Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (6 online) Mindat Auctions

Scorodite

Big Photo

Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
© Steve Rust

Show Scorodite Photos (324)
Formula:
Fe
3+
 
AsO
 
4
·2H
 
2
O
System:OrthorhombicColour:Green, blue-green, grey, ...
Lustre:Sub-Adamantine, Vitreous, ResinousHardness:3½ - 4
Name:From the Greek σκορόδιου = "Scorodion" Garlic-like, due to the smell when heated.
Dimorph of:Parascorodite


Variscite Group; Mansfieldite-Scorodite Series; Scorodite-Yanomamite Series. The orthorhombic dimorph of Parascorodite. The ferric iron analogue of Manfieldsite and Yanomamite.

Typically a secondary mineral resulting from the oxidation of arsenopyrite or other arsenic-bearing species.

Classification of Scorodite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/C.09-80
Nickel-Strunz 10th (pending) edition ID:8.CD.10

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2
Dana 8th edition ID:40.4.1.3

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
4 : (AB)5(XO4)2·xH2O
Hey's CIM Ref.:20.9.2

20 : Arsenates (also arsenates with phosphate, but without other anions)
9 : Arsenates of Fe
mindat.org URL:http://www.mindat.org/min-3595.html
Please feel free to link to this page.

Type Occurrence of Scorodite

Type Locality:Stamm Asser Mine, Graul, Schwarzenberg District, Erzgebirge, Saxony, Germany
Year of Discovery:1818

Occurrences of Scorodite

Geological Setting:In the secondary oxidation zone of iron bearing arsenides, in gossans; also observed in a primary hydrothermal deposit (Saubach).

Physical Properties of Scorodite

Lustre:Sub-Adamantine, Vitreous, Resinous
Diaphaneity (Transparency):Semitransparent
Colour:Green, blue-green, grey, grayish-green, blue, yellow-brown, nearly colourless, violet; colourless to faintly greenish or greenish brown in transmitted light.
Comment:Earthy material: light green to light grayish or brownish green.
Streak:Greenish-White
Hardness (Mohs):3½ - 4
Cleavage:Imperfect/Fair
Imperfect on {201}, traces on {001}{100}
Fracture:Sub-Conchoidal
Density (measured):3.27 g/cm3
Density (calculated):3.276 g/cm3

Crystallography of Scorodite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 8.937Å, b = 10.278Å, c = 9.996Å
Ratio:a:b:c = 0.87 : 1 : 0.973
Unit Cell Volume:V 918.2 ų
Z:8
Morphology:Crystals commonly pyrimidal {111}, tabular {001}, or prismatic [010]. Commonly aggregated into crusts or irregular groups. Also occurs massive, crystalline or porous and sinterlike, earthy.
Crystal Atlas:
Image Loading
Click on an icon to view
Scorodite no.3 - Goldschmidt (1913-1926)
Scorodite no.8 - Goldschmidt (1913-1926)

About Crystal Atlas

You may need to scroll this box using your mouse to view the full instructions.

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. You need Java to see these. You can download Java for free - click here to download Java

The 3d models and java code are kindly provided by www.smorf.nl. You can control the movement of the models by holding down the left mouse-button over the 3d model and moving your mouse. Keyboard controls are:

: default positions
t/T: decrease/increase transparency x/X: next/previous texture
b/B: next/previous background w: toggle wireframe
s: toggle sticks m: toggle miller indices
k: toggle crystallographic axes =/-: zoom in/out
r: stop/start rotation 1/2/3


Note: You will not be able to switch between different crystal models using the Opera 8.5x web browser due to a bug in Opera - you need to use either Firefox or Internet Explorer 6/7 or Opera 9.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Scorodite

Type:Biaxial (+)
RI values: nα = 1.741 - 1.784 nβ = 1.744 - 1.805 nγ = 1.768 - 1.820
2V:Measured: 40° to 75°, Calculated: 46° to 80°
Maximum Birefringence:δ = 0.027 - 0.036

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:relatively strong r > v
Pleochroism:Weak
Comments:blue-violet to blue-green

Chemical Properties of Scorodite

Formula:
Fe
3+
 
AsO
 
4
·2H
 
2
O
Essential elements:As, Fe, H, O
All elements listed in formula:As, Fe, H, O
Common Impurities:Al

Relationship of Scorodite to other Species

Series:Forms a series with Yanomamite (see here)
Forms a series with Mansfieldite (see here)
Related to:
  • Variscite Group
    • Common Associates:
    VivianitePharmacosideriteLimoniteGypsumClay
    ChalcedonyBeudantite
    Related Minerals - Nickel-Strunz Grouping):
    8.CD.05Kolbeckite
    ScPO
     
    4
    		·2H
     
    2
    		O
    8.CD.05Metavariscite
    AlPO
     
    4
    		·2H
     
    2
    		O
    8.CD.05Phosphosiderite
    FePO
     
    4
    		·2H
     
    2
    		O
    8.CD.10Mansfieldite
    AlAsO
     
    4
    		·2H
     
    2
    		O
    8.CD.10Strengite
    FePO
     
    4
    		·2H
     
    2
    		O
    8.CD.10Variscite
    AlPO
     
    4
    		·2H
     
    2
    		O
    8.CD.10Yanomamite
    InAsO
     
    4
    		·2H
     
    2
    		O
    8.CD.15Parascorodite
    Fe
    3+
     
    		AsO
     
    4
    		·2H
     
    2
    		O
    8.CD.20Ludlamite
    (Fe,Mn,Mg)
     
    3
    		(PO
     
    4
    		)
     
    2
    		·4H
     
    2
    		O
    8.CD.25Sterlinghillite
    Mn
     
    3
    		(AsO
     
    4
    		)
     
    2
    		·4H
     
    2
    		O
    8.CD.30Rollandite
    Cu
     
    3
    		(AsO
     
    4
    		)
     
    2
    		·4H
     
    2
    		O
    Related Minerals - Hey's Index Grouping:
    20.9.1Angelellite
    Fe
    3+
    4
    		[O
     
    3
    		|(AsO
     
    4
    		)
     
    2
    		]
    20.9.3Kaňkite
    FeAsO
     
    4
    		·3.5H
     
    2
    		O
    20.9.4Ferrisymplesite
    Fe
    3+
    3
    		[(OH)
     
    3
    		|(AsO
     
    4
    		)
     
    2
    		] · 5H
     
    2
    		O
    20.9.5Kaatialaite
    Fe(H
     
    2
    		AsO
     
    4
    		)
     
    3
    		·5H
     
    2
    		O
    20.9.6Symplesite
    Fe
    2+
    3
    		(AsO
     
    4
    		)
     
    2
    		·8H
     
    2
    		O
    20.9.7Parasymplesite
    Fe
    2+
    3
    		(AsO
     
    4
    		)
     
    2
    		·8H
     
    2
    		O
    20.9.8Natropharmacosiderite
    (Na,K)Fe
    3+
    4
    		[(OH)
     
    4
    		|(AsO
     
    4
    		)
     
    3
    		] · 6-7H
     
    2
    		O
    20.9.9Pharmacosiderite
    KFe
    3+
    4
    		[(OH)
     
    4
    		|(AsO
     
    4
    		)
     
    3
    		] · 6-7H
     
    2
    		O
    20.9.10Kolfanite
    Ca
     
    2
    		Fe
    3+
    2
    		[O
     
    2
    		|(AsO
     
    4
    		)
     
    3
    		] · 2H
     
    2
    		O
    20.9.11Arseniosiderite
    Ca
     
    2
    		Fe
    3+
    3
    		[O
     
    2
    		|(AsO
     
    4
    		)
     
    3
    		] · 3H
     
    2
    		O
    20.9.12Yukonite
    Ca
     
    3
    		Fe
    3+
     
    		[(OH)
     
    3
    		|(AsO
     
    4
    		)
     
    2
    		] · 5H
     
    2
    		O
    20.9.13Dussertite
    BaFe
    3+
    3
    		[(OH)
     
    5
    		|(AsO
     
    4
    		)
     
    2
    		]
    20.9.14Liskeardite
    (Al,Fe
    3+
     
    		)
     
    3
    		[(OH)
     
    6
    		|AsO
     
    4
    		] · 5H
     
    2
    		O
    20.9.15Mapimite
    Zn
     
    2
    		Fe
    3+
    3
    		[(OH)
     
    4
    		|(AsO
     
    4
    		)
     
    3
    		] · 10H
     
    2
    		O
    20.9.16Ogdensburgite
    Ca
     
    2
    		Fe
    3+
    4
    		(Zn,Mn
    2+
     
    		)[(OH)
     
    3
    		|(AsO
     
    4
    		)
     
    2
    		]
     
    2
    		 · 6H
     
    2
    		O
    20.9.17Walentaite
    H(Ca,Mn
    2+
     
    		,Fe
    2+
     
    		)Fe
    3+
    3
    		[(AsO
     
    4
    		,PO
     
    4
    		)]
     
    4
    		 · 7H
     
    2
    		O

    Other Names for Scorodite

    Synonyms:
    Arsenic SinterCupreous Arsenate of IronCupromartial ArsenateLoaisiteMartial Arsenate of Copper
    French names:
    Cuivre arseniaté ferrifèreNéoctèse
    German names:
    ArseniksinterEisensinterKobalt-SkoroditScoroditSkorodit
    Russian names:
    Скородит
    Spanish names:
    LoaisitaScorodita
    Swedish names:
    Jogynaite
    Varieties:
    Aluminian ScoroditePhosphoscorodite

    Other Information

    Other Information:Soluble in acids; decomposed in strong alkalies.

    Alters to Limonite.
    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 Scorodite

    Reference List:Bournon (1801) Royal Society of London, Philosophical Transactions: 191 (as Cupromartial Arsenate).

    Haüy, R.J. (1809) Tableau comparative des résultants de la cristallographie et de l’analyse chimique relativement à la classification des minéraux. Paris: 91 (as Cuivre arseniaté ferrifére).

    Breithaupt, A. (1818): Skorodit.- C.A.S. Hoffmann´s Handbuch der Mineralogie, Vol. 4.2. Freiberg, Verl. Craz & Gerlach, p. 182-185 (as Scorodit).

    Beudant, F.S. (1832), Trailé élémentaire de Minéralogie, second edition, 2 volumes: 2: 605 (as Néoctèse).

    Des Cloizeaux (1844) Annales de chimie et de physique, Paris: 10: 402.

    Hermann (1845) Bull. Soc. Imp. Nat. Moscou: 1: 254 (as Arseniksinter, Eisensinter).

    Lippmann (1857) von Hornberg, Zool. min. Ver. Regensberg: 11: 172 (as Kobalt-scorodit).

    Koksharov (1870) Min. Russ.: 6: 320.

    Nordenskiöld in: Koksharov (1873) Bull. ac. sc. St. Petersberg: 19: 571 (as Jogynaite ?).

    Hague (1887) American Journal of Science: 34: 171.

    Goldschmidt, V. (1890) Index der Krystallformen der Mineralien. 3 volumes: 3: 135.

    Codazzi (1908) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 183 (as Loaisite).

    Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 132.

    Goldschmidt, V. (1922) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 8: : 58.

    Chirva (1925) Bull. ac. sc. U.R.S.S.: [6]: 19: 731.

    Piazza (1927) Reale accademia nazionale dei Lincei, Rome: [6]: 6: 70.

    Foshag, Berman, and Doggett (1930) American Mineralogist: 15: 390.

    Ito and Shiga (1932) Mineralogical Magazine: 23: 130.

    Hintze, Carl (1933) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [4A]: 1289.

    Foshag (1937) American Mineralogist: 22: 482.

    Kokkoros (1938) Prakt. Ac Athènes: 13: 337.

    Strunz (1938) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 99: 513.

    McConnell (1940) American Mineralogist: 25: 719.

    Rossetti (1941) Periodico de Mineralogia-Roma: 12: 433.

    Allen and Fahey (1948) American Mineralogist: 33: 122.

    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.: 763-767.

    Mineralogical Magazine (1966): 35: 776-777.

    Hawthorne, F. C. (1976): The hydrogen positions in scorodite. Acta Crystallographica, B32, 2891-2892.

    Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 531.

    Internet Links for Scorodite

    Search Engines:
  • Look for Scorodite on Google
  • Look for Scorodite images on Google
    • External Links:
  • Look for Scorodite on Webmineral
  • Look for Scorodite on Athena Mineralogy
  • Look for Scorodite on Wikipedia
  • Look for Scorodite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Scorodite in the Natural History Museum (London) online catalogue
  • Scorodite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Lapis Mineral Magazin
  • Wilensky Fine Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Buy fine minerals and gemstones from Pala International
  • Top quality minerals from Kristalle of California
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Buy from David K Joyce minerals
  • Wendel Minerals - Auktion & Shop
  • The Arkenstone - Fine Minerals
  • Search for Scorodite on minvision.com
  • High-end worldwide specimens & outstanding customer service
  • Search for Scorodite at Thames Valley Minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Scorodite

    Show Locality List (605 Items)
    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.
    These maps work faster with Firefox!
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.