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Fe2+ Fe3+2(AsO4)2(OH)2·8H2O
Pale to yellowish green
Specific Gravity:
2.934 (Calculated)
Crystal System:
The Arsenate-analogue of ferrolaueite.
Related to stewartite and bendadaite.

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Classification of CésarferreiraiteHide

Approval Year:

Physical Properties of CésarferreiraiteHide

Pale to yellowish green
Pale to yellowish green
{010} {100}
2.934 g/cm3 (Calculated)

Optical Data of CésarferreiraiteHide

Biaxial (+)
RI min=1.747 max=1.754

Chemical Properties of CésarferreiraiteHide

Fe2+ Fe3+2(AsO4)2(OH)2·8H2O
IMA Formula:
Fe2+Fe3+2(AsO4)2(OH)2 · 8H2O

Crystallography of CésarferreiraiteHide

Crystal System:
Class (H-M):
1 - Pinacoidal
Space Group:
Cell Parameters:
a = 5.383(2) Å, b = 6.878(2) Å, c = 10.364(3) Å
α = 96.43(4)°, β = 102.29(2)°, γ = 109.17(3)°
a:b:c = 0.783 : 1 : 1.507
Unit Cell V:
347.19 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
From Type Description.

Type Occurrence of CésarferreiraiteHide

General Appearance of Type Material:
Single crystals, up to 10 μm long with a thickness of about 1-2 μm, are elongated along [001] and flattened on (100).
Place of Conservation of Type Material:
Type material is deposited in the collections of the Museu de Ciência e Técnica da Escola de Minas, Universidade Federal de Ouro Preto, Praça Tiradentes, Ouro Preto, Brazil, registration number SAA-011
Geological Setting of Type Material:
Associated Minerals at Type Locality:

Synonyms of CésarferreiraiteHide

Other Language Names for CésarferreiraiteHide

Relationship of Césarferreiraite to other SpeciesHide

Other Members of this group:
MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2OTric. 1 : P1

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 CésarferreiraiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Scholz, R., Chukanov, N.V., Menezes Filho, L.A.D., Atencio, D., Lagoeiro, L., Belotti, F.M., Chaves, M.L.S.C., Romano, A.W., Branda˜o, P.R., Belakovskiy, D.I. and Pekov, I. (2013) Césarferreiraite, IMA 2012-099. CNMNC Newsletter No. 16, August 2013, page 2700; Mineralogical Magazine, 77, 2695-2709.
Scholz, R., Chukanov, N. V., Menezes Filho, L. A., Atencio, D., Lagoeiro, L., Belotti, F. M., ... & Pekov, I. (2014). Césarferreiraite, Fe2+ Fe23+ (AsO4) 2 (OH) 2· 8H2O, from Eduardo mine, Conselheiro Pena, Minas Gerais, Brazil: Second arsenate in the laueite mineral group. American Mineralogist, 99(4), 607-611.

Internet Links for CésarferreiraiteHide

Localities for CésarferreiraiteHide

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.
  • Minas Gerais
    • Conselheiro Pena
Bermanec, V., Scholz, R., Markovic, F., Zigovecki-Gobac, Z., and Chaves, M. L. S. C., 2011, Mineralogy of the Boa Vista pegmatite, Galiléia, Minas Gerais, Brazil: Contributions to the 5th International Symposium on Granitic Pegmatites, Galliski et al., eds., Assoc. Geológica Argentina, Serie D, Publicación Especial 14, p. 33-35.
Scholz, R., Chukanov, N. V., Menezes Filho, L. A., Atencio, D., Lagoeiro, L., Belotti, F. M., ... & Pekov, I. (2014). Césarferreiraite, Fe2+ Fe23+ (AsO4) 2 (OH) 2· 8H2O, from Eduardo mine, Conselheiro Pena, Minas Gerais, Brazil: Second arsenate in the laueite mineral group. American Mineralogist, 99(4), 607-611.
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