heinrichite

{{Infobox mineral

| name = Heinrichite

| category = Phosphate mineral

| image = Abernathyite, Heinrichite-497484.jpg

| imagesize = 260px

| caption = Green heinrichite crystals and pale yellow abernathyite crystals

| formula = Ba(UO₂)₂(AsO₄)₂·10H₂0

| IMAsymbol = Hrc{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3 |pages=291–320|doi=10.1180/mgm.2021.43 |bibcode=2021MinM...85..291W |s2cid=235729616 |doi-access=free}}

| molweight =

| strunz = 8.EB.05

| dana = 40.2a.9.1

| system = Monoclinic

| class = Strunz

| symmetry =

| unit cell = a = 7.155 Å, b = 7.134 Å, c = 21.29 Å β = 104.171

| color = Pale yellow, pale green

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| refractive = nω = 1.605 nε = 1.573

| opticalprop = uniaxial (−)

| birefringence = 0.032

| 2V =

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| fluorescence= Yellow-green in longwave and shortwave UV

| absorption =

| streak = Pale yellow

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| other = 25px Radioactive

| references ={{cite web|title=Heinrichite|url=https://www.mindat.org/min-1848.html|publisher=Mindat|accessdate=November 20, 2020|archive-date=November 28, 2020|archive-url=https://web.archive.org/web/20201128180318/https://www.mindat.org/min-1848.html|url-status=live}}

}}

Heinrichite is a monoclinic-prismatic containing arsenic, barium, hydrogen, oxygen, and uranium. The mineral is named after Eberhardt William Heinrich (1918–1991) who first noted it in 1958 in the U.S. State of Oregon.