| Heinrichite | |
| Category: | Phosphate mineral |
| Formula: | Ba(UO2)2(AsO4)2·10H20 |
| Imasymbol: | Hrc[1] |
| Strunz: | 8.EB.05 |
| Dana: | 40.2a.9.1 |
| System: | Monoclinic |
| Class: | Strunz |
| Unit Cell: | a = 7.155 Å, b = 7.134 Å, c = 21.29 Å β = 104.171 |
| Color: | Pale yellow, pale green |
| Refractive: | nω = 1.605 nε = 1.573 |
| Opticalprop: | uniaxial (−) |
| Birefringence: | 0.032 |
| Fluorescence: | Yellow-green in longwave and shortwave UV |
| Streak: | Pale yellow |
| Other: | Radioactive |
| References: | [2] |
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.
Heinrichite is radioactive pale green, pale yellow mineral. Heinrichite fluoresces light-green in longwave and shortwave ultraviolet.[3] Because of its uranium content, the mineral is radioactive.[3]