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Rabejacite

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Rabejac, Lodève, Hérault, Languedoc-Roussillon, France
© Stephan Wolfsried

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Formula:
Ca(UO
 
2
)
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 6H
 
2
O
System:OrthorhombicColour:Bright to amber yellow.
Hardness:3
Name:Named after its discovery locality.
This page provides mineralogical data about Rabejacite.

Classification of Rabejacite

IMA status:Approved
Strunz 8th edition ID:6/D.20-90
Nickel-Strunz 10th (pending) edition ID:7.EC.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
C : With medium-sized and large cations
Dana 8th edition ID:31.6.8.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
6 : (AB)5(XO4)2Zq·xH2O
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Type Occurrence of Rabejacite

Type Locality:Rabejac, Lodève, Hérault, Languedoc-Roussillon, France
Place of Conservation of Type Material:Royal Belgian Institute of Narural Sciences, Brussels RC4409, RC4410
Year of Discovery:1993

Occurrences of Rabejacite

Geological Setting:Oxidation zone of deposits containing uraninite.

Physical Properties of Rabejacite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Bright to amber yellow.
Hardness (Mohs):3
Density (calculated):4.31 g/cm3
Comment:Measured > 4.1

Crystallography of Rabejacite

Crystal System:Orthorhombic
Cell Parameters:a = 8.73(1) Å, b = 17.09(2) Å, c = 15.72(2) Å
Ratio:a:b:c = 0.511 : 1 : 0.92
Unit Cell Volume:V 2,345.36 ų (Calculated from Unit Cell)
Z:4
Morphology:Flattened crysyals or acicular. Rosettes, rounded nodules, crusts.

Optical Data of Rabejacite

Type:Biaxial (-)
RI values: nα = 1.617 nβ = 1.710(2) nγ = 1.758(2)
2V:Measured: 68° , Calculated: 68°
Maximum Birefringence:δ = 0.141

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v weak
Pleochroism:Strong
Comments:Y= very pale yellow
Z= sulfur yellow

Chemical Properties of Rabejacite

Formula:
Ca(UO
 
2
)
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 6H
 
2
O
Essential elements:Ca, H, O, S, U
All elements listed in formula:Ca, H, O, S, U

Relationship of Rabejacite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.EC.05Cobaltzippeite
Co
 
2
(UO
 
2
)
 
6
(SO
 
4
)
 
3
(OH)
 
10
·16H
 
2
O
7.EC.05Magnesiozippeite
Mg(UO
 
2
)
 
2
(SO
 
4
)(OH)
 
4
·1.5H
 
2
O
7.EC.05Nickelzippeite
Ni
 
2
(UO
 
2
)
 
6
(SO
 
4
)
 
3
(OH)
 
10
·16H
 
2
O
7.EC.05Natrozippeite
Na
 
4
(UO
 
2
)
 
6
[(OH)
 
10
|(SO
 
4
)
 
3
] · 4H
 
2
O
7.EC.05Zinczippeite
Zn
 
2
(UO
 
2
)
 
6
(SO
 
4
)
 
3
(OH)
 
10
·16H
 
2
O
7.EC.05Zippeite
K
 
4
(UO
 
2
)
 
6
[(OH)
 
10
|(SO
 
4
)
 
3
] · 4H
 
2
O
7.EC.15Marécottite
(H
 
3
O)
 
8
Mg
 
3
(UO
 
2
)
 
4
[O
 
3
|OH|(SO
 
4
)
 
2
]
 
2
 · 10H
 
2
O
7.EC.15IMA2009-008
Y
 
2
[(UO
 
2
)
 
8
O
 
6
(SO
 
4
)
 
4
(OH)
 
2
]·26H
 
2
O
7.EC.20Pseudojohannite
Cu
 
6.5
(UO
 
2
)
 
8
[O
 
8
|(OH)
 
5
|(SO
 
4
)
 
4
] · 25H
 
2
O

Other Names for Rabejacite

Synonyms:
IMA1992-043
Other Languages:
German:Rabejacit
Spanish:Rabejacita

Other Information

Fluorescence in UV light:Pale yellow under SW and LW UV
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 Rabejacite

Reference List:European Journal of Mineralogy (1993): 5: 873-877.

American Mineralogist (1994): 79: 572.

New Minerals (1997), New Minerals 1990-1994.

Sejkora, J., Čejka, J., Ondruš, P. (2000) New data of rabejacite (Jáchymov, the Krusné Hory Mts., Czech Republic). Neues Jahrbuch für Mineralogie Monatshefte: 7: 289-301.

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    Localities for Rabejacite

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