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About ChadwickiteHide

James Chadwick (1891-1974)
Crystal System:
Named after Sir James Chadwick (1891-1974), English physicist, Cavendish Laboratory, University of Cambridge, U.K., Nobel Prize winner in 1935 for his discovery of the neutron.
This page provides mineralogical data about Chadwickite.

Classification of ChadwickiteHide


4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
A : Arsenites, antimonites, bismuthites; without additional anions, without H2O

Physical Properties of ChadwickiteHide


Optical Data of ChadwickiteHide

Uniaxial (-)
RI values:
nω = 1.840 nε = 1.750
Max Birefringence:
δ = 0.090
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of ChadwickiteHide

IMA Formula:

Crystallography of ChadwickiteHide

Crystal System:
Cell Parameters:
a = 11.00(1) Å, c = 15.96(2) Å
a:c = 1 : 1.451
Unit Cell V:
1,931.16 ų (Calculated from Unit Cell)
From indexing of PXRD pattern. Crystal class and space group unknown.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
5.58 (80)
4.95 (100)
4.40 (60)
3.33 (80)
3.03 (60)
2.91 (50)

Type Occurrence of ChadwickiteHide

General Appearance of Type Material:
yellow, earthy and scaly crusts in which single grains are partly transparent, up to 20 µm across, and rarely exhibit a rectangular or square form of the tabular face {001}.
Place of Conservation of Type Material:
Staatliches Museum für Naturkunde, Stuttgart
Institut für Mineralogie und Kristallchemie der Universität Stuttgart

Synonyms of ChadwickiteHide

Other Language Names for ChadwickiteHide


Related Minerals - Nickel-Strunz GroupingHide

4.JA.05LeiteiteZn(As2O4)Mon. 2/m : P21/b
4.JA.15KaribibiteFe3+3(As3+O2)4(As3+2O5)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
4.JA.20SchafarzikiteFe2+Sb3+2O4Tet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.20TrippkeiteCu2+As3+2O4Tet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.25ApuaniteFe2+Fe3+4Sb3+4O12STet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.35SchneiderhöhniteFe2+Fe3+3As3+5O13Tric. 1 : P1
4.JA.45LudlockitePbFe3+4As3+10O22Tric. 1 : P1
4.JA.50PaulmooreitePb2[As2O5]Mon. 2/m : P21/b

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 ChadwickiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Walenta, K. (1998) Chadwickite, a new uranyl arsenite from Wittichen in the Black Forest. Aufschluss: 49: 253-257 [in German with English abstract].
Jambor, J.L., Pertsev, N.N., and Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 1195-1198.

Internet Links for ChadwickiteHide

Localities for ChadwickiteHide

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.
  • Baden-Württemberg
    • Black Forest
      • Baden-Baden
        • Müllenbach U deposit
Specimen in Chuck Adan collection. Analyzed by Dr. Wilfried Bär, a chemist from Bad Elster, Germany on an old sample collected in 1978 and obtained from Carsten Slotta; Chuck Adan collection. Analyzed by Dr. Wilfried Bär, a chemist from Bad Elster, Germany on a sample collected in 1978. Obtained from Carsten Slotta 2018.
      • Schenkenzell
        • Wittichen
          • Böckelsbach valley
Jambor, J.L., Pertsev, N.N., and Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 1195-1198.; Markl, G. and Slotta, C. (2011) Die Uranmineralien des Lagerstättenreviers Wittichen im mittleren Schwarzwald. Lapis 36(3): 25-37; 54 (in German).
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion District Mines
          • Paleokamariza area
            • Paleokamariza Mines
Michalis Fitros collection (EDS analysis, SXRD planned); Branko Rieck collection (EDS and SXRD analyses)
Mineral and/or Locality  
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