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Swamboite-(Nd)

A valid IMA mineral species
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Originally described as a new mineral with a formula U0.333H2(UO2SiO4)2·10H2O.

The correct formula is: Nd0.333[(UO2)(SiO3OH)](H2O)∼2.5; the formula and name were changed in 2017 (IMA 17-A redefinition/renaming proposal).


Unique Identifiers
IMA status notes:
Redefined by the IMA, Renamed by the IMA

IMA Formula:
Nd0.333[(UO2)(SiO3OH)](H2O)~2.5
Approval year:
1981
Approval history:
Redefined and renamed as Swamboite-(Nd) by IMA in febr. 2017 (Proposal 17-A)
Type description reference:
Deliens, M., Piret, P. (1981) La swamboïte, nouveau silicate d'uranium hydraté du shaba, Zaïre.The Canadian Mineralogist, 19 (4) 553-557

Classification of Swamboite-(Nd)

9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates

Dana 8th ed.:
53.3.1.8

53 : NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
3 : Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Hey's CIM Ref.:
14.16.4

14 : Silicates not Containing Aluminum
16 : Silicates of U

Mineral Symbols
Surface Relief:
Moderate
Dispersion:
r < v moderate
Pleochroism:
Visible
Comments:
X = colorless; Y = Z = light yellow

Chemistry of Swamboite-(Nd)

Crystallography of Swamboite-(Nd)
General Appearance of Type Material:
acicular crystals
Place of Conservation of Type Material:
Royal Museum of Central Africa, Tervuren, Belgium, RGM13690.
Associated Minerals at Type Locality:
SoddyiteGypsumCurite
Reference:
Deliens, M., Piret, P. (1981) La swamboïte, nouveau silicate d'uranium hydraté du shaba, Zaïre.The Canadian Mineralogist, 19 (4) 553-557

Synonyms of Swamboite-(Nd)

Other Language Names for Swamboite-(Nd)

Common Associates9.AK.05Soddyite(UO2)2SiO4 · 2H2OOrth.mmm(2/m2/m2/m) :Fddd9.AK.10SklodowskiteMg(UO2)2(SiO3OH)2 · 6H2OMon. 2/m :B2/m9.AK.10CuprosklodowskiteCu(UO2)2(SiO3OH)2 · 6H2OTric.1 :P19.AK.10OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth.mmm(2/m2/m2/m) :Cmca9.AK.15ParauranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2/m :P21/b9.AK.15UranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2 :P219.AK.15NatroboltwooditeNa(UO2)(SiO3OH) · H2OOrth. 222 :P2121219.AK.15KasolitePb(UO2)(SiO4) · H2OMon. 2/m :P21/b9.AK.15Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2OMon. 2 :P219.AK.25HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2OOrth.mmm(2/m2/m2/m) :Pbcn9.AK.25MetahaiweeiteCa(UO2)2Si6O15 · nH2OMon. 2/m :P2/b9.AK.30WeeksiteK2(UO2)2(Si5O13) · 4H2OMon. 2/m :B2/m9.AK.30CoutinhoiteThxBa(1-2x)(UO2)2Si5O13 · (H2O)1+y (0 < x < 0.5 and 0 < y < (2+x))Orth.mmm(2/m2/m2/m)9.AK.30Barronite(◻0.5Ba0.5)(UO2)2Si5O12(OH) · 2H2OMon. 2/m :B2/m9.AK.35MagnioursiliteMg4(UO2)4(Si2O5)5(OH)6 · 20H2O9.AK.35CalcioursiliteCa4(UO2)4(Si2O5)5(OH)6 · 15H2OOrth.9.AK.40UranosiliteUO3 · 7SiO2Orth.

Radioactivityshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).

D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield

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    • References for Swamboite-(Nd)ⓘLagoa Real uranium provincePires et al. (2014)
    DR Congo (TL)
     
    Deliens et al. (1981)+2 other references
    USA
     
    Haynes (2000)
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