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Obradovicite-NaNa

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Formula:
[Na
 
2
(H
 
2
O)
 
16
Na(H
 
2
O)
 
6
][Mo
 
8
As
 
2
Fe
3+
3
O
 
33
(OH)
 
4
]
System:Orthorhombic
Member of:Obradovicite Group


First recognized as a potential hypothetical member of the Betpakdalite group (IMA 10-E). Later in 2011, approved by IMA as a valid species.

Classification of Obradovicite-NaNa

IMA status:Approved 2011
mindat.org URL:http://www.mindat.org/min-41949.html
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Type Occurrence of Obradovicite-NaNa

Type Locality:Chuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta Region, Chile
Place of Conservation of Type Material:Natural History Museum of Los Angeles County, catalogue numbers 63313 and 63314

Crystallography of Obradovicite-NaNa

Crystal System:Orthorhombic
Cell Parameters:a = 14.8866(11) Å, b = 11.0880(2) Å, c = 15.0560(3) Å
Ratio:a:b:c = 1.343 : 1 : 1.358
Unit Cell Volume:V 2,485.18 ų (Calculated from Unit Cell)
Comment:Space group: Pnmb
X-Ray Powder Diffraction:
d-spacingIntensity
10.641(43)
8.954(100)
7.487(21)
3.716(15)
2.987(18)
2.906(29)
2.602(16)

Chemical Properties of Obradovicite-NaNa

Formula:
[Na
 
2
(H
 
2
O)
 
16
Na(H
 
2
O)
 
6
][Mo
 
8
As
 
2
Fe
3+
3
O
 
33
(OH)
 
4
]
Simplified for copy/paste:[Na2(H2O)16Na(H2O)6][Mo8As2Fe3+3O33(OH)4]
Essential elements:As, Fe, H, Mo, Na, O
All elements listed in formula:As, Fe, H, Mo, Na, O

Relationship of Obradovicite-NaNa to other Species

Member of:Obradovicite Group
Other Members of Group:

- +
Obradovicite-KCu
[K
 
2
(H
 
2
O)
 
17
Cu(H
 
2
O)
 
6
][Mo
 
8
As
 
2
Fe
3+
3
O
 
34
(OH)
 
3
]
Obradovicite-NaCu
Na
 
2
(H
 
2
O)
 
17
Cu(H
 
2
O)
 
6
][Mo
 
8
As
 
2
Fe
3+
3
O
 
34
(OH)
 
3
]

Other Names for Obradovicite-NaNa

Synonyms:
IMA2011-046
Other Languages:

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 Obradovicite-NaNa

Reference List:

- +
Kampf, A.R., Mills, S.J., Birch, W.D. and Dini, M. (2011) Obradovicite-NaNa, IMA 2011-046. CNMNC Newsletter No. 10,October 2011, page 2559

Internet Links for Obradovicite-NaNa

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  • Localities for Obradovicite-NaNa

    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.
    Chile
     
    • Antofagasta Region
      • El Loa Province
        • Calama
          • Chuquicamata District
    Kampf, A.R., Mills, S.J., Birch, W.D. and Dini, M. (2011) Obradovicite-NaNa, IMA 2011-046. CNMNC Newsletter No. 10,October 2011, page 2559
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