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Ruifrancoite

Big Photo

Sapucaia Mine, Sapucaia do Norte, Galiléia, Doce valley, Minas Gerais, Southeast Region, Brazil
© Leon Hupperichs

Show Ruifrancoite Photos (25)
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:4½
Name:Professor Rui Ribeiro Franco (1916- ), in recognition of his outstanding contributions to Brazilian mineralogy and geology


Roscherite Group.

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, Sapucaia do Norte, Galiléia, Doce valley, Minas Gerais, Southeast Region, 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):4½
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)

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
All elements listed in formula:Be, Ca, Fe, H, Mg, Mn, O, P

Relationship of Ruifrancoite to other Species

Member of Group:
Roscherite Group:
Related Minerals - Nickel-Strunz Grouping):

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

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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    Localities for Ruifrancoite

    (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
     
    • Southeast Region
      • Minas Gerais
        • Doce valley
          • Galiléia
            • Sapucaia do Norte
    		IMA website
        • Jequitinhonha valley
          • Itinga
            • Taquaral
              • Piauí Valley
    		Jordi Fabre
    Mineral and/or Locality
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