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Hundholmenite-(Y)

Big Photo

Stetind, Tysfjord, Nordland, Norway
© Knut Eldjarn

Show Hundholmenite-(Y) Photos (11)
Formula:
(Y,REE,Ca,Na)
 
15
(Al,Fe
3+
 
)(Ca
 
x
As
3+
1-x
)(Si,As
5+
 
)Si
 
6
B
 
3
(O,F)
 
48
System:TrigonalColour:Pale brown
Hardness:5 - 6
Name:After the type locality of Hundholmen, Tysfjord, Nordland County, Norway.
Isostructural with:Okanoganite-(Y), Vicanite-(Ce)


Vicanite Group.

Classification of Hundholmenite-(Y)

IMA status:Approved 2006
Strunz 8th edition ID:8/B.33-
Nickel-Strunz 10th (pending) edition ID:9.AJ.35

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
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Type Occurrence of Hundholmenite-(Y)

Type Locality:Hundholmen, Tysfjord, Nordland, Norway
Year of Discovery:2006
Geological Setting of type material:Granitic pegmatite.
Associated Minerals at type locality:
Fluorite

Physical Properties of Hundholmenite-(Y)

Colour:Pale brown
Hardness (Mohs):5 - 6
Density (calculated):5.206 g/cm3

Crystallography of Hundholmenite-(Y)

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Cell Parameters:a = 10.675(6) Å, c = 27.02(2) Å
Ratio:a:c = 1 : 2.531
Unit Cell Volume:V 2667 ų
Z:3
Morphology:Subhedral crystals up to 1 mm diameter.
X-Ray Powder Diffraction:
d-spacingIntensity
4.38 (33)
3.114 (43)
3.095 (29)
2.972 (100)
2.947 (76)
2.924 (66)
2.681 (36)

Optical Data of Hundholmenite-(Y)

Type:Uniaxial (-)

Chemical Properties of Hundholmenite-(Y)

Formula:
(Y,REE,Ca,Na)
 
15
(Al,Fe
3+
 
)(Ca
 
x
As
3+
1-x
)(Si,As
5+
 
)Si
 
6
B
 
3
(O,F)
 
48
Essential elements:Al, As, B, Ca, O, Si, Y
All elements listed in formula:Al, As, B, Ca, F, Fe, Na, O, Si, Y

Relationship of Hundholmenite-(Y) to other Species

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

- +
9.AJ.05Grandidierite
(Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
3
[O
 
2
|BO
 
3
|SiO
 
4
]
9.AJ.05Ominelite
(Fe
2+
 
,Mg)(Al,Fe
3+
 
)
 
3
[O
 
2
|BO
 
3
|SiO
 
4
]
9.AJ.10Dumortierite
(Al,Fe
3+
 
)
 
7
[O
 
3
|BO
 
3
|(SiO
 
4
)
 
3
]
9.AJ.10Holtite
(Ta,Sb)Al
 
6
[O
 
3
|BO
 
3
|(SiO
 
4
)
 
3
]
9.AJ.10Magnesiodumortierite
(Mg,Ti,[](Al,Mg)
 
2
Al
 
4
Si
 
3
O
 
18-y
(OH)
 
y
B y = 2-3
9.AJ.15Garrelsite
Ba
 
3
NaSi
 
2
B
 
7
O
 
16
(OH)
 
4
9.AJ.20Bakerite
Ca
 
4
B
 
4
[(OH)
 
4
|HBO
 
4
|(SiO
 
4
)
 
3
]
9.AJ.20Datolite
CaB[OH|SiO
 
4
]
9.AJ.20Gadolinite-(Ce)
(Ce,La,Nd,Y)
 
2
Fe
2+
 
Be
 
2
[O|SiO
 
4
]
 
2
9.AJ.20Gadolinite-(Y)
Y
 
2
Fe
2+
 
Be
 
2
[O|SiO
 
4
]
 
2
9.AJ.20Hingganite-(Ce)
(Ce,REE)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Hingganite-(Y)
(Y,REE,Ca)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Hingganite-(Yb)
(Yb,Y,REE)
 
2
□Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Homilite
Ca
 
2
(Fe
2+
 
,Mg)B
 
2
[O|SiO
 
4
]
 
2
9.AJ.20Melanocerite-(Ce)
(Ce,Ca)
 
5
(Si,B)
 
3
O
 
12
(OH,F)·nH
 
2
O
9.AJ.20Minasgeraisite-(Y)
Y
 
2
CaBe
 
2
[O|SiO
 
4
]
 
2
9.AJ.20Calcybeborosilite-(Y)
(Y,Ca)
 
2
(□,Fe
2+
 
)(B,Be)
 
2
[SiO
 
4
]
 
2
(OH,O)
 
2
9.AJ.25Stillwellite-(Ce)
(Ce,La,Ca)BSiO
 
5
9.AJ.30Cappelenite-(Y)
Ba(Y,Ce)
 
6
Si
 
3
B
 
6
O
 
24
F
 
2
9.AJ.35Okanoganite-(Y)
(Na,Ca)
 
3
(Y,Ce)
 
12
Si
 
6
B
 
2
O
 
27
F
 
14
9.AJ.35Vicanite-(Ce)
(Ca,Ce,La,Th)
 
15
As
5+
 
(As
3+
0.5
,Na
 
0.5
)Fe
3+
 
Si
 
6
B
 
4
O
 
40
F
 
7
9.AJ.35Proshchenkoite-(Y)
(Y,REE,Ca,Na,Mn)
 
15
Fe
2+
 
Ca(P,Si)Si
 
6
B
 
3
O
 
34
F
 
14
9.AJ.40Jadarite
LiNaSiB
 
3
O
 
7
(OH)

Other Names for Hundholmenite-(Y)

Synonyms:
IMA2006-005
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 Hundholmenite-(Y)

Reference List:Raade, G., Johnsen, O., Erambert, M., Petersen, O.V. (2007): Hundholmenite-(Y) from Norway – a new mineral species in the vicanite group: descriptive data and crystal structure. Mineralogical Magazine, 71, 179-192.

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    Localities for Hundholmenite-(Y)

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