Rameauite
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| Rameauite | |
|---|---|
| General | |
| Category | Oxide mineral |
| Formula | K2Ca(UO2)6(OH)16·H2O or K2CaU6+6O20·9H2O |
| IMA symbol | Rme[1] |
| Strunz classification | 4.GB.05 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | C2/c |
| Unit cell | a= 13.97 Å, b= 14.26 Å c= 14.22 Å, β = 121.02°: Z = 4 |
| Identification | |
| Formula mass | 2,028.57 g/mol |
| Color | Orange |
| Crystal habit | Prismatic and/or can consist of a hexagonal outline |
| Twinning | On {100} |
| Cleavage | Good cleavage |
| Diaphaneity | Semitransparent |
| Density | 5.6 |
| Optical properties | Biaxial Negative |
| Refractive index | a= n.d. β= 1.95 γ= 1.97 |
| 2V angle | 32° (meas.) |
| Other characteristics |  Radioactive |
| References | [2][3][4] |
Rameauite is a hydrated complex uranyl oxide mineral with formula K2Ca(UO2)6(OH)16·H2O[5] or K2CaU6+6O20·9H2O.[4]