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Britholite-(Y)

Big Photo

West Keivy Block, Western Keivy Massif, Kola peninsula, Murmanskaja Oblast', Northern Region, Russia
© Pavel M. Kartashov

Show Britholite-(Y) Photos (6)
Formula:
Ca
 
2
(Y,Ca)
 
3
[(OH,F)|(SiO
 
4
,PO
 
4
)
 
3
]
System:HexagonalColour:Reddish-brown, black.
Lustre:AdamantineHardness:5


Britholite Group

Classification of Britholite-(Y)

IMA status:Approved
Strunz 8th edition ID:8/B.27-50
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:52.4.9.2

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
Hey's CIM Ref.:17.6.16

17 : Silicates Containing other Anions
6 : Silicates with phosphate
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Type Occurrence of Britholite-(Y)

Co-type Localities:Abukuma range (Abukuma massif), Fukushima prefecture, Tohoku region, Honshu Island, Japan
Suishoyama pegmatite (Suishouyama; Suisyoyama; Suishyoyama), Iizaka (Iisaka) Village, Kawamata, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan

Physical Properties of Britholite-(Y)

Lustre:Adamantine
Colour:Reddish-brown, black.
Streak:Pale brown
Hardness (Mohs):5

Crystallography of Britholite-(Y)

Crystal System:Hexagonal

Optical Data of Britholite-(Y)

Type:Uniaxial (-)
RI values: nω = 1.730 - 1.752 nε = 1.728 - 1.750
Maximum Birefringence:δ = 0.002

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

Chemical Properties of Britholite-(Y)

Formula:
Ca
 
2
(Y,Ca)
 
3
[(OH,F)|(SiO
 
4
,PO
 
4
)
 
3
]
Essential elements:H, O, Si, Y
All elements listed in formula:Ca, F, H, O, P, Si, Y

Relationship of Britholite-(Y) 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.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.25Fluorcalciobritholite
(Ca,Ce)
 
5
 (SiO
 
4
,PO
 
4
)
 
3
F
9.AH.25IMA2009-005
Ca
 
2
(Y,Ca)
 
3
[(F,OH)|(SiO
 
4
,PO
 
4
)
 
3
]
Related Minerals - Hey's Index Grouping:

- +
17.6.1Nagelschmidtite
Ca
 
7
[PO
 
4
|SiO
 
4
]
 
2
17.6.2Perhamite
(Ca,Sr)
 
3
Al
 
7.7
Si
 
3
P
 
4
O
 
23.5
(OH)
 
14.1
·8H
 
2
O
17.6.3Viséite
17.6.4Phosinaite
17.6.5Clinophosinaite
Na
 
12
(Ca,Sr)
 
4
(PO
 
4
)
 
4
(Si
 
4
O
 
12
)
17.6.6Karnasurtite-(Ce)
(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)
 
2
O
 
7
(OH)
 
4
·3H
 
2
O
17.6.7Lomonosovite
Na
 
5
Ti
 
2
[O
 
2
|PO
 
4
|Si
 
2
O
 
7
]
17.6.8Bornemanite
Na
 
6
[]BaTi
 
2
Nb(Si
 
2
O
 
7
)
 
2
(PO
 
4
)O
 
2
(OH)F
17.6.9Sobolevite
Na
 
12
Ca(NaCaMn)Ti
 
2
(Si
 
2
O
 
7
)
 
2
(PO
 
4
)
 
4
O
 
3
F
 
3
17.6.10Laplandite-(Ce)
Na
 
4
CeTiPO
 
4
Si
 
7
O
 
18
·5H
 
2
O
17.6.11 Vunonnemite
Na
 
5
TiNb
 
3
Si
 
6
O
 
25
F
 
2
·2Na
 
3
PO
 
4
17.6.12Saryarkite-(Y)
Ca(Y,Th)Al
 
5
(SiO
 
4
)
 
2
(PO
 
4
,SO
 
4
)
 
2
(OH)
 
7
·6H
 
2
O
17.6.13Steenstrupine-(Ce)
Na
 
14
Mn
2+
2
(Fe
3+
 
,Mn
3+
 
)
 
2
Ce
 
6
(Zr,Th)[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
6
|(Si
 
6
O
 
18
)
 
2
]·2H
 
2
O
17.6.14Waylandite
(Bi,Ca)Al
 
3
[(OH)
 
6
|(PO
 
4
,SiO
 
4
)
 
2
]
17.6.15Britholite-(Ce)
Ca
 
2
(Ce,Ca)
 
3
[(OH,F)|(SiO
 
4
,PO
 
4
)
 
3
]
17.6.17Eylettersite
(Th,Pb)Al
 
3
[(OH)
 
6
|(PO
 
4
,SiO
 
4
)
 
2
] ?

Other Names for Britholite-(Y)

Synonyms:
AbukumaliteYttrobritholite
Other Languages:
German:Abukumalit
Abukumalith
Yttrobritholit
Russian:Бритолит-(Y)
Spanish:Abukumalita
Yttrobritholita

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 Britholite-(Y)

Reference List:Zeitschrift für Kristallographie: 206: 233-246.

Oberti, R., Ottolini, L., Della Ventura, G., Parodi, G.C. (2001): On the symmetry and crystal chemistry of britholite: New structural and microanalytical data. American Mineralogist, 86, 1066-1075.

Internet Links for Britholite-(Y)

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    Localities for Britholite-(Y)

    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.
    Finland
     
    • Länsi-Suomen Lääni
      • Kangasala
    		Siivola 1975 Bulletin of the Geological Society of Finland 49
    Japan
     
    • Honshu Island
      • Tohoku region
        • Fukushima prefecture
    		Hata, S. (1938) Abukumalite [britholite-(Y)], a new mineral from pegmatites of Iisaka, Fukushima prefecture. Sci. Pap. Inst. Phys. Chem. Res., Tokyo, 34, 1018-1023.
          • Kawamata
            • Iizaka (Iisaka) Village
    		Sci. Pap. Inst. Phys. Chem. Res., Tokyo, 34, 1018-1023.
    Mongolia
     
    • Hovd Aimag (Khovd Aimag)
      • Altai Mts
        • Khaldzan Buragtag massif
    		Econ Geol (1995) 90:530-547
    Norway
     
    • Nordland
      • Hamarøy
    		 Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
      • Tysfjord
        • Drag
    Tomas Husdal - collection.
    Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
    • Telemark
      • Skien
    		J. Hysingjord (1978, letter); Neumann (1985, p. 124).
    • Vest-Agder
      • Vennesla
    		Griffin et al. (1979); Neumann (1985, p. 125).
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
    		Pavel M. Kartashov data
    Pavel M. Kartashov data
    No reference listed
    South Africa
     
    • Gauteng Province
    Sweden
     
    • Småland
      • Jönköping
        • Gränna
    		No reference listed
    UK
     
    • Scotland
      • North West Highlands (Inverness-shire)
    		Jour. Conf. Abstracts 5: 939 (2000)
    USA
     
    • Colorado
      • Fremont Co.
    		Minerals of Colorado (1997) Eckels, E. B.
      • Gunnison Co.
        • White Earth District (Powderhorn District)
    		"Minerals of Colorado, updated & revised", p. 17, by Eckel, Edwin B., 1997
    • Michigan
      • Marquette Co.
        • Republic
    		"Mines and Minerals of Michigan's Iron Country," Ramon S. Demark. Rocks & Minerals, March 2000.
    • Nevada
      • Humboldt Co.
        • Bottle Creek District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • Texas
      • Llano Co.
        • Kingsland Granite Company quarry (Petrick quarry)
    		Arthur Smith, Frank Roberts, Denise Bicknell (2008) Mineral News, 24, #1, 6-7.
    Mineral and/or Locality
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