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Kivuite

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Formula:
(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
Name:
named for the Kivu region
Originally reported from Kobokobo pegmatite, Lusungu River District, South Kivu, Democratic Republic of Congo (Zaïre).

Classification of Kivuite

Discredited 1962
Explanation of status:
Van Wambeke (1971, p. 1380) states kivuite "often a mixture of thorian crandallite or eylettersite with phosphuranylite."

ww.musee.ensmp.fr/specimen/kivuite.html lists kivuite as a 'doubtful or mixed variety' and a mixture of phosphuranylite+thorite, columbite
7/E.07-120
8.EC.10

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
42.4.9.3

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq·xH2O
19.11.35

19 : Phosphates
11 : Phosphates of U
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Optical Data of Kivuite

Type:
Biaxial (-)
RI values:
nα = 1.618 nβ = 1.654 nγ = 1.655
2V:
Calculated: 18°
Max Birefringence:
δ = 0.037
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
noticable

Chemical Properties of Kivuite

Formula:
(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
Essential elements:
All elements listed in formula:

Relationship of Kivuite to other Species

8.EC.05Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O
8.EC.05PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2O
8.EC.05UpaliteAl(UO2)3(PO4)2O(OH) · 7H2O
8.EC.05Françoisite-(Ce)(Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O
8.EC.10ArsenuranyliteCa(UO2)4(AsO4)2(OH)4 · 6H2O
8.EC.10DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
8.EC.10Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
8.EC.10YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2O
8.EC.15DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2O
8.EC.15HügelitePb2(UO2)3(AsO4)2O2 · 5H2O
8.EC.20MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2O
8.EC.20VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2O
8.EC.20ArsenovanmeersscheiteU4+(UO2)3(AsO4)2(OH)2 · 4H2O
8.EC.25AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2O
8.EC.30MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2O
8.EC.35PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2O
8.EC.40BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2O
19.11.1LermontoviteU(PO4)(OH) · H2O
19.11.2MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2O
19.11.3VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2O
19.11.4Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2O
19.11.5VyacheslaviteU(PO4)(OH) · nH2O
19.11.6MetanatroautuniteNa(UO2)(PO4)(H2O)3
19.11.7YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2O
19.11.8Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
19.11.9Uramphite(NH4)2(UO2)2(PO4)2 · 6H2O
19.11.10TorberniteCu(UO2)2(PO4)2 · 12H2O
19.11.11MetatorberniteCu(UO2)2(PO4)2 · 8H2O
19.11.12SaléeiteMg(UO2)2(PO4)2 · 10H2O
19.11.13NingyoiteCaU(PO4)2 · 1-2H2O
19.11.14Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
19.11.15AutuniteCa(UO2)2(PO4)2 · 11H2O
19.11.16Pseudo-autunite(H3O)4Ca2(UO2)2(PO4)4 · 5H2O
19.11.17PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2O
19.11.18Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
19.11.19UlrichiteCaCu(UO2)(PO4)2 · 4H2O
19.11.20BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2O
19.11.21Metauranocircite-IBa(UO2)2(PO4)2 · 7H2O
19.11.22UranocirciteBa(UO2)2(PO4)2 · 10H2O
19.11.23RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2O
19.11.24TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2O
19.11.25MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2O
19.11.26UpaliteAl(UO2)3(PO4)2O(OH) · 7H2O
19.11.27FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2O
19.11.28ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2O
19.11.29PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2O
19.11.30MoreauiteAl3(UO2)(PO4)3(OH)2 · 13H2O
19.11.31SabugaliteHAl(UO2)4(PO4)4 · 16H2O
19.11.32Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)
19.11.33AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2O
19.11.34Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O
19.11.36ParsonsitePb2(UO2)(PO4)2
19.11.37DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
19.11.38DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2O
19.11.39PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2O
19.11.40LehneriteMn2+(UO2)2(PO4)2 · 8H2O
19.11.41BassetiteFe2+(UO2)2(PO4)2 · 8H2O
19.11.42Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O

Other Names for Kivuite

Name in Other Languages:
German:Kivuit
Spanish:Kivuita

Other Information

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 Kivuite

Reference List:
Van Wambeke, L. (1958), "Contribution a l'etude de la mineralisation radioactive de la pegmatite de Kobokobo et description d'une nouvelle espece minerale radioactive de la serie phosphuranylite-renardite: la kivuite", Bull. soc.belge geol., palentol., et hydrol., 67,383-403".
[Abstract and Discussion: American Mineralogist (1959): 44,1326]

Canadian Mineralogist 7, 332-333(1962)

Van Wambeke, L. (1971),"The problem of cation deficiencies in some phosphates due to alteration processes", American Mineralogist 56, 1366-1384.

Ramdohr-Strunz (1978): 656.

Internet Links for Kivuite

Localities for Kivuite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
China
 
  • Yunnan Province
    • Baoshan Prefecture
      • Tengchong Co.
Anthony, J.W. et al.: Handbook of Mineralogy
    • Dehong Autonomous Prefecture
      • Yingjiang Co.
        • Tongbiguan
Anthony, J.W. et al.: Handbook of Mineralogy
Democratic Republic of Congo (Zaïre)
 
  • Sud-Kivu
    • Mwenga
Min. Mag. 33 (1962), 261
Mineral and/or Locality  
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