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Fluorthalénite-(Y)

Formula:
Y
 
3
Si
 
3
O
 
10
F
System:MonoclinicLustre:Adamantine
Hardness:4 - 5
Name:Named as the F-analog of thalenite-(Y).


The fluorine analogue of Thalenite-(Y).

Classification of Fluorthalénite-(Y)

IMA status:Approved
Strunz 8th edition ID:8/C.33-05
Nickel-Strunz 10th (pending) edition ID:9.BJ.20

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
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Type Occurrence of Fluorthalénite-(Y)

Type Locality:Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Physical Properties of Fluorthalénite-(Y)

Lustre:Adamantine
Hardness (Mohs):4 - 5

Crystallography of Fluorthalénite-(Y)

Crystal System:Monoclinic

Optical Data of Fluorthalénite-(Y)

Type:Biaxial (-)
RI values: nα = 1.719 nβ = 1.739 nγ = 1.748
2V:Measured: 73° , Calculated: 66°
Maximum Birefringence:δ = 0.029

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

Chemical Properties of Fluorthalénite-(Y)

Formula:
Y
 
3
Si
 
3
O
 
10
F
Essential elements:F, O, Si, Y
All elements listed in formula:F, O, Si, Y

Relationship of Fluorthalénite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):
9.BJ.05Orientite
Ca
 
2
MnMn
 
2
Si
 
3
O
 
10
(OH)
 
4
9.BJ.10Rosenhahnite
HCa
 
3
[Si
 
3
O
 
9
(OH)]
9.BJ.15Trabzonite
Ca
 
4
Si
 
3
O
 
10
·2H
 
2
O
9.BJ.20Thalénite-(Y)
Y
 
3
Si
 
3
O
 
10
(OH)
9.BJ.25Tiragalloite
Mn
 
4
AsSi
 
3
O
 
12
(OH)
9.BJ.30Medaite
(Mn,Ca)
 
6
(V,As)Si
 
5
O
 
18
OH
9.BJ.35Ruizite
Ca
 
2
Mn
3+
2
[(OH)
 
2
|H
 
2
Si
 
4
O
 
13
] · 2H
 
2
O
9.BJ.40Ardennite-(As)
Mn
2+
4
[(Al,Mg)
 
6
][(OH)
 
6
|(AsO
 
4
,VO
 
4
)|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]
9.BJ.40Ardennite-(V)
Mn
2+
4
[Al
 
4
(Mg,Al,Fe
3+
 
,Mn
3+
 
)
 
2
][(OH)
 
6
|(VO
 
4
,SiO
 
4
)|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]
9.BJ.45Kilchoanite
Ca
 
3
Si
 
2
O
 
7
9.BJ.50Kornerupine
Mg
 
3
Al
 
6
(Si,Al,B)
 
5
O
 
21
(OH)
9.BJ.50Prismatine
([ ],Fe,Mg)(Mg,Al,Fe)
 
5
Al
 
4
Si
 
2
(Si,Al)
 
2
(B,Si,Al)(O,OH,F)
 
22
9.BJ.55Zunyite
Al
 
13
Si
 
5
O
 
20
(OH,F)
 
18
Cl
9.BJ.60Hubeite
Ca
 
2
Mn
2+
 
Fe
3+
 
[HSi
 
4
O
 
13
] · 2H
 
2
O
9.BJ.65Cassagnaite
(Ca,Mn
2+
 
)
 
4
(Fe
3+
 
,Mn
3+
 
,Al)
 
4
(V
3+
 
,Mg,Al)
 
2
[(O,OH)
 
4
|(OH)
 
4
|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]

Other Names for Fluorthalénite-(Y)

Synonyms:
IMA1994-022
Russian names:
Фторталенит-(Y)

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 Fluorthalénite-(Y)

Reference List:Mineralogical Record: 29: 470.

Doklady Akademii Nauk: 354(1): 77-78.

Yakubovich, O. V.; Voloshin, A. V.; Pakhomovskii, Ya. A.; Simonov, M. A. (1988): Refined crystal structure of thalenite. Kristallografiya 33, 605-608. (In Russian.)

Schleid, T. & Müller-Bunz, H. (1998): Single crystals of Y3F[Si3O10] with thalenite-type structure. Zeitschrift für Anorganische und Allgemeine Chemie 624, 1082-1084. (In German.)

Müller-Bunz, H. and Schleid, T. (2000): Darstellung und Aufbau der Lanthanoidfluorid-catena-Trisilicate M3F[Si3O10] (M = Dy, Ho, Er) im Fluorthalenit-Typ (Y3F[Si3O10]). Z. Anorg. Allg. Chem. 626, 845-852.

Internet Links for Fluorthalénite-(Y)

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    Localities for Fluorthalénite-(Y)

    (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.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Western Keivy Massif
    Mineral and/or Locality
    Google
     
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