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Hellandite-(Yb)

Formula:
(Ca,Y)
 
4
(Yb,Y)
 
2
(Al,Fe
3+
 
,Ti
4+
 
)[(Be,Li)
 
2
(O,F,OH)
 
2
|B
 
4
Si
 
4
O
 
22
]
Colour:brownish red to brownish ...Lustre:


Hellandite Group.

First classified as Hellandite-(Yb) (but not submitted to IMA), then Hellandite-(Y). Modern and more complete analyses are needed to correctly name the samples.

Originally reported from Kalstad-Lindvikskollen pegmatite, Kragerø, Telemark, Norway.

Classification of Hellandite-(Yb)

IMA status:Not Approved
Strunz 8th edition ID:8/F.36-08

8 : Silicates
F : Inosilicates (chain and band) double chains [Si2O6]4-
36 : Caysichite-(Y) - Tadzhikite-(Ce) series
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Physical Properties of Hellandite-(Yb)

Colour:brownish red to brownish black

Chemical Properties of Hellandite-(Yb)

Formula:
(Ca,Y)
 
4
(Yb,Y)
 
2
(Al,Fe
3+
 
,Ti
4+
 
)[(Be,Li)
 
2
(O,F,OH)
 
2
|B
 
4
Si
 
4
O
 
22
]
Essential elements:Al, B, Be, Ca, O, Si, Yb
All elements listed in formula:Al, B, Be, Ca, F, Fe, H, Li, O, Si, Ti, Y, Yb

Relationship of Hellandite-(Yb) to other Species

Related Minerals - Strunz Grouping):

- +
8/F.36-02Grumantite
Na[Si
 
2
O
 
4
(OH)]·H
 
2
O
8/F.36-05Caysichite-(Y)
Ca
 
2
Y
 
2
Si
 
4
O
 
10
(CO
 
3
)
 
3
·4H
 
2
O
8/F.36-09Hellandite-(Ce)
(Ca,Ce)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4
8/F.36-10Hellandite-(Y)
(Ca,Y)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4
8/F.36-20Tadzhikite-(Ce)
(Ca,Ce)
 
4
(Ce,Y)
 
2
(Ti
4+
 
,Fe
3+
 
,Al)[B
 
4
Si
 
4
O
 
22
](OH)
 
2
8/F.36-30Ashcroftine-(Y)
K
 
5
Na
 
5
(Y,Ca)
 
12
Si
 
28
O
 
70
(OH)
 
2
(CO
 
3
)
 
8
·8H
 
2
O

Other Names for Hellandite-(Yb)

Other Languages:
Russian:Гелландит-(Yb)

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.

Internet Links for Hellandite-(Yb)

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    Localities for Hellandite-(Yb)

    (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.
    Norway
     
    • Telemark
      • Kragerø
    		American Mineralogist, 84, 913–921, 1999; American Mineralogist, 87, 745–752, 2002
    Mineral and/or Locality
    Google
     
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