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Sverigeite
A valid IMA mineral species
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About Sverigeite
Flag of Sweden
Formula:
NaMnMgSnBe2(SiO4)3(OH)
Colour:
Yellow in transmitted light, pale yellow to yellow
Lustre:
Vitreous
Hardness:
6½
Specific Gravity:
3.6
Crystal System:
Orthorhombic
Name:
Named for the country of origin, Sweden (Sverige).
Occurs as platy aggregates.
Unique Identifiers
Mindat ID:
3839
Long-form identifier:
mindat:1:1:3839:9
IMA Classification of Sverigeite
Classification of Sverigeite
9.AE.15
9 : SILICATES (Germanates)
A : Nesosilicates
E : Nesosilicates with additional anions (O,OH,F,H2O); cations in tetrahedral [4] coordination
9 : SILICATES (Germanates)
A : Nesosilicates
E : Nesosilicates with additional anions (O,OH,F,H2O); cations in tetrahedral [4] coordination
Dana 7th ed.:
51.2.2.1
51.2.2.1
51 : NESOSILICATES Insular SiO4 Groups Only
2 : Insular SiO4 Groups Only with cations in [4] as well as >[4]
51 : NESOSILICATES Insular SiO4 Groups Only
2 : Insular SiO4 Groups Only with cations in [4] as well as >[4]
14.3.21
14 : Silicates not Containing Aluminum
3 : Silicates of Be
14 : Silicates not Containing Aluminum
3 : Silicates of Be
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Svg | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Sverigeite
Vitreous
Transparency:
Translucent
Colour:
Yellow in transmitted light, pale yellow to yellow
Streak:
Light yellow
Hardness:
6½ on Mohs scale
Cleavage:
Perfect
Perfect on {010}, two other directions distinct
Perfect on {010}, two other directions distinct
Density:
3.6 g/cm3 (Measured) 3.61 g/cm3 (Calculated)
Optical Data of Sverigeite
Type:
Biaxial (+)
RI values:
nα = 1.678 nβ = 1.684 nγ = 1.699
2V:
Measured: 65° to 69°, Calculated: 66°
Max. Birefringence:
δ = 0.021
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r < v strong
Pleochroism:
Visible
Comments:
Pleochroism moderate; X=yellow; Y~Z=pale yellow
Comments:
Orientation: Z=b. Absorption: X>Y~Z
Chemistry of Sverigeite
Mindat Formula:
NaMnMgSnBe2(SiO4)3(OH)
Element Weights:
Common Impurities:
Fe,Zn,H2O
Crystallography of Sverigeite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Imma
Cell Parameters:
a = 10.81 Å, b = 13.27 Å, c = 6.81 Å
Ratio:
a:b:c = 0.815 : 1 : 0.513
Unit Cell V:
976.89 ų (Calculated from Unit Cell)
Z:
4
Morphology:
In well-formed complex crystals, to 2 mm, elongated parallel to [001]; as irregular platy aggregates
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0001282 | Sverigeite | Rouse R C, Peacor D R, Metz G W (1989) Sverigeite, a structure containing planar NaO4 groups and chains of 3- and 4-membered beryllosilicate rings American Mineralogist 74 1343-1350 |  | 1989 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.884 Å | (100) |
| 2.826 Å | (90) |
| 5.77 Å | (70) |
| 4.35 Å | (70) |
| 2.98 Å | (60) |
| 2.644 Å | (60) |
| 6.63 Å | (50) |
Comments:
From type locality material
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Sverigeite
Place of Conservation of Type Material:
National Musuem of Natural History, Washington, D.C.
Geological Setting of Type Material:
Mine dump, possibly part of a vein assemblage
Synonyms of Sverigeite
Other Language Names for Sverigeite
Related Minerals - Strunz-mindat Grouping
| 9.AE.05 | Beryllite | Be3(SiO4)(OH)2 · H2O |
| 9.AE.10 | Euclase | BeAl(SiO4)(OH) |
| 9.AE.20 | Hodgkinsonite | Mn2+Zn2(SiO4)(OH)2 |
| 9.AE.25 | Gerstmannite | MnMgZn(SiO4)(OH)2 |
| 9.AE.30 | Clinohedrite | CaZn(SiO4) · H2O |
| 9.AE.35 | Stringhamite | CaCu(SiO4) · H2O |
| 9.AE.40 | Katoptrite | (Mn2+,Mg)13(Al,Fe3+)4Sb5+2(SiO4)2O20 |
| 9.AE.45 | Yeatmanite | Zn6Mn2+9Sb5+2(SiO4)4O12 |
| 9.AE.50 | Sphaerobertrandite | Be3(SiO4)(OH)2 |
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.
Internet Links for Sverigeite
mindat.org URL:
https://www.mindat.org/min-3839.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Sverigeite
Localities for Sverigeite
Showing 2 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Norway | |
| Larsen (2021) |
Sweden (TL) | |
| Dunn et al. (1984) +2 other references |
Quick NavTopAbout SverigeiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesStrunz-MindatOther InformationInternet Links References Localities Locality List
A/S Granit Quarry, Tuften, Tvedalen, Larvik Commune, Vestfold, Norway