Scheuchzerite
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About Scheuchzerite
Johann Jakob Scheuchzer (1672-1733)
Formula:
Na(Mn,Mg,Zn)9[VSi9O28(OH)](OH)3
Colour:
Yellow-orange
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
3.5
Crystal System:
Triclinic
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. 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
Approved
Approval Year:
2004
9.DM.35
9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
Physical Properties of Scheuchzerite
Vitreous
Transparency:
Transparent
Colour:
Yellow-orange
Streak:
Yellow-orange
Hardness:
2½ on Mohs scale
Cleavage:
Distinct/Good
Density:
3.5 g/cm3 (Measured) 3.47 g/cm3 (Calculated)
Optical Data of Scheuchzerite
Type:
Biaxial (+)
Pleochroism:
Weak
Comments:
X: brown yellow
Y: pale yellow
Y: pale yellow
Chemical Properties of Scheuchzerite
Formula:
Na(Mn,Mg,Zn)9[VSi9O28(OH)](OH)3
IMA Formula:
NaMn2+9Si9V5+O28(OH)4
Crystallography of Scheuchzerite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 9.831 Å, b = 10.107 Å, c = 13.855 Å
α = 86.222°, β = 73.383°, γ = 71.987°
α = 86.222°, β = 73.383°, γ = 71.987°
Ratio:
a:b:c = 0.973 : 1 : 1.371
Unit Cell V:
1254.2 ų
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.68 | (50) |
| 7.91 | (70) |
| 4.83 | (30) |
| 3.94 | (30) |
| 3.22 | (40) |
| 3.09 | (80) |
| 2.92 | (40) |
| 2.71 | (100) |
Comments:
From type description
Type Occurrence of Scheuchzerite
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:
Synonyms of Scheuchzerite
Other Language Names for Scheuchzerite
Russian:шейхцерит
Related Minerals - Nickel-Strunz Grouping
| 9.DM.05 | Stokesite | CaSn[Si3O9] · 2H2O | Orth. mmm (2/m 2/m 2/m) : Pnna |
| 9.DM.10 | Calciohilairite | CaZr[SiO3]3 · 3H2O | Trig. |
| 9.DM.10 | Hilairite | Na2Zr[SiO3]3 · 3H2O | Trig. |
| 9.DM.10 | Komkovite | BaZr[Si3O9] · 3H2O | Trig. |
| 9.DM.10 | Sazykinaite-(Y) | Na5YZr[SiO3]6 · 6H2O | |
| 9.DM.10 | Pyatenkoite-(Y) | Na5YTi[SiO3]6 · 6H2O | Trig. |
| 9.DM.15 | Gaidonnayite | Na2Zr(Si3O9) · 2H2O | Orth. mmm (2/m 2/m 2/m) : Pmna |
| 9.DM.15 | Georgechaoite | NaKZr[Si3O9] · 2H2O | Orth. mm2 |
| 9.DM.20 | Chkalovite | Na2BeSi2O6 | Orth. mm2 : Fdd2 |
| 9.DM.25 | Vlasovite | Na2ZrSi4O11 | Mon. 2/m : B2/b |
| 9.DM.30 | Revdite | Na16Si16O27(OH)26 · 28H2O | Mon. 2 : B2 |
| 9.DM.40 | Terskite | Na4ZrSi6O16 · 2H2O | Orth. |
Other Information
Health Risks:
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:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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
mindat.org URL:
https://www.mindat.org/min-27490.html
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Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Scheuchzerite
ⓘ - Click for further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)
All localities listed without proper references should be considered as questionable.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Italy | |
| Castellaro, F., Passarino, G. (2011): I minerali di Monte Alpe. Sezione dell'antica Concessione Tre Monti (La Spezia e Genova). Rivista Mineralogica Italiana. 4/2011, 214-224. |
| Palenzona, A., Martinelli, A., Bracco, R., Balestra, C. (2006): IMA 2004-044 (scheuchzerite) alla miniera di Gambatesa. Prie, 2, 11-12. |
Switzerland (TL) | |
| Brugger, J. et al. (2006): American Mineralogist: 91: 937-943. |
Valgraveglia Mine, Monte Copello, Reppia, Ne, Graveglia Valley, Genova Province, Liguria, Italy