Parascorodite
A valid IMA mineral species
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About Parascorodite
Formula:
FeAsO4 · 2H2O
Colour:
White
Lustre:
Vitreous
Hardness:
1 - 2
Specific Gravity:
3.358 (Calculated)
Crystal System:
Hexagonal
Name:
From the Greek "para," for "near," and Scorodite, with which it has a dimorphic relationship.
Dimorph of:
Unique Identifiers
Mindat ID:
7216
Long-form identifier:
mindat:1:1:7216:4
IMA Classification of Parascorodite
Classification of Parascorodite
8.CD.15
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2
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 for Standard |
|---|---|---|
| Pscd | 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 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 = 1.72 nβ = 1.72
Surface Relief:
Moderate
Chemistry of Parascorodite
Mindat Formula:
FeAsO4 · 2H2O
Element Weights:
Elements listed:
Crystallography of Parascorodite
Crystal System:
Hexagonal
Class (H-M):
6/mmm(6/m2/m2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mcm
Setting:
P63/mcm
Cell Parameters:
a = 8.9232 Å, c = 9.296 Å
Ratio:
a:c = 1 : 1.042
Unit Cell V:
687.71 ų
Z:
6
Morphology:
Tabular to prismatic hexagonal, tiny (to 1 μm) crystals; may be fan-shaped, in crudely hemispherical aggregates.
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) |
|---|---|---|---|---|---|---|---|
| 0007087 | Parascorodite | Perchiazzi N, Ondrus P, Skala R (2004) Ab initio X-ray powder structure determination of parascorodite, Fe(H2O)2AsO4 European Journal of Mineralogy 16 1003-1007 | 2004 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.973 Å | (61) |
| 4.184 Å | (44) |
| 4.076 Å | (100) |
| 3.053 Å | (67) |
| 2.806 Å | (68) |
| 2.661 Å | (59) |
| 2.520 Å | (54) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 55 : Anthropogenic mine minerals |
Type Occurrence of Parascorodite
General Appearance of Type Material:
Earthy white to white-yellow aggregates.
Place of Conservation of Type Material:
National Museum, Prague, Czech Republic, number P1p 25/98.
Geological Setting of Type Material:
From heavily weathered dumps of polymetallic ore rich in arsenic but thought to have formed in the deposit pre-mining due to natural weathering in the supergene zone.
Associated Minerals at Type Locality:
Synonyms of Parascorodite
Other Language Names for Parascorodite
Dutch:Parascorodiet
German:Parascorodit
Paraskorodit
Paraskorodit
Russian:Параскородит
Spanish:Parascorodita
Paraskorodita
Paraskorodita
Related Minerals - Strunz-mindat Grouping
| 8.CD. | Castellaroite | Mn2+3(AsO4)2 · 4H2O |
| 8.CD. | Sergeysmirnovite | MgZn2(PO4)2 · 4H2O |
| 8.CD.05 | Phosphosiderite | FePO4 · 2H2O |
| 8.CD.05 | Metavariscite | AlPO4 · 2H2O |
| 8.CD.05 | Bonacinaite | Sc(AsO4) · 2H2O |
| 8.CD.05 | Kolbeckite | ScPO4 · 2H2O |
| 8.CD.10 | Yanomamite | InAsO4 · 2H2O |
| 8.CD.10 | Mansfieldite | AlAsO4 · 2H2O |
| 8.CD.10 | Scorodite | Fe3+AsO4 · 2H2O |
| 8.CD.10 | Variscite | AlPO4 · 2H2O |
| 8.CD.10 | Strengite | FePO4 · 2H2O |
| 8.CD.20 | Ludlamite | Fe2+3(PO4)2 · 4H2O |
| 8.CD.25 | Sterlinghillite | Mn2+3(AsO4)2 · 3H2O |
| 8.CD.30 | Rollandite | Cu3(AsO4)2 · 4H2O |
| 8.CD.35 | Liversidgeite | Zn6(PO4)4 · 7H2O |
| 8.CD.40 | Thorasphite | Th2H(PO4,AsO4)3 · 6H2O |
Other Information
Notes:
Dissolves slowly in 10% HCl, but no reaction with water
Under hydrothermal conditions (distilled water, sealed quartz glass container, temperature of 155 °C) lasting for a period of two months, parascorodite re-crystallizes to scorodite.
Under hydrothermal conditions (distilled water, sealed quartz glass container, temperature of 155 °C) lasting for a period of two months, parascorodite re-crystallizes to scorodite.
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 Parascorodite
mindat.org URL:
https://www.mindat.org/min-7216.html
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References for Parascorodite
Reference List:
Ondrus, Petr, Skala, Roman, Viti, Cecilia, Veselovsky, Frantisek, Novak, Frantisek, Jansa, Jiri (1999) Parascorodite, FeAsO4.2H2O; a new mineral from Kank near Kutna Hora, Czech Republic. American Mineralogist, 84 (9) 1439-1444 doi:10.2138/am-1999-0923
Perchiazzi, Natale, Ondru, Petr, Skála, Roman (2004) Ab initio X-ray powder structure determination of parascorodite, Fe(H2O)2AsO4. European Journal of Mineralogy, 16 (6) 1003-1007 doi:10.1127/0935-1221/2004/0016-1003
Localities for Parascorodite
Showing 6 localities.
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.
Czech Republic (TL) | |
| AmMin 84:1439-1444 +1 other reference |
| Hloušek et al. (2002) |
Greece | |
| Rieck et al. (2018) |
| no description given yet] +1 other reference | |
Romania | |
| Januszewska et al. (9th Meeting of the Mineralogical Society of Poland 28th Meeting of the Petrology group of the Mineralogical Society of Poland, October 19-22, 2023, Bielawa, Poland) |
Serbia | |
| Jelić et al. (2024) |
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Kaňk, Kutná Hora, Kutná Hora District, Central Bohemian Region, Czech Republic