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Metavanmeersscheite

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Formula:
U6+(UO2)3(PO4)2(OH)6 · 2H2O
Colour:
Medium yellow, canary yellow
Lustre:
Waxy, Dull, Earthy
Specific Gravity:
4.49 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in 1982 by Paul Piret and Michel Deliens for the dehydrated relationship, "meta-" and the parent mineral vanmeersscheite.
This page provides mineralogical data about Metavanmeersscheite.


Classification of Metavanmeersscheite

Approved
Approval Year:
1981
7/E.07-150
8.EC.20

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
42.7.14.2

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
19.11.2

19 : Phosphates
11 : Phosphates of U

Physical Properties of Metavanmeersscheite

Waxy, Dull, Earthy
Transparency:
Translucent
Colour:
Medium yellow, canary yellow
Streak:
Very pale yellow
Tenacity:
Brittle
Cleavage:
Distinct/Good
(100)
Fracture:
Irregular/Uneven
Density:
4.49 g/cm3 (Calculated)

Optical Data of Metavanmeersscheite

Type:
Biaxial (-)
RI values:
nα = 1.670 nβ = 1.680 nγ = 1.690
2V:
Measured: 83° , Calculated: 88°
Birefringence:
0.02
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v strong
Pleochroism:
Weak
Comments:
White and yellow to pale yellow

Chemical Properties of Metavanmeersscheite

Formula:
U6+(UO2)3(PO4)2(OH)6 · 2H2O
IMA Formula:
U(UO2)3(PO4)2(OH)6 · 2H2O

Crystallography of Metavanmeersscheite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Fddd
Setting:
Fddd
Cell Parameters:
a = 34.18 Å, b = 33.88 Å, c = 14.07 Å
Ratio:
a:b:c = 1.009 : 1 : 0.415
Unit Cell V:
16,293.32 ų (Calculated from Unit Cell)
Z:
32
Morphology:
Thin platy crystals, also compact massive to earthy

X-Ray Powder Diffraction

Powder Diffraction Data:
d-spacingIntensity
8.49 (100)
6.01 (90)
5.38 (50)
4.23 (50)
3.516 (50)
3.073 (70)
2.886 (60)

Type Occurrence of Metavanmeersscheite

Geological Setting of Type Material:
Granite pegmatite
Associated Minerals at Type Locality:

Synonyms of Metavanmeersscheite

Other Language Names for Metavanmeersscheite

Common Associates

Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Associated Minerals Based on Photo Data:
Zeunerite3 photos of Metavanmeersscheite associated with Zeunerite on mindat.org.

Related Minerals - Nickel-Strunz Grouping

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.10Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
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.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

Related Minerals - Hey's Chemical Index of Minerals Grouping

19.11.1LermontoviteU(PO4)(OH) · H2O
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
19.11.35Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
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 · 10H2O
19.11.42Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O

Related Minerals - Dana Grouping (8th Ed.)

42.7.14.1VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2O
42.7.14.3ArsenovanmeersscheiteU4+(UO2)3(AsO4)2(OH)2 · 4H2O

Fluorescence of Metavanmeersscheite

Fluoresces bright green to yellow green in SW an LW UV (Kobokobo).

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 Metavanmeersscheite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Piret, P. & Deliens, M. (1982): Vanmeersscheite U(UO2)3(PO4)2(OH)6.4H2O and meta-vanmeersscheite U(UO2)3(PO4)2(OH)6.2H2O, new minerals. Bulletin de Minéralogie, 105, 125-128 (in French).
American Mineralogist (1982): 67: 1077.

Internet Links for Metavanmeersscheite

mindat.org URL:
https://www.mindat.org/min-2692.html
Please feel free to link to this page.

Localities for Metavanmeersscheite

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.
(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.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Ústí Region
      • Krušné Hory Mts (Erzgebirge)
        • Dubí (Eichwald)
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)]
Democratic Republic of Congo (Zaïre) (TL)
 
  • Sud-Kivu
    • Mwenga
Piret, P. & Deliens, M. (1982): Vanmeersscheite U(UO2)3(PO4)2(OH)6.4H2O and meta-vanmeersscheite U(UO2)3(PO4)2(OH)6.2H2O, new minerals. Bulletin de Minéralogie, 105, 125-128 (in French). American Mineralogist, volume 67, pp. 1077(1982)
Germany
 
  • Saxony
    • Erzgebirge
      • Johanngeorgenstadt District
Maggie Wilson
Italy
 
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Giudicarie Valleys
        • Chiese Valley
          • Condino
Campostrini, I., Demartin, F., & Gramaccioli, C. M. (2006). Rio Giulis. Minerali secondari del giacimento uranifero presso Condino, Trento. Rivista Mineralogica Italiana, 30(3), 152-165.
USA
 
  • Maine
    • Oxford Co.
      • Newry
Gene Foord, personal communication, 1993 and King and Foord, 1994, Mineralogy of Maine listing both ends of the hydration series "vanmeersscheite/metavanmeersscheite"
Mineral and/or Locality  
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