Jasmundite
A valid IMA mineral species
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About Jasmundite
Karl Jasmund
Formula:
Ca11(SiO4)4O2S
Colour:
Pale to smoky green, also greenish brown
Lustre:
Sub-Vitreous, Resinous, Dull
Hardness:
5
Specific Gravity:
3.03
Crystal System:
Tetragonal
Name:
Named in 1981 by L. S. Dent Glasser and C. K. Lee in honor of Professor Karl Jasmund [January 19, 1913 Hagenow, Germany - November 4, 2003 Köln, Germany], systematic clay mineral mineralogist, Director of the Mineralogical-Petrographic Institute, University of Köln, Köln, Germany.
Small irregular green to brown grains; may be in pseudo-isometric crystals dominant {110}, {101}, with smaller {100} and {001}.
Unique Identifiers
Mindat ID:
2080
Long-form identifier:
mindat:1:1:2080:6
IMA Classification of Jasmundite
Approved
IMA Formula:
Ca11O2(SiO4)4S2-
Approval year:
1981
First published:
1983
Classification of Jasmundite
9.AG.70
9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
52.4.7.4
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
17.9.2
17 : Silicates Containing other Anions
9 : Silicates with sulphide or sulphite
17 : Silicates Containing other Anions
9 : Silicates with sulphide or sulphite
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 |
|---|---|---|
| Jas | 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 Jasmundite
Sub-Vitreous, Resinous, Dull
Transparency:
Transparent, Translucent, Opaque
Colour:
Pale to smoky green, also greenish brown
Streak:
White
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal, Sub-Conchoidal
Density:
3.03 g/cm3 (Measured)
Optical Data of Jasmundite
Type:
Uniaxial (-)
RI values:
nω = 1.750 nε = 1.728
Birefringence:
0.022
Max. Birefringence:
δ = 0.022
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 uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Optical Extinction:
Reported optics are also unixial (+) Nω = 1.715 Nε = 1.728 due to Al, Fe, Mg substitution
Chemistry of Jasmundite
Mindat Formula:
Ca11(SiO4)4O2S
Element Weights:
Elements listed:
Common Impurities:
Al,Fe,Mg
Crystallography of Jasmundite
Crystal System:
Tetragonal
Class (H-M):
42m - Scalenohedral
Space Group:
I4m2
Setting:
I4m2
Cell Parameters:
a = 10.461 Å, c = 8.813 Å
Ratio:
a:c = 1 : 0.842
Unit Cell V:
964.43 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Dominant {110} and {101} forms.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0009735 | Jasmundite | Dent Glasser L S, Lee C K (1981) The structure of jasmundite, Ca22(SiO4)8O4S2 Acta Crystallographica B37 803-806 |  | 1981 | Ettringer Feld lava flow, Bellerberg volcano, Mayen, Eifel, Germany | 0 | 293 |
| 0020211 | Jasmundite | Ilinets A M, Bikbau M Y, Nudelman B I, Bolotina N B (1989) The peculiarities of the atomic-structure of alinite and jasmundite Kristallografiya 34 71-77 | 1989 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.396 Å | (1) |
| 6.741 Å | (1) |
| 4.405 Å | (3) |
| 4.128 Å | (8) |
| 3.367 Å | (1) |
| 3.306 Å | (6) |
| 3.242 Å | (40) |
| 2.832 Å | (100) |
| 2.756 Å | (17) |
| 2.645 Å | (12) |
| 2.615 Å | (35) |
| 2.487 Å | (6) |
| 2.437 Å | (6) |
| 2.339 Å | (14) |
| 2.247 Å | (14) |
| 2.202 Å | (9) |
| 2.151 Å | (4) |
| 2.111 Å | (6) |
| 2.066 Å | (8b) |
| 2.036 Å | (6) |
| 1.920 Å | (16) |
| 1.896 Å | (1) |
| 1.892 Å | (4) |
| 1.849 Å | (35) |
| 1.795 Å | (2) |
| 1.743 Å | (6) |
| 1.735 Å | (3) |
| 1.705 Å | (17) |
| 1.6844 Å | (13) |
| 1.6542 Å | (3) |
| 1.6433 Å | (2) |
| 1.6205 Å | (10) |
| 1.6038 Å | (4) |
| 1.5732 Å | (3) |
| 1.5491 Å | (20) |
| 1.5067 Å | (6) |
| 1.4840 Å | (3) |
| 1.4734 Å | (1) |
| 1.4690 Å | (3) |
| 1.4477 Å | (2) |
| 1.4278 Å | (3) |
| 1.4177 Å | (8b) |
| 1.4029 Å | (2) |
| 1.3914 Å | (2) |
| 1.3782 Å | (1) |
| 1.3676 Å | (2b) |
| 1.3489 Å | (2) |
| 1.3220 Å | (1b) |
| 1.3121 Å | (2) |
| 1.3085 Å | (5) |
Comments:
ICDD 33-296 (Ettringer Feld, Mayen, Germany)
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations |
Type Occurrence of Jasmundite
General Appearance of Type Material:
Irregular grains, up to several millimeters in size and occasionally, as euhedral crystals of isometric habit.
Place of Conservation of Type Material:
Mineralogical-Petrographic Institute, University of Cologne, Cologne, Germany.
Department of Chemistry, University of Aberdeen, Aberdeen, Scotland.
Department of Chemistry, University of Aberdeen, Aberdeen, Scotland.
Geological Setting of Type Material:
Metamorphosed limestone xenoliths in basalt
Associated Minerals at Type Locality:
Synonyms of Jasmundite
Other Language Names for Jasmundite
Common Associates
Associations Based on Photo Data:
| 7 photos of Jasmundite associated with Ternesite | Ca5(SiO4)2(SO4) |
| 3 photos of Jasmundite associated with Calcio-olivine | Ca2SiO4 |
Related Minerals - Strunz-mindat Grouping
| 9.AG. | Aluminotaipingite-(CeCa) | (Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4F3 |
| 9.AG. | 'Ivanyukite-Na-T' | Na2Ti4(SiO4)3(OH)O3 · 7H2O |
| 9.AG. | 'Ivanyukite-Na-C' | Na2Ti4(SiO4)3(OH)2O2 · 6H2O |
| 9.AG. | Edgrewite | Ca9(SiO4)4F2 |
| 9.AG.02 | Gatedalite | ZrMn2+2Mn3+4SiO12 |
| 9.AG.05 | Abswurmbachite | CuMn3+6(SiO4)O8 |
| 9.AG.05 | Neltnerite | CaMn3+6(SiO4)O8 |
| 9.AG.05 | Skogbyite | Zr(Mg2Mn3+4)SiO12 |
| 9.AG.05 | Braunite | Mn2+Mn3+6(SiO4)O8 |
| 9.AG.05 | 'Braunite-II' | Ca(Mn3+,Fe)14(SiO4)O20 |
| 9.AG.10 | Långbanite | Mn2+4Mn3+9Sb5+O16(SiO4)2 |
| 9.AG.12 | Taipingite-(CeCa) | (Ce7Ca2)◻Mg(SiO4)3[SiO3(OH)]4F3 |
| 9.AG.15 | Żabińskiite | Ca[Al0.5(Ta,Nb)0.5)]O(SiO4) |
| 9.AG.15 | Titanite | CaTiO(SiO4) |
| 9.AG.15 | Vanadomalayaite | CaVO(SiO4) |
| 9.AG.15 | Natrotitanite | (Na0.5Y0.5)TiO(SiO4) |
| 9.AG.15 | Malayaite | CaSnO(SiO4) |
| 9.AG.20 | Ferricerite-(LaCa) | (La6Ca3)◻Fe3+(SiO4)3(SiO3OH)4(OH)3 |
| 9.AG.20 | Aluminocerite-(CeCa) | (Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4(OH)3 |
| 9.AG.20 | Cerite-(CeCa) | (Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3 |
| 9.AG.20 | Nipeiite-(Ce) | Ce9Fe3+(SiO4)6[SiO3(OH)](OH)3 |
| 9.AG.25 | 'Yftisite-(Y)' | (Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6 |
| 9.AG.25 | Mieite-(Y) | Y4Ti(SiO4)2O[F,(OH)]6 |
| 9.AG.25 | Trimounsite-(Y) | Y2Ti2(SiO4)O5 |
| 9.AG.30 | Sitinakite | KNa2Ti4(SiO4)2O5(OH) · 4H2O |
| 9.AG.35 | Kittatinnyite | Ca2Mn2Mn(SiO4)2(OH)4 · 9H2O |
| 9.AG.40b | Paranatisite | Na2Ti(SiO4)O |
| 9.AG.40a | Natisite | Na2Ti(SiO4)O |
| 9.AG.45 | Törnebohmite-(Ce) | Ce2Al(SiO4)2(OH) |
| 9.AG.45 | Törnebohmite-(La) | La2Al(SiO4)2(OH) |
| 9.AG.50 | Ivanyukite-Na | Na2Ti4(SiO4)3(OH)2O2 · 6H2O |
| 9.AG.50 | Ivanyukite-K | K2Ti4(SiO4)3(OH)2O2 · 9H2O |
| 9.AG.50 | Ivanyukite-Cu | CuTi4(SiO4)3(OH)2O2 · 7H2O |
| 9.AG.50 | Kuliokite-(Y) | Y4Al(SiO4)2(OH)2F5 |
| 9.AG.50 | Hydroxyledgrewite | Ca9(SiO4)4(OH)2 |
| 9.AG.52 | Ulfanderssonite-(Ce) | (Ce15Ca)Σ16Mg2(SiO4)10(SiO3OH)(OH,F)5Cl3 |
| 9.AG.55 | Chantalite | CaAl2(SiO4)(OH)4 |
| 9.AG.60 | Vuagnatite | CaAl(SiO4)(OH) |
| 9.AG.60 | Mozartite | CaMn3+(SiO4)(OH) |
| 9.AG.65 | Hatrurite | Ca3(SiO4)O |
| 9.AG.75 | Afwillite | Ca3[SiO4][SiO2(OH)2] · 2H2O |
| 9.AG.80 | Bultfonteinite | Ca2(HSiO4)F · H2O |
| 9.AG.85 | Zoltaiite | BaV4+2V3+12(SiO4)2O19 |
| 9.AG.90 | Tranquillityite | (Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12 |
Fluorescence of Jasmundite
Not fluorescent in UV
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 Jasmundite
mindat.org URL:
https://www.mindat.org/min-2080.html
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Please feel free to link to this page.
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References for Jasmundite
Reference List:
Dent Glasser, L. S., Lee, C. K. (1981) The structure of jasmundite, Ca22(SiO4)8O4S2. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 37 (4) 803-806 doi:10.1107/s0567740881004366
Localities for Jasmundite
Showing 11 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.
Germany | |
| Hentschel et al. (1983) |
| Rüdinger et al. (1993) |
| Juroszek et al. (Ti 5 Fe) | |
| Hentschel (1987) |
| in the collection of Christof Schäfer | |
| Dent Glasser et al. (1981) +1 other reference |
Israel | |
| Britvin et al. (2026) |
| Murashko et al. (2025) | |
Middle East | |
| Vapnik et al. (2014) | |
Palestine | |
| Galuskin et al. (2015) +1 other reference |
Ukraine | |
| Шарыгин (2015) |
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Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany