Gehlenite (original) (raw)
A valid IMA mineral species - grandfathered
About GehleniteHide
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Colour:
yellow-brown, colourless, greenish grey
Crystal System:
Tetragonal
Name:
Named in 1815 by Johann Nepomuk von Fuchs in honor of Adolf Ferdinand Gehlen [5 September 1775 Bütow, Outer Pomerania, Prussia (Bytów, Poland) - 16 July 1815]. Gehlen was editor and publisher of publisher of Neues Allgemeines Journal der Chemie (1803–06), Journal für Chemie und Physik (1806-10) and the Repetitorium für die Pharmacie. He was initially a chemistry professor at the University of Halle (Martin-Luther-Universität Halle-Wittenberg) and later chemist at the Bavarian Academy of Sciences. He died early due to arsenic poisoning.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:1668:7
d184827f-d342-456f-9d83-961daa2a898d
IMA Classification of GehleniteHide
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Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ca2Al(SiAl)O7
Classification of GehleniteHide
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9.BB.10
9 : SILICATES (Germanates)
B : Sorosilicates
B : Si2O7 groups, without non-tetrahedral anions; cations in tetrahedral [4] and greater coordination
55.4.1.2
55 : SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
4 : Si2O7 Groups, Generally with No Additional Anions with cations in [8] and lower coordination
16.9.1
16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Gh | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Gh | Kretz (1983) | Kretz, R. (1983) Symbols of rock-forming minerals. American Mineralogist, 68, 277–279. |
| Gh | Siivolam & Schmid (2007) | Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download |
| Gh | Whitney & Evans (2010) | Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371 |
| Gh | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of GehleniteHide
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Colour:
Yellow-brown, colourless, greenish grey
Optical Data of GehleniteHide
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RI values:
_n_ω = 1.670 _n_ε = 1.660
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of GehleniteHide
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Mindat Formula:
Ca2Al[AlSiO7]
Common Impurities:
Ti,Fe,Mg,Mn,Na,K
Crystallography of GehleniteHide
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Crystal System:
Tetragonal
Class (H-M):
42_m_ - Scalenohedral
Cell Parameters:
a = 7.6850(4) Å, c = 5.0636(3) Å
Unit Cell V:
299.05 ų (Calculated from Unit Cell)
Comment:
Synthetic material.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005090 | Gehlenite | Louisnathan S J (1971) Refinement of the crystal structure of a natural gehlenite, Ca2Al(Al,Si)2O7 The Canadian Mineralogist 10 822-837 |  |
1971 | Crestmore, California, USA | 0 | 293 |
| 0007694 | Gehlenite | Swainson I P, Dove M T, Schmahl W W, Putnis A (1992) Neutron powder diffraction study of the akermanite-gehlenite solid solution series Physics and Chemistry of Minerals 19 185-195 | 1992 | 0 | 293 | ||
| 0007695 | Gehlenite | Swainson I P, Dove M T, Schmahl W W, Putnis A (1992) Neutron powder diffraction study of the akermanite-gehlenite solid solution series Physics and Chemistry of Minerals 19 185-195 | 1992 | 0 | 293 | ||
| 0017917 | Gehlenite | Raaz F (1930) Ueber den Feinbau des Gehlenit. Ein Beitrag zur Kenntnis der Melilithe _cod_database_code 1011002 Sitzungsberichte der Akademie der Wissenschaften in Wien 139 645-672 | 1930 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.066 Å | (43) |
| 2.848 Å | (100) |
| 2.738 Å | (32) |
| 2.437 Å | (38) |
| 1.921 Å | (64) |
| 1.818 Å | (75) |
| 1.768 Å | (36) |
Geological EnvironmentHide
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Type Occurrence of GehleniteHide
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Synonyms of GehleniteHide
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Other Language Names for GehleniteHide
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Relationship of Gehlenite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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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 GehleniteHide
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References for GehleniteHide
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Localities for GehleniteHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- 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). 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.