federation.
A new method uses five measurements to define octahedral crystal shapes, including incomplete forms like diamonds. This approach aids in crystallo-morphological analysis and mineral prospecting.
Area of Science:
- Crystallography
- Mineralogy
- Geology
Background:
- Octahedral crystals possess complex shapes that are challenging to quantify.
- Describing 'real crystal form,' including incomplete or unequally developed facets, is crucial for mineral typomorphism.
Purpose of the Study:
- To develop a concise numerical method for uniquely defining the shape of flat-faceted octahedral crystals.
- To enable the description of both complete and incomplete octahedral crystal forms.
Main Methods:
- Utilizing measured distances between parallel facets and the length of a false edge.
- Deriving interdependencies between parameters to ensure measurement accuracy.
Main Results:
- A method involving only five numerical values accurately defines octahedral crystal shapes.
- The method accommodates full-faceted and incomplete octahedral crystals, such as diamonds.
Conclusions:
- The proposed five-parameter method offers a robust way to describe octahedral crystal morphology.
- This technique is valuable for crystallo-morphological analysis, shape restoration, and diamond prospecting.
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