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Silicate

Radekškodaite-(La)

(CaLa₅)(Al₄Fe²⁺)[Si₂O₇][SiO₄]₅O(OH)₃
Hardness6.5
Crystal systemMonoclinic
ClassSilicate
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Radekškodaite-(La)

Radekškodaite-(La) is an IMA-recognized mineral species in the silicate class, with the chemical formula (CaLa₅)(Al₄Fe²⁺)[Si₂O₇][SiO₄]₅O(OH)₃.

It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Radekškodaite structural group.

Key properties: Mohs hardness 6.5; specific gravity 4.644; Brown streak; Vitreous luster; optically biaxial.

IMA symbol Ršk-La, IMA status: approved, named in 2018.

Found in polymineralic nodules at the Mochalin Log REE deposit, typically intergrown with ferriperbøeite-(La).

It is found associated with Allanite-(Ce), allanite-(La), bastnäsite-(Ce), bastnäsite-(La), ferriallanite-(Ce), ferriallanite-(La), ferriperbøeite-(La), fluorbritholite-(Ce).

The mineral was named to honor Czech mineralogist Radek Škoda (b. 1979), Associate Professor at Masaryk University, Brno, Czech Republic. The suffix indicates the dominant rare earth element.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more R minerals or help write this entry.