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Swamboite-(Nd)

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Formula:
Nd0.333[(UO2)(SiO3OH)](H2O)∼2.5
Colour:
Light yellow
Hardness:
Crystal System:
Monoclinic
Name:
Named after its discovery locality, in the Swambo deposit, Democratic Republic of the Congo (Zaire). Renamed by IMA as Swamboite-(Nd) in 2017.
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). This makes swamboite-(Nd) the third Nd-U mineral.


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Classification of Swamboite-(Nd)Hide

Approved
Notes:
Redefined by the IMA, Renamed by the IMA
Approval Year:
1981
Approval History:
Redefined and renamed as Swamboite-(Nd) by IMA in febr. 2017 (Proposal 17-A)
9.AK.20

9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates
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)
14.16.4

14 : Silicates not Containing Aluminum
16 : Silicates of U

Physical Properties of Swamboite-(Nd)Hide

Colour:
Light yellow
Hardness:
2½ on Mohs scale

Optical Data of Swamboite-(Nd)Hide

Type:
Biaxial (-)
RI values:
nα = 1.640 nβ = 1.661 nγ = 1.663
2V:
Measured: 34° , Calculated: 32°
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v moderate

Chemical Properties of Swamboite-(Nd)Hide

Formula:
Nd0.333[(UO2)(SiO3OH)](H2O)∼2.5
IMA Formula:
Nd0.333[(UO2)(SiO3OH)](H2O)~2.5

Crystallography of Swamboite-(Nd)Hide

Crystal System:
Monoclinic
Cell Parameters:
a = 17.64 Å, b = 21 Å, c = 20.12 Å
β = 103.42°
Ratio:
a:b:c = 0.84 : 1 : 0.958
Unit Cell V:
7,249.74 ų (Calculated from Unit Cell)

Type Occurrence of Swamboite-(Nd)Hide

Synonyms of Swamboite-(Nd)Hide

Other Language Names for Swamboite-(Nd)Hide

German:Swamboit
Spanish:Swamboita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Soddyite10 photos of Swamboite-(Nd) associated with Soddyite on mindat.org.
Uraninite1 photo of Swamboite-(Nd) associated with Uraninite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AK.05Soddyite(UO2)2SiO4 · 2H2OOrth.
9.AK.10CuprosklodowskiteCu(UO2)2(SiO3OH]2 · 6H2OTric. 1 : P1
9.AK.10OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmca
9.AK.10SklodowskiteMg(UO2)2(SiO3OH)2 · 6H2OMon. 2/m : B2/m
9.AK.15Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2OMon. 2 : P21
9.AK.15KasolitePb(UO2)[SiO4] · H2OMon. 2/m : P21/b
9.AK.15NatroboltwooditeNa(UO2)(SiO3OH) · H2O
9.AK.15Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2OMon.
9.AK.15UranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2 : P21
9.AK.15Beta-UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
9.AK.25HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2OMon.
9.AK.25MetahaiweeiteCa(UO2)2Si6O15 · nH2O
9.AK.25RanquiliteCa(UO2)2[Si5O12(OH)2] · 6H2O
9.AK.30WeeksiteK2(UO2)2(Si5O13) · 4H2OOrth.
9.AK.30CoutinhoiteThxBa(1-2x)(UO2)2Si5O13 · (H2O)1+y (0 < x < 0.5 and 0 < y < (2+x))Orth.
9.AK.35UrsiliteMg4(UO2)4(Si2O5)5.5(OH)5 · 13H2OOrth.
9.AK.35MagnioursiliteMg4(UO2)4(Si2O5)5(OH)6 · 20H2O
9.AK.35CalcioursiliteCa4(UO2)4(Si2O5)5(OH)6 · 15H2O
9.AK.40UranosiliteUO3 · 7SiO2Orth.

Related Minerals - Dana Grouping (8th Ed.)Hide

53.3.1.1KasolitePb(UO2)[SiO4] · H2OMon. 2/m : P21/b
53.3.1.2UranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2 : P21
53.3.1.3SklodowskiteMg(UO2)2(SiO3OH)2 · 6H2OMon. 2/m : B2/m
53.3.1.4CuprosklodowskiteCu(UO2)2(SiO3OH]2 · 6H2OTric. 1 : P1
53.3.1.5Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2OMon. 2 : P21
53.3.1.6NatroboltwooditeNa(UO2)(SiO3OH) · H2O
53.3.1.7OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmca
53.3.1.9Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.16.1UranosiliteUO3 · 7SiO2Orth.
14.16.2Coffinite(U4+,Th)(SiO4)1-x(OH)4xTet.
14.16.3Soddyite(UO2)2SiO4 · 2H2OOrth.
14.16.5WeeksiteK2(UO2)2(Si5O13) · 4H2OOrth.
14.16.6Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2OMon. 2 : P21
14.16.7NatroboltwooditeNa(UO2)(SiO3OH) · H2O
14.16.8CuprosklodowskiteCu(UO2)2(SiO3OH]2 · 6H2OTric. 1 : P1
14.16.9SklodowskiteMg(UO2)2(SiO3OH)2 · 6H2OMon. 2/m : B2/m
14.16.10UranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2 : P21
14.16.11Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2OMon.
14.16.12HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2OMon.
14.16.13MetahaiweeiteCa(UO2)2Si6O15 · nH2O
14.16.15SteacyiteK0.3(Na,Ca)2ThSi8O20Tet. 4/mmm (4/m 2/m 2/m) : P4/mcc
14.16.16EkaniteCa2ThSi8O20Tet. 4 2 2 : I4 2 2
14.16.17KasolitePb(UO2)[SiO4] · H2OMon. 2/m : P21/b
14.16.18OrlitePb3(UO2)3(Si2O7)2 · 6H2O
14.16.19OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmca

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Swamboite-(Nd)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Deliens, M. & Piret, P. (1981): La swamboïte, nouveau silicate d'uranium hydraté du shaba, Zaïre. Canadian Mineralogist 19, 553-557.
American Mineralogist (1983): 68: 1250.
CNMNC Newsletter No. 36, April 2017, Mineralogical Magazine, 81, 403–409

Internet Links for Swamboite-(Nd)Hide

Localities for Swamboite-(Nd)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Democratic Republic of Congo (Zaïre) (TL)
 
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Swambo
Canadian Mineralogist(1981) 19, 553-557; Lapis 17(3), 13-40 (1992)
USA
 
  • Utah
    • San Juan Co.
      • White Canyon District
        • White Canyon
R&M 75:4 p240-248
Mineral and/or Locality  
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