Lepersonnite-(Nd)

lepersonnite-(Nd)

curite

soddyite

swamboite-(Nd)

Images

Formula: [Nd(H2O)18(OH)2][Nd(UO2)12(SiO3OH)2(CO3)4(OH)10O2(H2O)5]
Valence: [Nd(H2O)18(OH)2][Nd(U6+O2)12(SiO3OH)2(CO3)4(OH)10O2(H2O)5]
Uranyl carbonate, neodymium-bearing mineral
Crystal system: Orthorhombic
Specific gravity: 4.12 calculated
Hardness: 1½
Streak: Pale yellow
Colour: Yellow
Solubility: Soluble in dilute hydrochloric acid (10 %), releasing CO₂ and leaving a residue of amorphous silica
RADIOACTIVE
Environments


Neodymium-(Nd) is a new mineral, approved in 2021 and to date (January 2026) reported only from the type locality.

Localities

At the type locality, Swambo Hill, Kambove Territory, Haut-Katanga, DR Congo, lepersonnite-(Nd) occurs as radial to acicular aggregates composed of long prismatic, thin crystals, as the product of hydration–oxidation weathering of uraninite (MM 89.549-565).
Associated minerals include curite, native gold, soddyite, studtite and swamboite-(Nd) (Mindat).
Lepersonnite-(Nd) from Swambo Hill - Image

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