Mineral · Olivenite group
Adamite
Zn2(AsO4)(OH)
Adamite is zinc arsenate, the yellow-green fans and radiating sprays on limonite from the Ojuela Mine (Mapimí, Mexico), and the copper-bearing 'cuproadamite' and purple manganoan adamite of the same mine. It fluoresces bright green under UV. It contains arsenic and should be handled accordingly.
| Formula | Zn2(AsO4)(OH) |
|---|---|
| IMA status | grandfathered |
| Crystal system | Orthorhombic |
| Mohs hardness | 3.5 |
| Group | Olivenite group |
| Type locality | Chañarcillo, Chile |
| Streak | White |
| Specific gravity | 4.4 |
| Reference list | IMA List of Minerals (RRUFF) — verify formula and status against the current list |
Handling and safety
Arsenate; wash hands and avoid dust.
Elsewhere
Cite this article
Stratum Strata. "Adamite" (Mineral). Stratum Strata pack 2026.09, as of 2026-09-21. https://stratum.black/strata/minerals/adamite. Accessed 2026-09-21.
@misc{stratum-adamite,
title = {Adamite},
author = {{Stratum Strata}},
howpublished = {\url{https://stratum.black/strata/minerals/adamite}},
year = {2026},
note = {Mineral article, Stratum Strata pack 2026.09, as of 2026-09-21; sources: stratum, wikidata, commons. Accessed 2026-09-21.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.