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Parascorodite

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Formula:
FeAsO4 · 2H2O
Colour:
White
Lustre:
Vitreous
Hardness:
1 - 2
Specific Gravity:
3.358 (Calculated)
Crystal System:
Trigonal
Name:
From the Greek "para," for "near," and Scorodite, with which it has a dimorphic relationship.
Dimorph of:
The trigonal dimorph of Scorodite. Compare 'UM1979-03-AsO:Fe' and 'UM1979-04-AsO:Fe'.


Classification of Parascorodite

Approved
Approval Year:
1996
8.CD.15

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

Physical Properties of Parascorodite

Vitreous
Colour:
White
Streak:
Yellowish white
Hardness:
1 - 2 on Mohs scale
Density:
3.358 g/cm3 (Calculated)

Optical Data of Parascorodite

Type:
Uniaxial (+/-)
RI values:
nα = 1.720 nβ = 1.720
Max Birefringence:
δ = 1.720
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of Parascorodite

Formula:
FeAsO4 · 2H2O
IMA Formula:
Fe3+AsO4 · 2H2O

Crystallography of Parascorodite

Crystal System:
Trigonal
Cell Parameters:
a = 8.9232 Å, c = 9.296 Å
Ratio:
a:c = 1 : 1.042
Unit Cell V:
687.71 ų
Z:
6

Type Occurrence of Parascorodite

Synonyms of Parascorodite

Other Language Names for Parascorodite

Related Minerals - Nickel-Strunz Grouping

8.CD.CastellaroiteMn2+3(AsO4)2·4H2O
8.CD.05KolbeckiteScPO4 · 2H2O
8.CD.05MetavarisciteAlPO4 · 2H2O
8.CD.05PhosphosideriteFePO4 · 2H2O
8.CD.05UM2005-02-AsO:AlHPScSiScAsO4 · 2H2O
8.CD.10MansfielditeAlAsO4 · 2H2O
8.CD.10ScoroditeFe3+AsO4 · 2H2O
8.CD.10StrengiteFePO4 · 2H2O
8.CD.10VarisciteAlPO4 · 2H2O
8.CD.10YanomamiteInAsO4 · 2H2O
8.CD.20Ludlamite(Fe,Mn,Mg)3(PO4)2 · 4H2O
8.CD.25SterlinghilliteMn3(AsO4)2 · 4H2O
8.CD.30RollanditeCu3(AsO4)2 · 4H2O

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 Parascorodite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1999): 84: 1439-1444.
Perchiazzi, N., Ondruš, P., Skála, R. (2004): Ab-initio X-ray powder structure determination of parascorodite, Fe(H2O)AsO4. European Journal of Mineralogy 16, 1003-1007.

Internet Links for Parascorodite

mindat.org URL:
https://www.mindat.org/min-7216.html
Please feel free to link to this page.

Localities for Parascorodite

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 (TL)
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Kutná Hora (Kuttenberg)
AmMin 84:1439-1444; Dobešová, B. (2012). Halda Kaňk: hydrogeochemie pórových vod. Masters Thesis MASARYKOVA UNIVERZITA
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
          • Jáchymov (St Joachimsthal)
Lapis 2002(7/8), 62
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (I). Mineralien-Welt 25 (1), 60-75 (in German). [identification announced; no description given yet]
Mineral and/or Locality  
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