Metavivianite
A valid IMA mineral species
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About Metavivianite
Formula:
Fe2+Fe3+2(PO4)2(OH)2 · 6H2O
Colour:
Dark blue to blue-black; dark green to green-black
Lustre:
Sub-Vitreous, Resinous, Greasy, Dull
Hardness:
1½ - 2
Specific Gravity:
2.69 (Calculated)
Crystal System:
Triclinic
Name:
Named by C. Ritz, Eric J. Essene, and Donald R. Peacor in 1974 for its structural relationship to vivianite.
Type Locality:
Dimorph of:
Isostructural with:
Unique Identifiers
Mindat ID:
2695
Long-form identifier:
mindat:1:1:2695:2
IMA Classification of Metavivianite
Approved
First published:
1974
Classification of Metavivianite
8.DC.25
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
40.11.9.4
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
11 :
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
11 :
19.13.12
19 : Phosphates
13 : Phosphates of Fe alone
19 : Phosphates
13 : Phosphates of Fe alone
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 |
|---|---|---|
| Mviv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Metavivianite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Metavivianite
Sub-Vitreous, Resinous, Greasy, Dull
Transparency:
Translucent
Colour:
Dark blue to blue-black; dark green to green-black
Streak:
Blue or greenish blue
Hardness:
1½ - 2 on Mohs scale
Tenacity:
Sectile
Cleavage:
Perfect
{110}
{110}
Density:
2.69 g/cm3 (Calculated)
Optical Data of Metavivianite
Type:
Biaxial (+)
RI values:
nα = 1.600 - 3 nβ = 1.640 - 3 nγ = 1.685 - 3
2V:
Measured: 85° (5), Calculated: 90°
Birefringence:
0.50
Max. Birefringence:
δ = 0.000 - 0.085
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
very weak
Optical Extinction:
X perpendicular to {010}, Y parallel {110}
Pleochroism:
Visible
Comments:
X blue to blue green, Y,Z yellow green
Chemistry of Metavivianite
Mindat Formula:
Fe2+Fe3+2(PO4)2(OH)2 · 6H2O
Element Weights:
Elements listed:
Crystallography of Metavivianite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 7.989(1) Å, b = 9.321(2) Å, c = 4.629(1) Å
α = 97.34(1)°, β = 95.96(1)°, γ = 108.59(2)°
α = 97.34(1)°, β = 95.96(1)°, γ = 108.59(2)°
Ratio:
a:b:c = 0.857 : 1 : 0.497
Unit Cell V:
320.18 ų
Z:
1
Morphology:
Bladed crystals, often with irregular acute multiple terminations.
Twinning:
{110}
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012078 | Metavivianite | Dormann J, Gasperin M, Poullen J F (1982) Etude structurale de la sequence d'oxydation de la vivianite Fe3(PO4)2*8(H2O) Bulletin de Mineralogie 105 147-160 | 1982 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.59 Å | (40) |
| 6.71 Å | (100) |
| 4.86 Å | (40) |
| 4.27 Å | (10) |
| 3.97 Å | (30) |
| 3.07 Å | (10) |
| 2.90 Å | (20) |
| 2.77 Å | (30) |
Comments:
ICDD 29-1137
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 24 : Authigenic minerals in terrestrial sediments (see also #17) | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Geological Setting:
Phosphate veins in ironstone
Phosphatic sedimentary units
Phosphatic sedimentary units
Type Occurrence of Metavivianite
General Appearance of Type Material:
Blue black or green black bladed crystals
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 127100.
Geological Setting of Type Material:
Late stage oxidation of vivianite in a granite pegmatite
Associated Minerals at Type Locality:
Synonyms of Metavivianite
Other Language Names for Metavivianite
Dutch:Metavivianiet
German:Metavivianit
Russian:Метавивианит
Simplified Chinese:三斜蓝铁矿
Spanish:Metavivianita
Traditional Chinese:三斜藍鐵礦
Common Associates
Associated Minerals Based on Photo Data:
| 19 photos of Metavivianite associated with Santabarbaraite | Fe3+3(PO4)2(OH)3 · 5H2O |
| 11 photos of Metavivianite associated with Vivianite | Fe2+Fe2+2(PO4)2 · 8H2O |
| 6 photos of Metavivianite associated with Siderite | FeCO3 |
| 3 photos of Metavivianite associated with Baryte | BaSO4 |
| 3 photos of Metavivianite associated with Limonite | |
| 2 photos of Metavivianite associated with Berthierine | (Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4 |
| 1 photo of Metavivianite associated with Anglesite | PbSO4 |
| 1 photo of Metavivianite associated with Kertschenite | |
| 1 photo of Metavivianite associated with Kryzhanovskite | (Fe3+,Mn2+)3(PO4)2(OH,H2O)3 |
| 1 photo of Metavivianite associated with Quartz | SiO2 |
Related Minerals - Strunz-mindat Grouping
| 8.DC. | Césarferreiraite | Fe2+ Fe3+2(AsO4)2(OH)2 · 8H2O |
| 8.DC. | Ferrivauxite | Fe3+Al2(PO4)2(OH)3 · 5H2O |
| 8.DC. | Ianbruceite | Zn2(AsO4)(OH) · 3H2O |
| 8.DC.05 | Nissonite | Cu2Mg2(PO4)2(OH)2 · 5H2O |
| 8.DC.07 | Euchroite | Cu2(AsO4)(OH) · 3H2O |
| 8.DC.10 | Legrandite | Zn2(AsO4)(OH) · H2O |
| 8.DC.12 | Strashimirite | Cu8(AsO4)4(OH)4 · 5H2O |
| 8.DC.15 | Earlshannonite | Mn2+Fe3+2(PO4)2(OH)2 · 4H2O |
| 8.DC.15 | Kunatite | CuFe3+2(PO4)2(OH)2 · 4H2O |
| 8.DC.15 | UM2006-27-PO:FeHZn | ZnFe3+2(PO4)2(OH)2 · 4H2O |
| 8.DC.15 | UKI-2006-(PO:AlCuFeH) | Fe2+Al3+2(PO4)2(OH)2 · 4H2O |
| 8.DC.15 | Cobaltarthurite | CoFe3+2(AsO4)2(OH)2 · 4H2O |
| 8.DC.15 | Arthurite | CuFe3+2(AsO4)2(OH)2 · 4H2O |
| 8.DC.15 | Ojuelaite | ZnFe3+2(AsO4)2(OH)2 · 4H2O |
| 8.DC.15 | Whitmoreite | Fe2+Fe3+2(PO4)2(OH)2 · 4H2O |
| 8.DC.15 | Bendadaite | Fe2+Fe3+2(AsO4)2(OH)2 · 4H2O |
| 8.DC.17 | Kleemanite | ZnAl2(PO4)2(OH)2 · 3H2O |
| 8.DC.20 | Magnesiobermanite | MgMn3+2(PO4)2(OH)2 · 4H2O |
| 8.DC.20 | Bermanite | Mn2+Mn3+2(PO4)2(OH)2 · 4H2O |
| 8.DC.20 | Coralloite | Mn2+Mn3+2(AsO4)2(OH)2 · 4H2O |
| 8.DC.22 | Kovdorskite | Mg2(PO4)(OH) · 3H2O |
| 8.DC.25 | Zincostrunzite | ZnFe3+2(PO4)2(OH)2 · 6.5H2O |
| 8.DC.25 | Metavauxite | Fe2+Al2(PO4)2(OH)2 · 8H2O |
| 8.DC.25 | Ferristrunzite | Fe3+Fe3+2(PO4)2(OH)3 · 5H2O |
| 8.DC.25 | Strunzite | Mn2+Fe3+2(PO4)2(OH)2 · 6H2O |
| 8.DC.25 | Ferrostrunzite | Fe2+Fe3+2(PO4)2(OH)2 · 6H2O |
| 8.DC.27 | Beraunite | Fe3+6(PO4)4O(OH)4 · 6H2O |
| 8.DC.27 | Tvrdýite | Fe2+Fe3+2Al3(PO4)4(OH)5(H2O)4 · 2H2O |
| 8.DC.27 | Zincoberaunite | ZnFe3+5(PO4)4(OH)5 · 6H2O |
| 8.DC.30 | Maghrebite | MgAl2(AsO4)2(OH)2 · 8H2O |
| 8.DC.30 | Ferrolaueite | Fe2+Fe3+2(PO4)2(OH)2 · 8H2O |
| 8.DC.30 | Ushkovite | MgFe3+2(PO4)2(OH)2 · 8H2O |
| 8.DC.30 | Laueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O |
| 8.DC.30 | Paravauxite | Fe2+Al2(PO4)2(OH)2 · 8H2O |
| 8.DC.30 | Sigloite | Fe3+Al2(PO4)2(OH)3 · 7H2O |
| 8.DC.30 | Nordgauite | MnAl2(PO4)2(F,OH)2 · 5H2O |
| 8.DC.30 | Kayrobertsonite | [MnAl2(PO4)2(OH)2(H2O)4] · 2H2O |
| 8.DC.30 | Kummerite | Mn2+Fe3+Al(PO4)2(OH)2 · 8H2O |
| 8.DC.30 | Mangangordonite | Mn2+Al2(PO4)2(OH)2 · 8H2O |
| 8.DC.30 | Stewartite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O |
| 8.DC.30 | Gordonite | MgAl2(PO4)2(OH)2 · 8H2O |
| 8.DC.30 | Kastningite | (Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2O |
| 8.DC.30 | Pseudolaueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O |
| 8.DC.32 | Kamarizaite | Fe3+3(AsO4)2(OH)3 · 3H2O |
| 8.DC.32 | Tinticite | Fe3+3(PO4)2(OH)3 · 3H2O |
| 8.DC.35 | Vauxite | Fe2+Al2(PO4)2(OH)2 · 6H2O |
| 8.DC.37 | Vantasselite | Al4(PO4)3(OH)3 · 9H2O |
| 8.DC.40 | Cacoxenite | Fe3+24AlO6(PO4)17(OH)12 · 75H2O |
| 8.DC.45 | Souzalite | (Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O |
| 8.DC.45 | Gormanite | (Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O |
| 8.DC.47 | Kingite | Al3(PO4)2F2(OH) · 7H2O |
| 8.DC.50 | Allanpringite | Fe3+3(PO4)2(OH)3 · 5H2O |
| 8.DC.50 | Fluorwavellite | Al3(PO4)2(OH)2F · 5H2O |
| 8.DC.50 | Wavellite | Al3(PO4)2(OH)3 · 5H2O |
| 8.DC.52 | Kribergite | Al5(PO4)3(SO4)(OH)4 · 4H2O |
| 8.DC.55 | Mapimite | Zn2Fe3+3(AsO4)3(OH)4 · 10H2O |
| 8.DC.57 | Ogdensburgite | Ca2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2O |
| 8.DC.60 | Cloncurryite | Cu0.5(VO)0.5Al2(PO4)2F2 · 5H2O |
| 8.DC.60 | Nevadaite | (Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2O |
| 8.DC.62 | Kenngottite | Mn2+3Fe3+4(PO4)4(OH)6(H2O)2 |
| 8.DC.67 | Molinelloite | Cu(H2O)(OH)V4+O(V5+O4) |
| 8.DC.70 | Whitecapsite | H16Fe2+5Fe3+14Sb3+6(AsO4)18O16 · 120H2O |
| 8.DC.75 | Heimite | PbCu2(AsO4)(OH)3 · 2H2O |
| 8.DC.80 | Lednevite | Cu[PO3(OH)] · H2O |
Fluorescence of Metavivianite
Not fluorescent
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.
Internet Links for Metavivianite
mindat.org URL:
https://www.mindat.org/min-2695.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Metavivianite
Reference List:
Ritz, Charles, Essene, Eric J., Peacor, and Donald R. (1974) Metavivianite, Fe3(PO4)2·8H2O, a new mineral. American Mineralogist, 59 (9-10) 896-899
Cabri, Louis J., Fleischer, Michael, Pabst, Adolf (1981) New Mineral Names. American Mineralogist, 66 (9-10) 1099-1103 p.1103
Dormann, Jean-Louis, Gasperin, Madeleine, Poullen, Jean-François (1982) Étude structurale de la séquence d'oxydation de la vivianite Fe3(PO4)2 • 8 H2O. Bulletin de Minéralogie, 105 (2) 147-160 doi:10.3406/bulmi.1982.7597
Sameshima, T., Henderson, G. S., Black, P. M., Rodgers, K. A. (1985) X-ray diffraction studies of vivianite, metavivianite, and barićite. Mineralogical Magazine, 49 (350) 81-85 doi:10.1180/minmag.1985.049.350.11
Rodgers, K. A. (1986) Metavivianite and kerchenite: a review. Mineralogical Magazine, 50 (358) 687-691 doi:10.1180/minmag.1986.050.358.16
Rodgers, K.A.; Henderson, G.S. (1986) The thermochemistry of some iron phosphate minerals: vivianite, metavivianite, baraćite [sic], ludlamite and vivianite/metavivianite admixtures. Thermochimica Acta, 104. 1-12 doi:10.1016/0040-6031(86)85179-6
Frost, Ray L., Weier, Matt, Lyon, William G. (2004) Metavivianite an intermediate mineral phase between vivianite, and ferro/ferristrunzite – a Raman spectroscopic study. Neues Jahrbuch für Mineralogie - Monatshefte, 2004 (5) 228-240 doi:10.1127/0028-3649/2004/2004-0228
Chukanov, N. V., Scholz, R., Aksenov, S. M., Rastsvetaeva, R. K., Pekov, I. V., Belakovskiy, D. I., Krambrock, K., Paniago, R. M., Righi, A., Martins, R. F., Belotti, F. M., Bermanec, V. (2012) Metavivianite, Fe2+Fe3+2(PO4)2(OH)2·6H2O: new data and formula revision. Mineralogical Magazine, 76 (3) 725-741 doi:10.1180/minmag.2012.076.3.20
Localities for Metavivianite
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.
Bolivia | |
| Petrov (n.d.) |
| XRD confirmation by Dr. Anthony Kampf. |
Brazil | |
| Baijot et al. (2012) |
Cameroon | |
| Fransolet et al. (1984) |
Canada | |
| Robinson et al. (1992) |
| 150-152. +2 other references | |
Finland | |
| Lahti (1981) |
| Sandström et al. (2009) | |
Germany | |
| XRD and Wet Chemical by Gerhard Möhn |
| Schnorrer-Köhler (1991) |
| Schnorrer (1993) +1 other reference |
| Wittern (2001) |
Italy | |
| Pratesi (1993) +2 other references |
| Pratesi (1993) +2 other references | |
Japan | |
| S. Matsubara (2000) |
Netherlands | |
| T.G. Nijland |
Portugal | |
| Alves (n.d.) |
| DOI: ... +1 other reference |
Russia | |
| Shen et al. (2021) |
Sweden | |
| Gustafsson et al. (1991) |
UK | |
| Cooper et al. (1990) |
| Alysson Rowan collection |
| Alysson Rowan collection |
Ukraine | |
| Geologiya SSSR (The geology of USSR) +1 other reference |
| Abramov (1989) | |
| |
| Arbuzov V.A. et al. (1967) | |
| Popov S.P. (1938) +1 other reference | |
USA | |
| Denicourt +1 other reference |
| Bob Wilken collection |
| |
| Whitmore et al. (2004) | |
| Luetcke (n.d.) |
| Smith et al. (2000) |
| Ritz et al. (1974) +1 other reference |
| Cordua (1998) |




symbol to view information about a locality.
The
Kerchenskoe deposit, Kerchenskyi iron ore basin, Kerch Peninsula, Crimea, Ukraine