Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. mineral

Anotations

Scope note:

Syngenite is a hydrous sulfate of calcium and potassium occurring in tabular crystals. It is sometimes found as a salt deposit on masonry surfaces, a gray-white bloom on walls facing the prevailing wind and rain.