Metavandendriesscheite
A valid IMA mineral species - grandfathered
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Adriaan Vandendriessche
Formula:
PbU7O22 · nH2O n < 12
Colour:
Amber-yellow, yellowish orange, orange
Hardness:
3
Specific Gravity:
5.45
Crystal System:
Orthorhombic
Name:
Named after the resemblance with vandendriesscheite and containing fewer water molecules.
This page provides mineralogical data about Metavandendriesscheite.
Unique Identifiers
Mindat ID:
2691
Long-form identifier:
mindat:1:1:2691:4
GUID
(UUID V4):
(UUID V4):
06c7f91b-6e5c-42df-8277-ce389548c785
IMA Classification of Metavandendriesscheite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
PbU7O22 · nH2O
First published:
1960
Classification of Metavandendriesscheite
4.GB.40
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
5.8.1.2
5 : OXIDES CONTAINING URANIUM OR THORIUM
8 : AX7O22·xH2O
5 : OXIDES CONTAINING URANIUM OR THORIUM
8 : AX7O22·xH2O
7.16.29
7 : Oxides and Hydroxides
16 : Oxides of U
7 : Oxides and Hydroxides
16 : Oxides of U
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Mvdd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Metavandendriesscheite
Transparency:
Transparent
Colour:
Amber-yellow, yellowish orange, orange
Hardness:
3 on Mohs scale
Density:
5.45 g/cm3 (Measured) 5.75(4) g/cm3 (Calculated)
Optical Data of Metavandendriesscheite
Type:
Biaxial (-)
RI values:
nα = 1.780 nβ = 1.850 nγ = 1.860
2V:
Measured: 60° , Calculated: 40°
Max Birefringence:
δ = 0.080
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v distinct
Pleochroism:
Visible
Comments:
X = nearly colorless; Y = Z = yellow-orange to golden yellow.
Comments:
optical properties are for vandendriesscheite
Chemistry of Metavandendriesscheite
Mindat Formula:
PbU7O22 · nH2O n < 12
Elements listed:
Crystallography of Metavandendriesscheite
Crystal System:
Orthorhombic
Cell Parameters:
a = 14.07(30) Å, b = 41.31(30) Å, c = 43.33(30) Å
Ratio:
a:b:c = 0.341 : 1 : 1.049
Unit Cell V:
25,184.77 ų (Calculated from Unit Cell)
Z:
35
Comment:
Point Group: [2/m 2/m 2/m or mm2] ; Space Group: [Pmma, P21ma, or Pm2a] (by analogy to vandendriesscheite)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.24 Å | (100) |
| 3.61 Å | (100) |
| 3.17 Å | (75) |
| 1.985 Å | (40) |
| 3.53 Å | (25b) |
| 2.522 Å | (25) |
| 2.034 Å | (15) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Metavandendriesscheite
General Appearance of Type Material:
very fine-grained alteration product
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA, 106523
Geological Setting of Type Material:
oxidized zone of a uranium-bearing mineral deposit
Associated Minerals at Type Locality:
Reference:
Christ, C.L., Clark, J.R. (1960) Crystal chemical studies of some uranyl oxide hydrates. American Mineralogist: 45: 1026-1061.
Other Language Names for Metavandendriesscheite
Related Minerals - Strunz-mindat Grouping
| 4.GB.05 | Agrinierite | K2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2O |
| 4.GB.05 | Compreignacite | K2(UO2)6O4(OH)6 · 7H2O |
| 4.GB.05 | Rameauite | K2Ca(UO2)6O6(OH)4 · 6H2O |
| 4.GB.10 | Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| 4.GB.10 | Billietite | Ba(UO2)6O4(OH)6 · 4-8H2O |
| 4.GB.10 | Protasite | Ba(UO2)3O3(OH)2 · 3H2O |
| 4.GB.15 | Richetite | (Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24 · 41H2O |
| 4.GB.20 | Bauranoite | Ba(UO2)2(OH)6 · 1-2H2O |
| 4.GB.20 | Calciouranoite | (Ca,Ba,Pb)U2O7 · 5H2O |
| 4.GB.20 | Metacalciouranoite | (Ca,Ba,Pb,K2)U2O7 · 2H2O |
| 4.GB.25 | Fourmarierite | Pb(UO2)4O3(OH)4 · 4H2O |
| 4.GB.30 | Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
| 4.GB.35 | Masuyite | Pb(UO2)3O3(OH)2 · 3H2O |
| 4.GB.40 | Vandendriesscheite | PbU7O22 · 12H2O |
| 4.GB.45 | Vandenbrandeite | Cu(UO2)(OH)4 |
| 4.GB.50 | Sayrite | Pb2(UO2)5O6(OH)2 · 4H2O |
| 4.GB.55 | Curite | Pb3(H2O)2[(UO2)4O4(OH)3]2 |
| 4.GB.60 | Iriginite | (UO2)Mo2O7 · 3H2O |
| 4.GB.65 | Uranosphaerite | Bi(UO2)O2(OH) |
| 4.GB.70 | Holfertite | CaxU6+2-xTi(O8-xOH4x) · 3H2O |
| 4.GB.75 | Carlosbarbosaite | (UO2)2Nb2O6(OH)2 · 2H2O |
| 4.GB.80 | Gauthierite | KPb[(UO2)7O5(OH)7] · 8H2O |
| 4.GB.85 | Kroupaite | KPb0.5[(UO2)8O4(OH)10] · 10H2O |
| 4.GB.90 | Leesite | K(H2O)2[(UO2)4O2(OH)5] · 3H2O |
| 4.GB.95 | Shinkolobweite | Pb1.25[U5+(H2O)2(U6+O2)5O8(OH)2](H2O)5 |
| 4.GB.95 | Nollmotzite | Mg[U5+(U6+O2)2O4F3] · 4H2O |
Other Information
Special Storage/
Display Requirements:
Display Requirements:
Alters from vandendriesscheite by dehydration
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Metavandendriesscheite
mindat.org URL:
https://www.mindat.org/min-2691.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
References for Metavandendriesscheite
Localities for Metavandendriesscheite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
DR Congo (TL) | |
| |
USA | |
