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Correianevesite

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Formula:
Fe
2+
 
Mn
2+
2
(PO
 
4
)
 
2
· 3H
 
2
O
System:OrthorhombicColour:Grayish-brown to ...
Hardness:
Member of:Phosphoferrite Group
Name:
Named in honour of Professor José Marques Correia Neves (1929-2011), mineralogist from Portugal, for his detailed studies of Brazilian pegmatites.


Practically a cation-ordered, intermediate member of the Phosphoferrite-Reddingite Series.
Reddingite group (Chukanov et al. 2013)

Classification of Correianevesite

IMA status:Approved 2013
mindat.org URL:http://www.mindat.org/min-43669.html
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Type Occurrence of Correianevesite

Type Locality:Jocão Pegmatite (Cigana Mine; Boavista Cigana), Conselheiro Pena, Doce valley, Minas Gerais, Brazil
General Appearance of Type Material:As grayish-brown to reddish-brown transparent bipyramidal crystals up to 4 mm in size.
Place of Conservation of Type Material:Type material is deposited in the collections of the collections of the Museu de Ciência Tecnica, Escola de Minas, Universidade Federal de Ouro Preto, Praça Tiradentes, Ouro Preto, Brazil, registration number SAA-081B
Geological Setting of type material:A phosphate-rich granite pegmatite.
Associated Minerals at type locality:
TriphyliteLithiophiliteFrondeliteRockbridgeiteEosphorite
VivianiteFairfielditeLeucophosphiteCyrilovitePhosphosiderite

Physical Properties of Correianevesite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Grayish-brown to reddish-brown
Streak:White
Hardness (Mohs):
Cleavage:Poor/Indistinct
on (010).
Fracture:Irregular/Uneven
Comment:Fracture is laminated, uneven across cleavage.
Density (measured):3.25(2) g/cm3
Density (calculated):3.275 g/cm3

Crystallography of Correianevesite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 9.4887(2) Å, b = 10.1149(2) Å, c = 8.7062(2) Å
Ratio:a:b:c = 0.938 : 1 : 0.861
Unit Cell Volume:V 835.6 ų
Z:4
Morphology:Bipyramidal crystals
Comment:Pbna
X-Ray Powder Diffraction:
d-spacingIntensity
5.08(43)
4.314(28)
3.220(100)
3.125(20)
2.756(35)
2.686(25)
2.436(22)
2.233(23)

Optical Data of Correianevesite

Type:Biaxial (+)
RI values: nα = 1.661(5) nβ = 1.673(5) nγ = 1.703(5)
2V:Measured: 70° (10), Calculated: 65.6°
Maximum Birefringence:δ = 0.042

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

Chemical Properties of Correianevesite

Formula:
Fe
2+
 
Mn
2+
2
(PO
 
4
)
 
2
· 3H
 
2
O
Simplified for copy/paste:Fe2+Mn2+2(PO4)2·3H2O
Essential elements:Fe, H, Mn, O, P
All elements listed in formula:Fe, H, Mn, O, P
Analytical Data:Electron microprobe, H2O determined by gas chromatography of ignition products, Fe apportioned between FeO and Fe2O3 based on Mössbauer data. (The Mössbauer spectrum shows the presence of two sites for Fe2+ and one site for Fe3+ occupied in the ratio Fe12+:Fe22+:Fe3+ = 39:55:6)
MnO(29.21)
FeO(21.74)
Fe2O3(1.54)
P2O5(34.59)
H2O(12.6)
total 99.68.
Empirical Formula:
H5.78Mn1.70Fe2+1.25Fe3+0.08P2.015O11

Relationship of Correianevesite to other Species

Member of:Phosphoferrite Group
Other Members of Group:

- +
Garyansellite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
(OH,O) · 1.5H
 
2
O
Kryzhanovskite
(Fe
3+
 
,Mn
2+
 
)
 
3
(PO
 
4
)
 
2
(OH,H
 
2
O)
 
3
Landesite
Mn
2+
3-x
Fe
3+
x
(PO
 
4
)
 
2
(OH)
 
x
· (3-x)H
 
2
O
Phosphoferrite
(Fe
2+
 
,Mn
2+
 
)
 
3
(PO
 
4
)
 
2
· 3H
 
2
O
Reddingite
(Mn
2+
 
,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
· 3H
 
2
O

Other Names for Correianevesite

Synonyms:
IMA2013-007
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 Correianevesite

Reference List:

- +
http://www.mindat.org/mesg-25-290977.html

Chukanov, N.V., Scholz, R.,Zubkova, N.V., Pekov, I.V., Belakovskiy, D.I., Van.V., Lagoeiro, L., Grac¸a, L.M., Krambrock, K., de Oliveira, L.C.A., Menezes Filho, L.A.D. and Pushcharovsky, D.Y. (2013) Correianevesite, IMA 2013-007. CNMNC Newsletter No. 16, August 2013, page 2702; Mineralogical Magazine, 77, 2695-2709.

Chukanov, N.V., Scholz, R., Zubkova, N.V., Pekov, I.V., Belakovskiy, D.I., Van, K.V., Lagoeiro, L., Graça, L.M., Krambrock, K., de Oliveira, L.C.A., Menezes Filho, L.A.D., Sa Carneiro Chaves, M.L., Pushcharovsky, D.Y. (2014): Correianevesite, Fe2+Mn2+2(PO4)2·3H2O, a new reddingite-group mineral from the Cigana mine, Conselheiro Pena, Minas Gerais, Brazil. American Mineralogist, 99, 811-816

Internet Links for Correianevesite

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    Localities for Correianevesite

    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.
    Brazil
     
    • Minas Gerais
      • Doce valley
        • Conselheiro Pena
    http://www.mindat.org/mesg-25-290977.html; Chukanov, N.V., Scholz, R., Zubkova, N.V., Pekov, I.V., Belakovskiy, D.I., Van, K.V., Lagoeiro, L., Graça, L.M., Krambrock, K., de Oliveira, L.C.A., Menezes Filho, L.A.D., Sa Carneiro Chaves, M.L., Pushcharovsky, D.Y. (2014): Correianevesite, Fe2+Mn2+2(PO4)2·3H2O, a new reddingite-group mineral from the Cigana mine, Conselheiro Pena, Minas Gerais, Brazil. American Mineralogist, 99, 811-816
    USA
     
    • Maine
      • Androscoggin Co.
        • Poland
    Moore, P. B., Araki, T., Kampf, A. R. (1980): Nomenclature of the phosphoferrite structure type: refinements of landesite and kryzhanovskite. Mineralogical Magazine, 43, 789-795. King, V. and Foord, E., 1994, 2000, Mineralogy of Maine.
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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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