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Ruifrancoite

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Formula:
Ca
 
2
 
2
(Fe
3+
 
,Mn
2+
 
,Mg)
 
4
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
(OH,H
 
2
O)
 
2
· 4H
 
2
O
System:MonoclinicColour:reddish brown
Hardness:
Member of:Roscherite Group
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

IMA status:Approved 2006
Strunz 8th edition ID:7/D.01-52
Strunz 9th edition ID:8.DA.10
Nickel-Strunz 10th (pending) edition ID:8.DA.10

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

Type Locality:Sapucaia Mine (Proberil mine), Sapucaia do Norte, Galiléia, Doce valley, Minas Gerais, Brazil
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:
MuscoviteMeurigite-KCyriloviteAlbite

Physical Properties of Ruifrancoite

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

Crystallography of Ruifrancoite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
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:
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:
Ca
 
2
 
2
(Fe
3+
 
,Mn
2+
 
,Mg)
 
4
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
(OH,H
 
2
O)
 
2
· 4H
 
2
O
Simplified for copy/paste:Ca22(Fe3+,Mn2+,Mg)4Be4(PO4)6(OH)4(OH,H2O)2·4H2O
Essential elements:Be, Ca, Fe, H, O, P
All elements listed in formula:Be, Ca, Fe, H, Mg, Mn, O, P

Relationship of Ruifrancoite to other Species

Member of:Roscherite Group
Other Members of Group:

- +
Atencioite
Ca
 
2
Fe
2+
3
Mg
 
2
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Footemineite
Ca
 
2
Mn
2+
 
Mn
2+
2
Mn
2+
2
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Greifensteinite
Ca
 
2
Fe
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Guimarãesite
Ca
 
2
(Zn,Mg,Fe
2+
 
)
 
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Roscherite
Ca
 
2
Mn
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Zanazziite
Ca
 
2
Mg
 
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.DA.05Bearsite
Be
 
2
(AsO
 
4
)(OH) · 4H
 
2
O
8.DA.05Moraesite
Be
 
2
(PO
 
4
)(OH) · 4H
 
2
O
8.DA.10Roscherite
Ca
 
2
Mn
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.10Zanazziite
Ca
 
2
Mg
 
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.10Greifensteinite
Ca
 
2
Fe
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.10Atencioite
Ca
 
2
Fe
2+
3
Mg
 
2
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.10Guimarãesite
Ca
 
2
(Zn,Mg,Fe
2+
 
)
 
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.10Footemineite
Ca
 
2
Mn
2+
 
Mn
2+
2
Mn
2+
2
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.15Uralolite
Ca
 
2
Be
 
4
(PO
 
4
)
 
3
(OH)
 
3
· 5H
 
2
O
8.DA.20Weinebeneite
CaBe
 
3
(PO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
8.DA.25Tiptopite
K
 
2
(Na,Ca)
 
2
Li
 
3
Be
 
6
(PO
 
4
)
 
6
(OH)
 
2
· H
 
2
O
8.DA.30Veszelyite
(Cu,Zn)
 
2
Zn(PO
 
4
)
 
2
· 2H
 
2
O
8.DA.35Kipushite
(Cu,Zn)
 
5
Zn(PO
 
4
)
 
2
(OH)
 
6
· H
 
2
O
8.DA.35Philipsburgite
(Cu,Zn)
 
6
(AsO
 
4
,PO
 
4
)
 
2
(OH)
 
6
· H
 
2
O
8.DA.40Spencerite
Zn
 
4
(PO
 
4
)
 
2
(OH)
 
2
· 3H
 
2
O
8.DA.45Glucine
CaBe
 
4
(PO
 
4
)
 
2
(OH)
 
4
· 0.5H
 
2
O
8.DA.50Ianbruceite
[Zn
 
2
(OH)(H
 
2
O)(AsO
 
4
)](H
 
2
O)
 
2

Other Names for Ruifrancoite

Synonyms:
IMA2005-061a
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 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

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  • Raman and XRD data at RRUFF project
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  • Localities for Ruifrancoite

    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
        • 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
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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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