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Scheuchzerite

Big Photo

Valgraveglia Mine (Gambatesa Mine), Reppia, Graveglia Valley, Ne, Genova Province, Liguria, Italy
© Knut Eldjarn

Show Scheuchzerite Photos (16)
Formula:
Na(Mn,Mg,Zn)
 
9
[VSi
 
9
O
 
28
(OH)](OH)
 
3
System:TriclinicColour:Yellow-orange
Hardness:2½
Name:Named for the Swiss naturalist Johann Jakob Scheuchzer (1672-1733), junior physician of the city of Zürich, curator of the Kunstkammer - a cabinet of natural history and curiosities - and he held the chair of physics and mathematics, University of Zürich. He did much work on Swiss geology and mineralogy that was essential for his time.


A single-chain silicate.

Classification of Scheuchzerite

IMA status:Approved 2004
Nickel-Strunz 10th (pending) edition ID:9.DM.35

9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
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Type Occurrence of Scheuchzerite

Type Locality:Fianel Mine, Ausserferrera, Ferrera Valley, Hinterrhein Valley, Grischun (Grisons; Graubünden), Switzerland
General Appearance of Type Material:acicular crystals up to 0.5 mm in length
Place of Conservation of Type Material:Musée Géologique Cantonal, Lausanne, Switzerland (hlotype specimen, MGL 79355).
Geological Setting of type material:Manganese-bearing veins resulting from the remobilization of ore components during retrograde Tertiary Alpine metamorphism
Associated Minerals at type locality:
TiragalloiteSaneroite

Physical Properties of Scheuchzerite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Yellow-orange
Streak:Yellow-orange
Hardness (Mohs):2½
Cleavage:Distinct/Good
Density (measured):3.5 g/cm3
Density (calculated):3.47 g/cm3

Crystallography of Scheuchzerite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 9.831Å, b = 10.107Å, c = 13.855Å
α = 86.222°, β = 73.383°, γ = 71.987°
Ratio:a:b:c = 0.973 : 1 : 1.371
Unit Cell Volume:V 1254.2 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
8.68(50)
7.91(70)
4.83(30)
3.94(30)
3.22(40)
3.09(80)
2.92(40)
Comments:From type description

Optical Data of Scheuchzerite

Type:Biaxial (+)
Pleochroism:Weak
Comments:X: brown yellow
Y: pale yellow

Chemical Properties of Scheuchzerite

Formula:
Na(Mn,Mg,Zn)
 
9
[VSi
 
9
O
 
28
(OH)](OH)
 
3
All elements listed in formula:H, Mg, Mn, Na, O, Si, V, Zn

Relationship of Scheuchzerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DM.05Stokesite
CaSn[Si
 
3
O
 
9
] · 2H
 
2
O
9.DM.10Calciohilairite
CaZr[SiO
 
3
]
 
3
·3H
 
2
O
9.DM.10Hilairite
Na
 
2
Zr[SiO
 
3
]
 
3
·3H
 
2
O
9.DM.10Komkovite
BaZr[Si
 
3
O
 
9
]·3H
 
2
O
9.DM.10Sazykinaite-(Y)
Na
 
5
YZr[SiO
 
3
]
 
6
 · 6H
 
2
O
9.DM.10Pyatenkoite-(Y)
Na
 
5
YTi[SiO
 
3
]
 
6
 · 6H
 
2
O
9.DM.15Gaidonnayite
Na
 
2
Zr[Si
 
3
O
 
9
]·2H
 
2
O
9.DM.15Georgechaoite
NaKZr[Si
 
3
O
 
9
]·2H
 
2
O
9.DM.20Chkalovite
Na
 
2
BeSi
 
2
O
 
6
9.DM.25Vlasovite
Na
 
2
ZrSi
 
4
O
 
11
9.DM.30Revdite
Na
 
16
Si
 
16
O
 
27
(OH)
 
26
·28H
 
2
O
9.DM.40Terskite
Na
 
4
ZrSi
 
6
O
 
16
·2H
 
2
O

Other Names for Scheuchzerite

Synonyms:
IMA2004-044
Other Languages:
Russian:шейхцерит

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 Scheuchzerite

Reference List:Brugger, J., Krivovichev, S., Meisser, N., Ansermet, S. & Armbruster, T. (2006): Scheuchzerite, Na(Mn,Mg)9[VSi9O28(OH)](OH)3 , a new single-chain silicate. American Mineralogist 91, 937-943.

Internet Links for Scheuchzerite

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    Localities for Scheuchzerite

    (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.
    Italy
     
    • Liguria
      • Genova Province
        • Ne
          • Graveglia Valley
            • Reppia
    		Palenzona, A., Martinelli, A., Bracco, R., Balestra, C. (2006): IMA 2004-044 (scheuchzerite) alla miniera di Gambatesa. Prie, 2, 11-12.
    Switzerland
     
    • Grischun (Grisons; Graubünden)
      • Hinterrhein Valley
        • Ferrera Valley
          • Ausserferrera
    		Brugger, J. et al. (2006): American Mineralogist: 91: 937-943.
    Mineral and/or Locality
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