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Fluorcalciobritholite

Big Photo

In den Dellen quarries, Niedermendig, Mendig, Laach lake volcanic complex, Eifel Mts, Rhineland-Palatinate, Germany
© C.H.M.-Schäfer

Show Fluorcalciobritholite Photos (2)
Formula:
(Ca,Ce)
 
5
 (SiO
 
4
,PO
 
4
)
 
3
F
System:HexagonalColour:Pinkish to brown
Hardness:5½


Britholite Group

Classification of Fluorcalciobritholite

IMA status:Approved 2006
Strunz 8th edition ID:8/B.27-45
Strunz 9th edition ID:9.AH.25
Nickel-Strunz 10th (pending) edition ID:9.AH.25

9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
Dana 8th edition ID:52.4.12.7

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
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Type Occurrence of Fluorcalciobritholite

Type Locality:Tuliok River head, East slope, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
General Appearance of Type Material:grains and minute elongated crystals
Year of Discovery:1977
Associated Minerals at type locality:
SodaliteOrthoclaseNepheline

Occurrences of Fluorcalciobritholite

Geological Setting:in veinlets in a alkaline complex

Physical Properties of Fluorcalciobritholite

Diaphaneity (Transparency):Transparent, Translucent
Colour:Pinkish to brown
Streak:white
Hardness (Mohs):5½
Density (measured):4.2 g/cm3

Crystallography of Fluorcalciobritholite

Crystal System:Hexagonal
Class (H-M):6/m - Dipyramidal
Space Group:P63/m
Cell Parameters:a = 9.58(7) Å, c = 6.985(4) Å
Ratio:a:c = 1 : 0.729
Unit Cell Volume:V 555.2 ų
Z:2
Morphology:long-prismatic hexagonal crystals up to 0.5 x 10 mm
X-Ray Powder Diffraction:
d-spacingIntensity
3.51 (45)
3.15 (70)
2.85 (100)
2.78 (60)
1.965 (25)
1.931 (20)
1.236 (25)

Optical Data of Fluorcalciobritholite

Type:Uniaxial (-)
RI values: nω = 1.735() nε = 1.730(5)
Maximum Birefringence:δ = 0.005

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High

Chemical Properties of Fluorcalciobritholite

Formula:
(Ca,Ce)
 
5
 (SiO
 
4
,PO
 
4
)
 
3
F
Idealised Formula:
Ca
 
3
Ce
 
2
 (SiO
 
4
)
 
2
(PO
 
4
)F
All elements listed in formula:Ca, Ce, F, O, P, Si

Relationship of Fluorcalciobritholite to other Species

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

- +
9.AH.05Iimoriite-(Y)
Y
 
2
[CO
 
3
|SiO
 
4
]
9.AH.10Tundrite-(Ce)
Na
 
2
Ce
 
2
TiO
 
2
(SiO
 
4
)(CO
 
3
)
 
2
9.AH.10Tundrite-(Nd)
Na
 
3
(Nd,La)
 
4
(Ti,Nb)
 
2
(SiO
 
4
)
 
2
(CO
 
3
)
 
3
O
 
4
(OH)·2H
 
2
O
9.AH.15Paraspurrite
Ca
 
5
[CO
 
3
|(SiO
 
4
)
 
2
]
9.AH.15Spurrite
Ca
 
5
[CO
 
3
|(SiO
 
4
)
 
2
]
9.AH.20Ternesite
Ca
 
5
[SO
 
4
|(SiO
 
4
)
 
2
]
9.AH.25Britholite-(Ce)
Ca
 
2
(Ce,Ca)
 
3
[(OH,F)|(SiO
 
4
,PO
 
4
)
 
3
]
9.AH.25Britholite-(Y)
Ca
 
2
(Y,Ca)
 
3
[(OH,F)|(SiO
 
4
,PO
 
4
)
 
3
]
9.AH.25Ellestadite-(Cl)
Ca
 
10
[Cl
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
9.AH.25Fluorbritholite-(Ce)
Ca
 
2
(Ce,Ca)
 
3
[(F,OH)|(SiO
 
4
,PO
 
4
)
 
3
]
9.AH.25Ellestadite-(F)
Ca
 
10
[(F,Cl,OH)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
9.AH.25Ellestadite-(OH)
Ca
 
10
[(OH,Cl,F)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
9.AH.25Mattheddleite
Pb
 
5
(Si
 
1.5
S
 
1.5
)O
 
12
(Cl,OH)
9.AH.25Tritomite-(Ce)
(Ce,La,Y,Th)
 
5
(Si,B)
 
3
(O,OH,F)
 
13
9.AH.25Tritomite-(Y)
(Y,Ca,La,Fe)
 
5
(Si,B,Al)
 
3
(O,OH,F)
 
13
9.AH.25IMA2009-005
Ca
 
2
(Y,Ca)
 
3
[(F,OH)|(SiO
 
4
,PO
 
4
)
 
3
]

Other Names for Fluorcalciobritholite

Synonyms:
IMA2006-010
Other Languages:
German:Fluorcalciobritholith

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 Fluorcalciobritholite

Reference List:Igor V. Pekov ; Marco Pasero ; Asiya N. Yaskovskaya ; Nikita V. Chukanov ; Dmitry Yu. Pushcharovsky ; Stefano Merlino ; Natalia V. Zubkova ; Natalia N. Kononkova ; Yury P. Men'shikov ; Aleksandr E. Zadov: "Fluorcalciobritholite, (Ca,REE)5[(Si,P)O4]3F, a new mineral: description and crystal chemistry": European Journal of Mineralogy: 19: 95-103. [abstract: Am. Min. 93,252 (2008)]

Internet Links for Fluorcalciobritholite

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    Localities for Fluorcalciobritholite

    Hide Locality List
    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.
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Laach lake volcanic complex
          • Mendig
            • Niedermendig
    		Christof Schäfer
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Kukisvumchorr Mt
              • East slope
    		EJM 19, 95-103(2007)
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the 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 hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 31st Oct 2009 22:33:35