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Ruifrancoite

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About RuifrancoiteHide

Formula:
Ca2(◻,Mn)2(Fe3+,Mn,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2O
Colour:
reddish brown
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.88
Crystal System:
Monoclinic
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 RuifrancoiteHide

Approved
Approval Year:
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

Physical Properties of RuifrancoiteHide

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

Chemical Properties of RuifrancoiteHide

Formula:
Ca2(◻,Mn)2(Fe3+,Mn,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2O
IMA Formula:
Ca2(◻,Mn)2(Fe3+,Mn,Mg)4Be4(PO4)6(OH)6 · 4H2O

Crystallography of RuifrancoiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 15.911 Å, b = 11.894 Å, c = 6.625 Å
β = 94.5°
Ratio:
a:b:c = 1.338 : 1 : 0.557
Unit Cell V:
1250 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.485 Å(44)
5.943 Å(100)
4.816 Å(65)
3.169 Å(44)
3.117 Å(25)
3.065 Å(22)
2.777 Å(41)
2.643 Å(42)

Type Occurrence of RuifrancoiteHide

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:

Synonyms of RuifrancoiteHide

Relationship of Ruifrancoite to other SpeciesHide

Other Members of this group:
AtencioiteCa2Fe2+3Mg2Be4(PO4)6(OH)4 · 6H2O
FootemineiteCa2Mn2+Mn2+2Mn2+2Be4(PO4)6(OH)4 · 6H2OTric. 1 : P1
GreifensteiniteCa2Fe2+5Be4(PO4)6(OH)4 · 6H2OMon.
GuimarãesiteCa2Be4Zn5(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
OkruschiteCa2Mn2+5Be4(AsO4)6(OH)4·6H2OMon. 2/m : B2/b
RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/m
ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b

Common AssociatesHide

Associated Minerals Based on Photo Data:
21 photos of Ruifrancoite associated with ChildreniteFe2+Al(PO4)(OH)2 · H2O
14 photos of Ruifrancoite associated with QuartzSiO2
6 photos of Ruifrancoite associated with BerylloniteNaBePO4
4 photos of Ruifrancoite associated with Feldspar Group
4 photos of Ruifrancoite associated with Mica Group
4 photos of Ruifrancoite associated with HydroxylherderiteCaBe(PO4)(OH,F)
3 photos of Ruifrancoite associated with Meurigite-KKFe3+8(PO4)6(OH)7 · 6.5H2O
3 photos of Ruifrancoite associated with MuscoviteKAl2(AlSi3O10)(OH)2
2 photos of Ruifrancoite associated with BerliniteAlPO4
1 photo of Ruifrancoite associated with Childrenite-Eosphorite Series

Related Minerals - Nickel-Strunz GroupingHide

8.DA.05BearsiteBe2(AsO4)(OH) · 4H2OMon.
8.DA.05MoraesiteBe2(PO4)(OH) · 4H2OMon.
8.DA.10RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/m
8.DA.10ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
8.DA.10GreifensteiniteCa2Fe2+5Be4(PO4)6(OH)4 · 6H2OMon.
8.DA.10AtencioiteCa2Fe2+3Mg2Be4(PO4)6(OH)4 · 6H2O
8.DA.10GuimarãesiteCa2Be4Zn5(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
8.DA.10FootemineiteCa2Mn2+Mn2+2Mn2+2Be4(PO4)6(OH)4 · 6H2OTric. 1 : P1
8.DA.15UraloliteCa2Be4(PO4)3(OH)3 · 5H2OMon.
8.DA.20WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2OMon.
8.DA.25TiptopiteK2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2OHex.
8.DA.30Veszelyite(Cu,Zn)2Zn(PO4)2 · 2H2OMon. 2/m : P21/b
8.DA.35Kipushite(Cu,Zn)5Zn(PO4)2(OH)6 · H2OMon.
8.DA.35Philipsburgite(Cu,Zn)6(AsO4,PO4)2(OH)6 · H2OMon.
8.DA.40SpenceriteZn4(PO4)2(OH)2 · 3H2OMon. 2/m : P2/b
8.DA.45GlucineCaBe4(PO4)2(OH)4 · 0.5H2O
8.DA.50Ianbruceite[Zn2(OH)(H2O)(AsO4)](H2O)2Mon. 2/m : P21/b

Related Minerals - Dana Grouping (8th Ed.)Hide

42.7.7.1RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/m
42.7.7.3ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b

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 RuifrancoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 RuifrancoiteHide

Localities for RuifrancoiteHide

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.
Brazil (TL)
 
  • Minas Gerais
    • 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.
    • Itinga
      • Taquaral
        • Piauí Valley
Pavel M. Kartashov analysis
 
Mineral and/or Locality  
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