RT Journal Article
T1 Ni-sepiolite-falcondoite in garnieritemineralization from the FalcondoNi-laterite deposit, Dominican Republic
A1 Tauler, Esperança
A1 Proenza, Joaquín A.
A1 Galí Medina, Salvador
A1 Lewis, John F.
A1 Labrador Carrasco, Manuel
A1 García Romero, Emilia
A1 Súarez Barrios, Mercedes
A1 Longo, Francisco
A1 Bloise, Giovanni
AB New chemical and structural data on sepiolite-falcondoite in garnierite veins fromthe Falcondo Ni-laterite deposits, central Dominican Republic, are reported. Samples of Ni-sepiolitefalcondoitevary in colour from whitish green to green depending on the NiO content (wt.%) and theamount of silica present. The texture is normally schistose and friable but samples with considerablequartz and/or amorphous silica are compact and hard. Back-scattered electron images indicate thatthe samples are composed of at least three generations of Ni-sepiolite-falcondoite. The extremerefined cell parameters for Ni-sepiolite-falcondoite vary from 13.400(2), 27.006(4), 5.273(1) A˚ to13.340(3), 27.001(6), 5.267(1) A˚ (space group Pncn). As the Ni content increases there is a smallreduction in the a parameter. Chemical compositions determined by electron probe microanalysiscover a large interval of the Ni-sepiolite-falcondoite solid solution (Fal3 and Fal77). Individualsamples show a considerable range in composition with the widest range determined in one samplefrom 4.63 to 22.40 wt.% NiO.
PB Mineralogical Society
SN 0009-8558
YR 2009
FD 2009
LK https://hdl.handle.net/20.500.14352/50683
UL https://hdl.handle.net/20.500.14352/50683
LA eng
DS Docta Complutense
RD 18 abr 2025