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Chadwickite

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Formula:
(UO
 
2
)[HAsO
 
3
]
System:TetragonalLustre:Earthy
Hardness:2
Name: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 Chadwickite

IMA status:Approved
Strunz 8th edition ID:4/J.05-10
Nickel-Strunz 10th (pending) edition ID:4.JA.60

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
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Type Occurrence of Chadwickite

Type Locality:Sophia Mine, Böckelsbach valley, Wittichen, Schenkenzell, Black Forest, Baden-Württemberg, Germany

Physical Properties of Chadwickite

Lustre:Earthy
Hardness (Mohs):2

Crystallography of Chadwickite

Crystal System:Tetragonal

Optical Data of Chadwickite

Type:Uniaxial (-)
RI values: nω = 1.840 nε = 1.750
Maximum Birefringence:δ = 0.090

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Chadwickite

Formula:
(UO
 
2
)[HAsO
 
3
]
Simplified for copy/paste:(UO2)[HAsO3]
Essential elements:As, H, O, U
All elements listed in formula:As, H, O, U

Relationship of Chadwickite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JA.05Leiteite
Zn(As
 
2
O
 
4
)
4.JA.10Reinerite
Zn
 
3
(AsO
 
3
)
 
2
4.JA.15Karibibite
Fe
 
2
As
 
4
O
 
9
4.JA.20Kusachiite
CuBi
 
2
O
 
4
4.JA.20Schafarzikite
Fe
2+
 
Sb
3+
2
O
 
4
4.JA.20Trippkeite
Cu[As
 
2
O
 
4
]
4.JA.25Apuanite
Fe
2+
 
Fe
3+
4
Sb
3+
4
O
 
12
S
4.JA.30Versiliaite
Fe
 
2
Fe
 
4
Sb
 
6
O
 
16
S
4.JA.35Schneiderhöhnite
Fe
2+
 
Fe
3+
3
[As
 
5
O
 
13
]
4.JA.40Zimbabweite
(Na,K)
 
2
PbAs
 
4
(Ta,Nb,Ti)
 
4
O
 
18
4.JA.45Ludlockite
PbFe
3+
4
As
3+
10
O
 
22
4.JA.50Paulmooreite
Pb
 
2
[As
 
2
O
 
5
]
4.JA.55Stibivanite
Sb
 
2
VO
 
5

Other Names for Chadwickite

Synonyms:
IMA1997-005
Other Languages:
German:Chadwickit
Spanish:Chadwickita

Other Information

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 Chadwickite

Reference List:

- +
Aufschluss: 49: 253-257.

Internet Links for Chadwickite

Search Engines:
  • Look for Chadwickite on Google
  • Look for Chadwickite images on Google
  • External Links:
  • Look for Chadwickite on Webmineral
  • Look for Chadwickite on Athena Mineralogy
  • Look for Chadwickite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Chadwickite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Buy from David K Joyce minerals
  • Buy rare minerals from Excalibur Minerals
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  • Chadwickite specimens for sale - minfind.com
  • Wilensky Fine Minerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
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  • Buy RARE Minerals from Rocks of Africa
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  • SpiriferMinerals.com - high quality low prices
  • Fine minerals from bisbeeborn.com
  • Rare and Unusual minerals at Mineralogical Research Company
  • Localities for Chadwickite

    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.
    (TL) indicates type locality. ? 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.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Schenkenzell
          • Wittichen
            • Böckelsbach valley
    American Mineralogist, Volume 84, pages 1195–1198, 1999; Markl, G. & Slotta, C. (2011): Die Uranmineralien des Lagerstättenreviers Wittichen im mittleren Schwarzwald. Lapis 36 (3), 25-37; 54 (in German).
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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