# mercallite

> English word · Noun

## Definitions
1. An orthorhombic-dipyramidal mineral containing hydrogen, oxygen, potassium, and sulfur.

## Etymology
Named after Italian volcanologist Giuseppe Mercalli (1850–1914)

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/mercallite