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Correianevesite

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Prof. Correia Neves
Formula:
Fe2+Mn22+(PO4)2 · 3H2O
System:
Orthorhombic
Colour:
Grayish-brown to ...
Hardness:
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

Approved 2013
mindat.org URL:
http://www.mindat.org/min-43669.html
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First Recorded Occurrence of Correianevesite

General Appearance of First Recorded Material:
As grayish-brown to reddish-brown transparent bipyramidal crystals up to 4 mm in size.
Place of Conservation of First Recorded 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 First Recorded Material:
A phosphate-rich granite pegmatite.

Physical Properties of Correianevesite

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:
3.25(2) g/cm3 (Measured)    3.275 g/cm3 (Calculated)

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 Data:
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°
Max Birefringence:
δ = 0.042
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of Correianevesite

Formula:
Fe2+Mn22+(PO4)2 · 3H2O
Essential elements:
All elements listed in formula:
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

Other Members of Group:
Garyansellite(Mg,Fe)3(PO4)2(OH,O) · 1.5H2O
Kryzhanovskite(Fe3+,Mn2+)3(PO4)2(OH,H2O)3
LandesiteMn2+3-xFex3+(PO4)2(OH)x · (3-x)H2O
Phosphoferrite(Fe2+,Mn2+)3(PO4)2 · 3H2O
Reddingite(Mn2+,Fe2+)3(PO4)2 · 3H2O

Other Names for Correianevesite

Name in Other Languages:

Other Information

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 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

Specimens:
The following Correianevesite specimens are currently listed for sale on minfind.com.

Localities for Correianevesite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Mineral and/or Locality  
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