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Metavivianite

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Big Photo

Kerchenskoe deposit, Kerchenskyi (Fe)-ore basin, Kerch peninsula (Kertch peninsula), Crimea peninsula, Crimea Oblast', Ukraine
© Pavel M. Kartashov

Show Metavivianite Photos (6)



Formula:
Fe
2+
3-x
Fe
3+
x
(PO
 
4
)
 
2
(OH)x · (8-x)H
 
2
O
System:TriclinicColour:Dark blue to blue-black; ...
Hardness:1½ - 2
Member of:Symplesite Group
Name:Named by C. Ritz, Eric J. Essene, and Donald R. Peacor in 1974 for its structural relationship to vivianite.
Dimorph of:Vivianite
Isostructural with:Symplesite


Usually occurs as paramorphs after vivianite.
See also kertschenite.

Classification of Metavivianite

IMA status:Approved
Strunz 8th edition ID:7/C.14-20
Nickel-Strunz 10th (pending) edition ID:8.CE.85

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
Dana 8th edition ID:40.3.9.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
Hey's CIM Ref.:19.13.12

19 : Phosphates
13 : Phosphates of Fe alone
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Type Occurrence of Metavivianite

Type Locality:Big Chief Mine, Glendale, Keystone District, Pennington Co., South Dakota, USA
General Appearance of Type Material:Blue black or Green black bladed crystals
Year of Discovery:1974
Geological Setting of type material:Late stage oxidation of vivianite in a granite pegmatite
Associated Minerals at type locality:
SideriteTriphyliteKryzhanovskite

Occurrences of Metavivianite

Geological Setting:Phosphate veins in ironstone
Phosphatic sedimentary units

Physical Properties of Metavivianite

Lustre:Sub-Vitreous, Resinous, Greasy, Dull
Diaphaneity (Transparency):Translucent
Colour:Dark blue to blue-black; Dark green to green-black
Streak:Blue or greenish blue
Hardness (Mohs):1½ - 2
Tenacity:Sectile
Cleavage:Perfect
{110}
Density (calculated):2.69 g/cm3

Crystallography of Metavivianite

Crystal System:Triclinic
Cell Parameters:a = 7.81Å, b = 9.08Å, c = 4.65Å
α = 94.77°, β = 97.15°, γ = 107.37°
Ratio:a:b:c = 0.86 : 1 : 0.512
Unit Cell Volume:V 309.74 ų (Calculated from Unit Cell)
Z:1
Morphology:Bladed crystals, often with irregular acute multiple terminations.
Twinning:{110}
X-Ray Powder Diffraction:
d-spacingIntensity
8.59 (40)
6.71 (100)
4.86 (40)
4.27 (10)
3.97 (30)
3.07 (10)
2.90 (20)
2.77 (30)
Comments:ICDD 29-1137

Optical Data of Metavivianite

Type:Biaxial (+)
RI values: nα = 1.579 nβ = 1.603 nγ = 1.629
2V:Measured: 85° , Calculated: 90°
Birefringence:0.50
Maximum Birefringence:δ = 0.050

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
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

Chemical Properties of Metavivianite

Formula:
Fe
2+
3-x
Fe
3+
x
(PO
 
4
)
 
2
(OH)x · (8-x)H
 
2
O
Essential elements:Fe, H, O, P
All elements listed in formula:Fe, H, O, P

Relationship of Metavivianite to other Species

Member of:Symplesite Group
Other Members of Group:

- +
Metaköttigite
(Zn,Fe,Fe)
 
3
(AsO
 
4
)
 
2
 · 8(H
 
2
O,OH)
Symplesite
Fe
2+
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
Common Associates:
SideriteSideriteAnapaite
Related Minerals - Nickel-Strunz Grouping):

- +
8.CE.05Chudobaite
(Mg,Zn)
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.05Geigerite
Mn
2+
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.10Newberyite
Mg(HPO
 
4
) · 3H
 
2
O
8.CE.15Brassite
Mg(HAsO
 
4
) · 4H
 
2
O
8.CE.20Phosphorrösslerite
Mg(HPO
 
4
) · 7H
 
2
O
8.CE.20Rösslerite
Mg(HAsO
 
4
) · 7H
 
2
O
8.CE.25Metaswitzerite
Mn
 
3
(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.25Switzerite
(Mn,Fe)
 
3
(PO
 
4
)
 
2
 · 7H
 
2
O
8.CE.30Lindackerite
CuCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 8-9H
 
2
O
8.CE.30Ondrušite
CaCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.30Veselovskýite
ZnCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
8.CE.30Pradetite
CoCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
8.CE.30Klajite
MnCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9-10H
 
2
O
8.CE.35Bobierrite
Mg
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Annabergite
Ni
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Arupite
Ni
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Erythrite
Co
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Ferrisymplesite
Fe
3+
3
(AsO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.CE.40Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Köttigite
Zn
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Manganohörnesite
(Mn,Mg)
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Parasymplesite
Fe
2+
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Vivianite
Fe
2+
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Pakhomovskyite
Co
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.45Symplesite
Fe
2+
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.50Cattiite
Mg
 
3
(PO
 
4
)
 
2
 · 22H
 
2
O
8.CE.55Koninckite
Fe
3+
 
PO
 
4
 · 3H
 
2
O
8.CE.60Kaňkite
FeAsO
 
4
 · 3.5H
 
2
O
8.CE.65Steigerite
Al(VO
 
4
) · 3H
 
2
O
8.CE.70Metaschoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 6H
 
2
O
8.CE.70Schoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 8H
 
2
O
8.CE.75Malhmoodite
FeZr(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.75Zigrasite
MgZr(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.75Unnamed (Ca-analogue of Zigrasite)
CaZr[PO
 
4
]
 
2
 · 4H
 
2
O
8.CE.80Santabarbaraite
Fe
3+
3
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.CE.85Metaköttigite
(Zn,Fe,Fe)
 
3
(AsO
 
4
)
 
2
 · 8(H
 
2
O,OH)
Related Minerals - Hey's Index Grouping:

- +
19.13.1Barbosalite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
19.13.2Strengite
FePO
 
4
 · 2H
 
2
O
19.13.3Phosphosiderite
FePO
 
4
 · 2H
 
2
O
19.13.4Dufrénite
Ca
 
0.5
Fe
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
19.13.5Giniite
Fe
2+
 
Fe
3+
4
(PO
 
4
)
 
3
(OH)
 
5
 · 2H
 
2
O
19.13.6Whitmoreite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
19.13.7Tinticite
Fe
3+
5.34
(PO
 
4
)
 
3.62
(VO
 
4
)
 
0.38
(OH)
 
4
 · 6.7H
 
2
O
19.13.8Ferristrunzite
Fe
3+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
19.13.9Ferrostrunzite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 6H
 
2
O
19.13.10Beraunite
Fe
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
5
 · 4H
 
2
O
19.13.11Vivianite
Fe
2+
3
(PO
 
4
)
 
2
 · 8H
 
2
O

Other Names for Metavivianite

Synonyms:
IMA1973-049Kerchenite-alpha
Other Languages:
German:Metavivianit
Russian:Метавивианит
Spanish:Metavivianita

Other Information

Fluorescence in UV light:Not fluorescent
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Metavivianite

Reference List:

- +
Ritz, C., E.J. Essene, and D.R. Peacor (1974): Metavivianite, Fe3(PO4)2•8H2O,
a new mineral. Amer. Mineral., 59, 896–899.

Dormann, J.-L., M. Gaspérin, and J.-F. Poullen (1980): Étude structurale de la séquence d'oxydation de la vivianite Fe3(PO4)2 •8H2O. Bull. Minéral., 105, 147–160 (in French with English abs.).

American Mineralogist (1981): 66: 1103.

Sameshima, T., G.S. Henderson, P.M. Black, and K.A. Rodgers, 1985, X-ray diffraction studies of vivianite, metavivianite, and baricite. Mineralogical Magazine, 49, 81–85.

Rodgers, K.A., 1986, Metavivianite and kerchenite: a review. Mineral. Mag., 50,
687–691.

American Mineralogist (1988): 73: 667.

Internet Links for Metavivianite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Metavivianite details from Handbook of Mineralogy (PDF)
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    • Localities for Metavivianite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    Bolivia
     
    • Oruro Department
      • Dalence Province
        • Santa Fé Mining District
    		Collection of Alfredo Petrov.
    • Potosí Department
      • Cornelio Saavedra Province
        • Machacamarca District (Colavi District)
          • Huallani (Huayllani)
            • Infiernillos mine
    		XRD confirmation by Dr. Anthony Kampf.
    Cameroon
     
    • Adamaoua Region
      • Adamaoua Plateau (Adamawa Plateau)
    		FRANSOLET, A.-M., OUSTRIERE, P., FONTAN, F. & PILLARD, F. (1984) La mantiennéite, une nouvelle espèce minérale du gisement de vivianite d'Anloua, Cameroun. Bulletin de Minéralogie 107, 737-744.
    Canada
     
    • Yukon Territory
      • Dawson Mining District
    		MinRec 23:4-47
    [Mineralogical Record Vol 23 No.4 pp31]
    Finland
     
    • Western and Inner Finland Region
      • Orivesi
        • Eräjärvi area
    		Sandström, F. & Lahti, S.I. (2009): Viitaniemipegmatiten i Eräjärvi, Orivesi, Finland. Litiofilen 26 (1): 11-38
    Germany
     
    • Lower Saxony
      • Harz
        • Lautenthal
    		No reference listed
    • Schleswig-Holstein
      • Bredstedt
        • Joldelund
    		A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
    Japan
     
    • Honshu Island
      • Kinki region
        • Hyogo prefecture
          • Kobe city
    		S. Matsubara (2000) Vivianite nodules and secondary phosphates in Pliocene-Pleistocene clay deposits from Hime-shima, Oita Prefecture and Kobe, Hyogo Prefecture, Western Japan. Memoirs of the National Science Museum (Tokyo), 33.
    Netherlands
     
    • Noord-Brabant
    		T.G. Nijland, J.C. Zwaan, D. Visser, J. Leloux - De mineralen van Nederland - 2007
    Sweden
     
    • Södermanland
    		Gustafsson, Lars & Otter, Bertil (1991): Mineralförekomster i Stockholmstrakten.Del 2. STEIN 18(4),4-12
    Ukraine
     
    • Crimea Oblast'
      • Crimea peninsula
    		Ritz, C., E.J. Essene, and D.R. Peacor (1974): Metavivianite, Fe3(PO4)2•8H2O, a new mineral. Amer. Mineral., 59, 896–899.; Geologiya SSSR (The geology of USSR) (1969) - Nedra (Moscou), 1969, vol. VIII, 575 p.
          • Kerchenskyi (Fe)-ore basin
            • Kerchenskoe deposit
    		not refered listen
    Arbuzov V.A. et al. (1967) Kerch Iron-Ore Basin (Kerchenskii Zhelezorydny Bassein)/ - Moscow:Nedra. - 576 h/ (Rus.)
    Chukanov Nikita V. (2005) Minerals of the Kerch iron0ore basin in Eastern Crimea. - Mineralogical Almanac, vol.8, 109 p.; Popov S.P. (1938) Mineralogy of the Crimea (Mineralogiya Kryma). Moscow-Leningrad:izd-vo AN SSSR, 352 p. (Rus.) Chukanov Nikita V. (2005). Minerals of the Kerch iron-ore basin in Eastern Crimea. Mineralogical Almanac, vol.8, 109 p. (Eng.)
    USA
     
    • Florida
      • Polk Co.
        • Homeland
    		Denicourt, R., Micromounters of New England program, NE meeting program, May 1984
    • New Hampshire
      • Cheshire Co.
        • Walpole
    		Bob Wilken collection
      • Grafton Co.
        • Groton
    		No reference listed
    Whitmore & Lawrence, 2004. The Pegmatite Mines Known As Palermo, p. 96.
    • South Dakota
      • Custer Co.
        • Custer District
          • Custer
    		R&M 75:3 pp 156-169
      • Pennington Co.
        • Keystone District
          • Glendale
    		Rocks & Minerals: 60: 116.
    • Wisconsin
      • Rusk Co.
        • Ladysmith
    		Rocks & Min. Vol. 73 (1998)
    Mineral and/or Locality
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