Log In
Sundiusite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Sundiusite
Nils G. Sundius
Formula:
Pb10(SO4)O8Cl2
Colour:
White to colourless
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
7.0
Crystal System:
Monoclinic
Name:
Named by P.J. Dunn and R.S. Rouse in 1979 after Nils Gustaf Sundius (21 May 1886, Banker, Ăstergötland, Sweden - 6 December 1976, Djursholm, Danderyd, Stockholm County, Sweden), mineralogist with the Geological Survey of Sweden, in recognition of his contributions to the mineralogy of LĂ„ngban (Sweden). Pronounced sĆ«n'-dÄ-Ć«s-ite.
The name was used previously for a hypothetical amphibole, but its use not widely recognized.
The name was used previously for a hypothetical amphibole, but its use not widely recognized.
Unique Identifiers
Mindat ID:
3828
Long-form identifier:
mindat:1:1:3828:3
IMA Classification of Sundiusite
Classification of Sundiusite
7.BD.70
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
30.1.1.1
30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
26.24
26 : Sulphates with Halide
26 : Sulphates with Halide
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Sun | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Sundiusite
Adamantine
Transparency:
Translucent
Colour:
White to colourless
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{100}
{100}
Density:
7.0 g/cm3 (Measured) 7.20 g/cm3 (Calculated)
Optical Data of Sundiusite
Type:
Biaxial (+)
RI values:
nα = 2.1 nγ = 2.17
Max. Birefringence:
δ = 0.070
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 ”m 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 ”m 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.
No measured or calculated 2V is on file for this mineral, so the value used here (91°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
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.
No measured or calculated 2V is on file for this mineral, so the value used here (91°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Dispersion:
r < v extreme
Chemistry of Sundiusite
Mindat Formula:
Pb10(SO4)O8Cl2
Element Weights:
Elements listed:
Crystallography of Sundiusite
Crystal System:
Monoclinic
Cell Parameters:
a = 24.67(1) Å, b = 3.781(1) Å, c = 11.881(5) Å
β = 100.07(4)°
β = 100.07(4)°
Ratio:
a:b:c = 6.525 : 1 : 3.142
Unit Cell V:
1,091.15 Ă
Âł (Calculated from Unit Cell)
Comment:
Space group C2/m, C2 or Cm.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.10 Ă | (30) |
| 3.744 Ă | (30) |
| 3.101 Ă | (60) |
| 3.044 Ă | (60) |
| 2.981 Ă | (100) |
| 2.737 Ă | (80) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47b : [Sulfates and sulfites] | |
| 47g : [Halogen-bearing surface weathering minerals] | |
| 47h : [Near-surface oxidized, dehydrated minerals] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 56 : Slag and smelter minerals (see also #51 and #55) |
Type Occurrence of Sundiusite
General Appearance of Type Material:
Plumose aggregates of overlapping crystals
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1980,580.
Royal Ontario Museum, Toronto, Canada, M36619
Harvard University, 117086.
National Museum of Natural History, Washington, D.C., USA, 134984.
Royal Ontario Museum, Toronto, Canada, M36619
Harvard University, 117086.
National Museum of Natural History, Washington, D.C., USA, 134984.
Synonyms of Sundiusite
Other Language Names for Sundiusite
Common Associates
Related Minerals - Strunz-mindat Grouping
| 7.BD. | Hasanovite | KNa(MoO2)(SO4)2 |
| 7.BD. | Kennygayite | [Pb4O2(OH)2](SO4) |
| 7.BD. | Adanite | Pb2(Te4+O3)(SO4) |
| 7.BD. | Cadsulfohite | Cd2(SO4)(OH)2 |
| 7.BD. | Hyblerite | Pb4Bi2(SO4)2(CO3)O4 |
| 7.BD. | Zanelliite | PbCu9[AsO3.5(OH)0.5]2(AsO4)2(OH)9(H2O)3 |
| 7.BD. | Evanichite | Pb6Cr3+(Cr6+O4)2(SO4)(OH)7FCl |
| 7.BD.05 | Sulphohalite | Na6(SO4)2FCl |
| 7.BD.10 | Galeite | Na15(SO4)5F4Cl |
| 7.BD.10 | Schairerite | Na21(SO4)7ClF6 |
| 7.BD.15 | Kogarkoite | Na3(SO4)F |
| 7.BD.20 | Aiolosite | Na4Bi(SO4)3Cl |
| 7.BD.20 | Caracolite | Na3Pb2(SO4)3Cl |
| 7.BD.20 | Cesanite | Na3Ca2(SO4)3(OH) |
| 7.BD.25 | Burkeite | Na6(CO3)(SO4)2 |
| 7.BD.30 | Hanksite | Na22K(SO4)9(CO3)2Cl |
| 7.BD.35 | Cannonite | Bi2(SO4)O(OH)2 |
| 7.BD.40 | Lanarkite | Pb2(SO4)O |
| 7.BD.45 | Grandreefite | Pb2(SO4)F2 |
| 7.BD.50 | Itoite | Pb3Ge4+(SO4)2O2(OH)2 |
| 7.BD.55 | Chiluite | Bi3Te6+Mo6+O10.5 |
| 7.BD.60 | Hectorfloresite | Na9(SO4)4(IO3) |
| 7.BD.65 | Pseudograndreefite | Pb6(SO4)F10 |
Fluorescence of Sundiusite
None observed.
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 Sundiusite
mindat.org URL:
https://www.mindat.org/min-3828.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Sundiusite
Localities for Sundiusite
Showing 3 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Germany | |
| BlaĂ et al. (1993) +1 other reference |
Sweden (TL) | |
| Dunn et al. (1980) +2 other references |
UK | |
| ex Steve Rust collection specimen now ... +1 other reference |
Quick NavTopAbout SundiusiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden