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Ruifrancoite

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Formula:
Ca22(Fe3+,Mn2+,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2O
System:
Monoclinic
Colour:
reddish brown
Hardness:
Name:
Named in honour of Professor Rui Ribeiro Franco (9 June 1916 - 20 February 2008), in recognition of his outstanding contributions to Brazilian mineralogy and geology.

Classification of Ruifrancoite

Approved 2006
8.DA.10

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
A : With small (and occasionally larger) cations
42.7.7.4

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
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Type Occurrence of Ruifrancoite

General Appearance of Type Material:
needles or laths 1 to 2 microns thick, and up to 100 microns long in fan-shaped boyryoids
Place of Conservation of Type Material:
Museu de Geosciencias, Instituto de Geosciencas, Universidade de Sao Paulo, Brazil (cat.no. DR587). Cotype deposited in the Mineralogical Collection , Technische Universitat Bergakademie Freiberg, Germany (catalog no. 81420)
Associated Minerals at Type Locality:

Physical Properties of Ruifrancoite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
reddish brown
Streak:
orange-brown
Hardness (Mohs):
Hardness Data:
Estimated
Density:
2.88 g/cm3 (Measured)    2.859 g/cm3 (Calculated)

Crystallography of Ruifrancoite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 15.911Å, b = 11.894Å, c = 6.625Å
β = 94.5°
Ratio:
a:b:c = 1.338 : 1 : 0.557
Unit Cell Volume:
V 1250 ų
Z:
2
X-Ray Powder Diffraction Data:
d-spacingIntensity
9.485 (44)
5.943 (100)
4.816 (65)
3.169 (44)
3.117 (25)
3.065 (22)
2.777 (41)
2.643 (42)

Chemical Properties of Ruifrancoite

Formula:
Ca22(Fe3+,Mn2+,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2O
Essential elements:
All elements listed in formula:

Relationship of Ruifrancoite to other Species

Other Members of Group:
AtencioiteCa2Fe32+Mg2Be4(PO4)6(OH)4 · 6H2O
FootemineiteCa2Mn2+Mn22+Mn22+Be4(PO4)6(OH)4 · 6H2O
GreifensteiniteCa2Fe52+Be4(PO4)6(OH)4 · 6H2O
GuimarãesiteCa2(Zn,Mg,Fe2+)5Be4(PO4)6(OH)4 · 6H2O
OkruschiteCa2Mn52+Be4(AsO4)6(OH)4·6H2O
RoscheriteCa2Mn52+Be4(PO4)6(OH)4 · 6H2O
ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2O
8.DA.05BearsiteBe2(AsO4)(OH) · 4H2O
8.DA.05MoraesiteBe2(PO4)(OH) · 4H2O
8.DA.10RoscheriteCa2Mn52+Be4(PO4)6(OH)4 · 6H2O
8.DA.10ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2O
8.DA.10GreifensteiniteCa2Fe52+Be4(PO4)6(OH)4 · 6H2O
8.DA.10AtencioiteCa2Fe32+Mg2Be4(PO4)6(OH)4 · 6H2O
8.DA.10GuimarãesiteCa2(Zn,Mg,Fe2+)5Be4(PO4)6(OH)4 · 6H2O
8.DA.10FootemineiteCa2Mn2+Mn22+Mn22+Be4(PO4)6(OH)4 · 6H2O
8.DA.15UraloliteCa2Be4(PO4)3(OH)3 · 5H2O
8.DA.20WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2O
8.DA.25TiptopiteK2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2O
8.DA.30Veszelyite(Cu,Zn)2Zn(PO4)2 · 2H2O
8.DA.35Kipushite(Cu,Zn)5Zn(PO4)2(OH)6 · H2O
8.DA.35Philipsburgite(Cu,Zn)6(AsO4,PO4)2(OH)6 · H2O
8.DA.40SpenceriteZn4(PO4)2(OH)2 · 3H2O
8.DA.45GlucineCaBe4(PO4)2(OH)4 · 0.5H2O
8.DA.50Ianbruceite[Zn2(OH)(H2O)(AsO4)](H2O)2

Other Names for Ruifrancoite

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 Ruifrancoite

Reference List:
D. Atencio, et al (2007): Ruifrancoite, a new Fe3+-dominant monoclinic member of the roscherite group from Galileia, Minas Gerais, Brazil. Canadian Mineralogist, 45, 1263-1273.

Internet Links for Ruifrancoite

Localities for Ruifrancoite

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
      • Galiléia
        • Sapucaia do Norte
Atencio,K. et al (2007): Ruifrancoite, a new Fe3+-dominant monoclinic member of the roscherite group from Galileia, Minas Gerais, Brazil. Canadian Mineralogist. 45, 1263-1273.
    • Jequitinhonha valley
      • Itinga
        • Taquaral
          • Piauí Valley
Pavel M. Kartashov analysis
Mineral and/or Locality  
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