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Fianelite

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Fianel Mine, Ausserferrera, Ferrera Valley, Hinterrhein Valley, Grischun (Grisons; Graubünden), Switzerland
© R. Bracco

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Formula:
Mn
2+
2
V
5+
 
(V
5+
 
,As
5+
 
)O
 
7
·2H
 
2
O
System:MonoclinicLustre:Vitreous
Hardness:3
Name:Named after its locality.
This page provides mineralogical data about Fianelite.

Classification of Fianelite

IMA status:Approved 1995
Strunz 8th edition ID:7/C.36-10
Nickel-Strunz 10th (pending) edition ID:8.FC.05

8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
C : Polyphosphates, etc., with H2O only
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Type Occurrence of Fianelite

Type Locality:Fianel Mine, Ausserferrera, Ferrera Valley, Hinterrhein Valley, Grischun (Grisons; Graubünden), Switzerland

Physical Properties of Fianelite

Lustre:Vitreous
Hardness (Mohs):3

Crystallography of Fianelite

Crystal System:Monoclinic

Optical Data of Fianelite

Type:Biaxial
RI values: nα = 1.820 nβ = 1.820
2V:Measured: 5° to 10°
Maximum Birefringence:δ = 1.820

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

Chemical Properties of Fianelite

Formula:
Mn
2+
2
V
5+
 
(V
5+
 
,As
5+
 
)O
 
7
·2H
 
2
O
Essential elements:H, Mn, O, V
All elements listed in formula:As, H, Mn, O, V

Relationship of Fianelite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.FC.10Canaphite
CaNa
 
2
[P
 
2
O
 
7
] ·4H
 
2
O
8.FC.15Pintadoite
Ca
 
2
V
 
2
O
 
7
·9H
 
2
O
8.FC.20Arnhemite
(K,Na)
 
4
Mg
 
2
(P
 
2
O
 
7
)·5H
 
2
O
8.FC.25Wooldridgeite
CaNa
 
2
Cu
2+
2
[P
 
2
O
 
7
]
 
2
 · 10H
 
2
O
8.FC.30Kanonerovite
MnNa
 
3
P
 
3
O
 
10
 * 12 H
 
2
O

Other Names for Fianelite

Synonyms:
IMA1995-016
Other Languages:
German:Fianelit
Russian:Фианелит
Spanish:Fianelita

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 Fianelite

Reference List:Mineralogical Record: 28: 401-402.

Brugger, J. & Berlepsch, P. (1996): Description and crystal structure of fianelite, Mn2V(V,As)O7.2H2O, a new mineral from Fianel, Val Ferrera, Graubünden, Switzerland. American Mineralogist: 81: 1270-1276.

Internet Links for Fianelite

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    Localities for Fianelite

    (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.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Saitama Prefecture
          • Iruma-gun
    		Yamada et al (2000) Koubutsu-Gakkai Kou\'en-Youshi, 88.
    Switzerland
     
    • Grischun (Grisons; Graubünden)
      • Hinterrhein Valley
        • Ferrera Valley
          • Ausserferrera
    		Am.Min.: 81:1270-1276.
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