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Metavariscite

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About MetavarisciteHide

Formula:
AlPO4 · 2H2O
Colour:
Light green; colourless in transmitted light.
Lustre:
Sub-Adamantine, Vitreous, Sub-Vitreous
Hardness:
Specific Gravity:
2.51 - 2.54
Crystal System:
Monoclinic
Name:
Named in 1927 by Esper S. Larsen and Waldemar T. Schaller in allusion to its dimorphous relationship to Variscite.
Dimorph of:
Metavariscite Group. The monoclinic dimorph of Variscite.


Classification of MetavarisciteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.CD.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2
40.4.3.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
4 : (AB)5(XO4)2·xH2O
19.7.6

19 : Phosphates
7 : Phosphates of Al alone

Pronounciation of MetavarisciteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of MetavarisciteHide

Sub-Adamantine, Vitreous, Sub-Vitreous
Transparency:
Transparent, Translucent
Colour:
Light green; colourless in transmitted light.
Streak:
White
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {010}.
Density:
2.51 - 2.54 g/cm3 (Measured)    2.53 g/cm3 (Calculated)

Optical Data of MetavarisciteHide

Type:
Biaxial (+)
RI values:
nα = 1.551 nβ = 1.558 nγ = 1.582
2V:
Measured: 55° , Calculated: 58°
Birefringence:
0.031
Max Birefringence:
δ = 0.031
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r < v strong
Pleochroism:
Weak
Comments:
X = colorless, Y = Z = light green

Chemical Properties of MetavarisciteHide

Formula:
AlPO4 · 2H2O
IMA Formula:
Al(PO4) · 2H2O

Crystallography of MetavarisciteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 5.18 Å, b = 9.51 Å, c = 8.45 Å
β = 90.4°
Ratio:
a:b:c = 0.545 : 1 : 0.889
Unit Cell V:
416.25 ų (Calculated from Unit Cell)
Morphology:
Crystals thin to thick tabular {010}, equant or slightly elongated [001] or [100], yielding lath-like forms; long prismatic [100] rare. Form development is markedly pseudo-orthorhombic. Also occurs as loosely coherent granular masses.
Twinning:
On {102}, as contact twins.
Comment:
P21/n

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.325 Å(25)
4.758 Å(100)
4.552 Å(75)
4.227 Å(65)
3.503 Å(60)
2.705 Å(95)
2.290 Å(20)
Comments:
ICDD 33-32

Geological EnvironmentHide

Geological Setting:
Phosphate-rich veins, sedimentary phosphates deposits, guano deposits

Type Occurrence of MetavarisciteHide

Geological Setting of Type Material:
Sedimentary phosphate mineralization along fractures
Associated Minerals at Type Locality:

Other Language Names for MetavarisciteHide

Relationship of Metavariscite to other SpeciesHide

Other Members of this group:
BonacinaiteSc(AsO4)·2H2OMon. 2/m
KolbeckiteScPO4 · 2H2OMon. 2/m
PhosphosideriteFePO4 · 2H2OMon. 2/m
UM2005-02-AsO:AlHPScSiScAsO4 · 2H2O

Common AssociatesHide

FluelliteAl2(PO4)F2(OH) · 7H2O
MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
VarisciteAlPO4 · 2H2O
Associated Minerals Based on Photo Data:
35 photos of Metavariscite associated with FluelliteAl2(PO4)F2(OH) · 7H2O
24 photos of Metavariscite associated with VarisciteAlPO4 · 2H2O
6 photos of Metavariscite associated with QuartzSiO2
1 photo of Metavariscite associated with BariosincositeBa(VO)2(PO4)2 · 4H2O
1 photo of Metavariscite associated with MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
1 photo of Metavariscite associated with
1 photo of Metavariscite associated with MinyuliteKAl2(PO4)2(OH,F) · 4H2O
1 photo of Metavariscite associated with VivianiteFe2+3(PO4)2 · 8H2O
1 photo of Metavariscite associated with CrandalliteCaAl3(PO4)(PO3OH)(OH)6

Related Minerals - Nickel-Strunz GroupingHide

8.CD.CastellaroiteMn2+3(AsO4)2·4H2OMon. 2/m
8.CD.05KolbeckiteScPO4 · 2H2OMon. 2/m
8.CD.05PhosphosideriteFePO4 · 2H2OMon. 2/m
8.CD.05UM2005-02-AsO:AlHPScSiScAsO4 · 2H2O
8.CD.10MansfielditeAlAsO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.10ScoroditeFe3+AsO4 · 2H2OOrth. mmm (2/m 2/m 2/m)
8.CD.10StrengiteFePO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.10VarisciteAlPO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.10YanomamiteInAsO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.15ParascoroditeFeAsO4 · 2H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
8.CD.20LudlamiteFe2+3(PO4)2 · 4H2OMon. 2/m : P21/b
8.CD.25SterlinghilliteMn2+3(AsO4)2 · 3H2OTric. 1 : P1
8.CD.30RollanditeCu3(AsO4)2 · 4H2OOrth.

Related Minerals - Dana Grouping (8th Ed.)Hide

40.4.3.2PhosphosideriteFePO4 · 2H2OMon. 2/m
40.4.3.3KolbeckiteScPO4 · 2H2OMon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.7.1BerliniteAlPO4Trig. 3 2 : P31 2 1
19.7.2AugeliteAl2(PO4)(OH)3Mon. 2/m : B2/m
19.7.3TrolleiteAl4(PO4)3(OH)3Mon. 2/m : B2/b
19.7.4SenegaliteAl2(PO4)(OH)(OH)2 · H2OOrth. mm2
19.7.5VarisciteAlPO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
19.7.7BolivariteAl2(PO4)(OH)3 · 4-5H2OAmor.
19.7.8WavelliteAl3(PO4)2(OH,F)3 · 5H2OOrth. mmm (2/m 2/m 2/m)
19.7.9EvansiteAl3(PO4)(OH)6 · 6H2OAmor.
19.7.10VantasseliteAl4(PO4)3(OH)3 · 9H2OOrth.
19.7.11KingiteAl3(PO4)2F2(OH) · 7H2OTric.
19.7.12VashegyiteAl11(PO4)9(OH)6 · 38H2OOrth. mmm (2/m 2/m 2/m)

Fluorescence of MetavarisciteHide

Not fluorescent in UV

Other InformationHide

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 MetavarisciteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schaller (1912) USGS Bull. 509: 48 (as Variscite).
Schaller (1916) UGS Bull. 610: 69 (as Variscite).
Larsen and Schaller (1925) American Mineralogist: 10: 23-28.
Ulrich (1930) Rozpr. České Ak., Cl. 2, 39, no. 17.
Strunz and Sztrókay (1939) Zentralblatt Mineralien: 272.
McConnell (1940) American Mineralogist: 25: 719.
McConnell (1943) Geological Association of America Bull.: 54: 707.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 767-769.
Acta Crystallographica (1973): B29: 2292-2294.

Internet Links for MetavarisciteHide

Localities for MetavarisciteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Western Australia
    • Meekatharra Shire
      • Milgun Station
Peter Downes, Benjamin Grguric, Margot Willing, Geoff Deacon, Michael Verrall (2018) Variscite and associated phosphate minerals from the Mt Deverell variscite deposits, Milgun Station, Gascoyne region, Western Australia. in abstracts of the 22nd IMA Meeting Melbourne p 319
    • Upper Gascoyne Shire
      • Woodlands station
Nickel, E. H. et al. (2008): The Woodlands variscite-gold occurrence in the north Gascoyne region of Western Australia. Australian Journal of Mineralogy 14, 27-36.
Austria
 
  • Lower Austria
    • Krems-Land District
      • Mühldorf
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
Bolivia
 
  • Potosí
    • Sud Chichas Province
      • Cerro Chorolque
Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009)
Brazil
 
  • Minas Gerais
    • Conselheiro Pena
Lamoso, I. S. M., & Atencio, D. (2017). Cristais zonados de fosfossiderita-metavariscita da Mina do Eduardo, Conselheiro Pena, Minas Gerais, Brazil. Geologia USP. Série Científica, 17(3), 23-27.
Colombia
 
  • San Andrés y Providencia Department
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 769.
Czech Republic
 
  • Karlovy Vary Region
    • Cheb District
Breiter K., Škoda R., Veselovský F.: Neobvyklý P-, Li- a Sn-bohatý pegmatit z Vernéřova u Aše, Česká republika. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 2009, roč. 17, č. 1, s. 41-59.
  • Vysočina Region
    • Pelhřimov District
      • Černovice
Vrtiška L, Sejkora J, Malíková R, Kadlec T (2017) Revize a nové nálezy fosfátů na historickém nalezišti Černovice u Tábora (Česká republika). Bull Mineral Petrolog 25(2)
Germany
 
  • Lower Saxony
    • Goslar
      • Clausthal-Zellerfeld
        • Oberschulenberg
Lapis, 11 (1), 9-18+42
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
Liberia
 
  • Gbarpolu County
    • Bopolu
Sam Rosenblum and S.P. Srivastava (1979) The Bambuta phosphate deposit, Liberia; a reconnaissance report. USGS Bulletin 1480
Poland
 
  • Świętokrzyskie Voivodeship
Wieser T., 1975: THE LUCIN- AND MESSBACH-TYPE VARISCITES FROM WIŚNIÓWKA (ŚWIĘTOKRZYSKIE MTS.). Mineralogia Polonica Vol. 6, No. 2
South Africa
 
  • Limpopo
    • Waterberg District
      • Thabazimbi
        • Glenover carbonatite
Minerals of South Africa
Spain
 
  • Catalonia
    • Barcelona
      • Vallès Occidental
        • Montcada i Reixac
Mineralogistes de Catalunya (1997), VII (1): 34-55
  • Navarre
    • Esteríbar
      • Eugui
Calvo, M. y Viñals, J. (2003). Los minerales de las explotaciones de magnesita de Eugui (Navarra). Revista de Minerales, 2 (4), 6-21.
UK
 
  • England
    • Cornwall
      • Treverbyn
        • Stenalees
Elton, N. J. (1996). Variscite and Metavariscite from Gunheath China Clay Pit, St Austell, Cornwall. Mineralogical Magazine, 60(4), 671-672. http://www.minersoc.org/pages/Archive-MM/Volume_60/60-401-671.pdf
USA
 
  • Arkansas
Howard, 1987. Mineral Species of Arkansas, addenda
  • Idaho
    • Fremont Co.
Ream, Lanny R. 2004. Idaho Minerals, 2nd edition, Revised and Updated
  • Nevada
    • Elko Co.
      • Carlin Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Esmeralda Co.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 769; NBMG Spec. Pub. 31 Minerals of Nevada.
NBMG Spec. Pub. 31 Minerals of Nevada
    • Humboldt Co.
      • Iron Point Mining District
        • Valmy
NBMG Spec. Pub. 31 Minerals of Nevada
    • Mineral Co.
      • Candelaria Mining District
Kampf, A.R., Adams, P.M. and Nash, B.P. (2016) Whiteite-(CaMgMg),CaMg3Al2(PO4)4(OH)2·8H2O, a New Jahnsite-group Mineral from the Northern Belle Mine, Candelaria, Nevada, U.S.A. Canadian Mineralogist. 54: 1513-1523.
    • Nye Co.
      • Hot Creek Range
        • Tybo Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Pershing Co.
      • Humboldt Range
        • Willard Mining District
David M. Lowe Collection. Analyzed by David M. Lowe.
  • Utah
    • Box Elder Co.
      • Pilot Range
        • Lucin Mining District
          • Lucin
            • Utahlite Hill
American Mineralogist (1925) 10, 23-28; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 769.
J. Marty (1995) Minerals of the Utahlite Claim (Edison and Bird Mine), Lucin, Box Elder County, Utah. Microprobe 8-2:4-10
  • Wisconsin
    • Dodge Co.
      • Iron Ridge Mining District (Neda Iron Mining District)
Hawley, J. & A. Bevan (1934) Mineralogy and genesis of the Mayville iron ore of Wisconsin: american Mineralogist: 19 (11): 493- 514.
 
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