Khademite (original) (raw)
A valid IMA mineral species
About KhademiteHide
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Crystal System:
Orthorhombic
Name:
In honour of Nasrollah Khadem (1918, Tehran, Iran – 5 May 1999, Tehran, Iran) [note: other sources give year of birth as 1910], mining engineer and founder and Director of the Geological Survey of Iran.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:2193:3
2dc9a549-c747-4ef4-85f4-d0a38ad93278
IMA Classification of KhademiteHide
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Type description reference:
Classification of KhademiteHide
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7.DB.10
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
B : With only medium-sized cations; insular octahedra and finite units
31.9.11.1
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
25.6.3
25 : Sulphates
6 : Sulphates of Al and Tl
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.
| Symbol | Source | Reference |
|---|---|---|
| Kdm | 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 KhademiteHide
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Density:
1.925 g/cm3 (Measured) 1.942 g/cm3 (Calculated)
Optical Data of KhademiteHide
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RI values:
_n_α = 1.440 _n_β = 1.460 _n_γ = 1.487
2V:
Measured: 68° , Calculated: 84°
δ = 0.047
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
dispersion not observed
Chemistry of KhademiteHide
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Mindat Formula:
Al(SO4)F · 5H2O
Crystallography of KhademiteHide
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Crystal System:
Orthorhombic
Class (H-M):
m m m _(_2/_m_2/_m_2/m ) - Dipyramidal
Cell Parameters:
a = 11.17 Å, b = 13.05 Å, c = 10.88 Å
Ratio:
a:b:c = 0.856 : 1 : 0.834
Unit Cell V:
1,585.96 ų (Calculated from Unit Cell)
Morphology:
Forms (010) and (001) (dominant), also (110), (111), and (313).
Comment:
Space group Pcab.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012072 | Khademite | Bachet B, Cesbron F, Chevalier R (1981) Structure cristalline de la khademite Al(SO4)F*5H2O Bulletin de Mineralogie 104 19-22 | 1981 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.247 Å | (100) |
| 4.179 Å | (71) |
| 3.901 Å | (52) |
| 3.351 Å | (16) |
| 2.741 Å | (16) |
| 2.730 Å | (59) |
| 2.030 Å | (21) |
Geological EnvironmentHide
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Type Occurrence of KhademiteHide
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Associated Minerals at Type Locality:
Reference:
Bariand, P., Berthelon, J.P., Cesbron, F., Sadrzadeh, M. (1973) New aluminum sulfate hydrate, khademite of Saghand (Iran). Comptes Rendus des Seances de l'Académie des Sciences, Série C: 277: 1585-1588.
Other Language Names for KhademiteHide
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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 KhademiteHide
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References for KhademiteHide
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Reference List:
Mauro, Daniela, Biagioni, Cristian, Pasero, Marco, Zaccarini, Federica (2020) Crystal-chemistry of sulfates from the Apuan Alps, Tuscany, Italy. VIII. New data on khademite, Al(SO4)F(H2O)5. Mineralogical Magazine, 84 (4) 540-546 doi:10.1180/mgm.2020.51
Localities for KhademiteHide
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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.