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Khademite

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Formula:
Al(SO4)F · 5H2O
System:
Orthorhombic
Name:
In honour of Nasrollah Khadem (1918–1999) [note: other sources give year of birth as 1910], founder and Director of the Geological Survey of Iran.
Compare also jurbanite and rostite.




Classification of Khademite

Approved
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

Optical Data of Khademite

Type:
Biaxial (-)
RI values:
nα = 1.440 nβ = 1.460 nγ = 1.487
2V:
Measured: 68° , Calculated: 84°
Max Birefringence:
δ = 0.047
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
dispersion not observed

Chemical Properties of Khademite

Formula:
Al(SO4)F · 5H2O
IMA Formula:
AlSO4F · 5H2O
Elements listed in formula:

Crystallography of Khademite

Crystal System:
Orthorhombic
Class (H-M):
mmm (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 Volume:
V 1,585.96 ų (Calculated from Unit Cell)
Z:
8
Comment:
Space group Pcab.
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.247 (100)
4.179 (71)
3.901 (52)
3.351 (16)
2.741 (16)
2.730 (59)
2.030 (21)

Type Occurrence of Khademite

Relationship of Khademite to other Species

7.DB.05AubertiteCuAl(SO4)2Cl · 14H2O
7.DB.05Magnesioaubertite(Mg,Cu)Al(SO4)2Cl · 14H2O
7.DB.05Svyazhinite(Mg,Mn2+,Ca)(Al,Fe3+)(SO4)2F · 14H2O
7.DB.10RostiteAl(SO4)(OH) · 5H2O
7.DB.15JurbaniteAl(SO4)(OH) · 5H2O
7.DB.20Minasragrite(V4+O)(SO4) · 5H2O
7.DB.20Orthominasragrite(V4+O)(SO4) · 5H2O
7.DB.20Anorthominasragrite(V4+O)(SO4) · 5H2O
7.DB.25Bobjonesite(V4+O)(SO4) · 3H2O
7.DB.30AmarantiteFe23+(SO4)2O · 7H2O
7.DB.30HohmanniteFe23+(SO4)2O · 8H2O
7.DB.30MetahohmanniteFe23+(SO4)2O · 4H2O
7.DB.35AluminocopiapiteAl2/3Fe43+(SO4)6(OH)2 · 20H2O
7.DB.35CalciocopiapiteCaFe4(SO4)6(OH)2 · 10H2O
7.DB.35CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
7.DB.35CuprocopiapiteCuFe4(SO4)6(OH)2 · 20H2O
7.DB.35FerricopiapiteFe5(SO4)6O(OH) · 20H2O
7.DB.35MagnesiocopiapiteMgFe43+(SO4)6(OH)2 · 20H2O
7.DB.35ZincocopiapiteZnFe43+(SO4)6(OH)2 · 18H2O
25.6.1RostiteAl(SO4)(OH) · 5H2O
25.6.2JurbaniteAl(SO4)(OH) · 5H2O
25.6.4Meta-aluminiteAl2(SO4)(OH)4 · 5H2O
25.6.5AluminiteAl2(SO4)(OH)4 · 7H2O
25.6.6Meta-alunogenAl2(SO4)3 · 12H2O
25.6.7AlunogenAl2(SO4)3 · 17H2O
25.6.8FelsőbányaiteAl4(SO4)(OH)10 · 4H2O
25.6.9BasaluminiteAl4(SO4)(OH)10 · 4H2O
25.6.10HydrobasaluminiteAl4(SO4)(OH)10 · 12-36H2O
25.6.11ZaheriteAl12(SO4)5(OH)26 · 20H2O
25.6.12TamarugiteNaAl(SO4)2 · 6H2O
25.6.13MendoziteNaAl(SO4)2 · 11H2O
25.6.14Alum-(Na)NaAl(SO4)2 · 12H2O
25.6.15NatroaluniteNaAl3(SO4)2(OH)6
25.6.16KaliniteKAl(SO4)2 · 11H2O Not confirmed
25.6.17Alum-(K)KAl(SO4)2 · 12H2O
25.6.18AluniteKAl3(SO4)2(OH)6
25.6.19Natroalunite-2c(Na,Ca0.5,K)Al3(SO4)2(OH)6
25.6.20Tschermigite(NH4)Al(SO4)2 · 12H2O

Other Names for Khademite

Name in Other Languages:
German:Khademit
Simplified Chinese:斜方氟铝矾
Spanish:Khademita

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.

References for Khademite

Reference List:
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 (in French).

American Mineralogist (1981): 66: 1102.

Williams, S. A. & Cesbron, F. P. (1983): Wilcoxite and lannonite, two new fluosulfates from Catron County, New Mexico. Mineral. Mag. 47, 37-40. [includes new analytical data for khademite]

American Mineralogist (1988): 73: 1499.

American Mineralogist (1989): 74: 951.

Bulletin de Mineralogie: 104: 19-22.

Neues Jahrbuch für Mineralogie, Monatshefte (1988): 10: 476-480.

Internet Links for Khademite

mindat.org URL:
https://www.mindat.org/min-2193.html
Please feel free to link to this page.

Localities for Khademite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Chile
 
  • Tarapacá Region
    • El Tamarugal Province
      • Pampa del Tamarugal
Gunnar Farber
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
Zacek, V., Oplustil, S., Mayova, A. & Meyer, F. R. (1995): Die Mineralien von Kladno in Mittelböhmen, Tschechische Republik. Mineralien-Welt 6 (1), 13-30 (in German).
        • Libušin
http://www.handbookofmineralogy.org/pdfs/khademite.pdf
    • Hradec Králové Region
      • Trutnov (Trautenau)
        • Radvanice
Jirásek, J.: Thermal Changes of the Rocks in the Dump Pile of the Kateřina Colliery in Radvanice (Eastern Bohemia). Ostrava: VSB – Technical University of Ostrava, Institute of Geological Engineering - 541, 2001. 69 p.
Germany
 
  • Lower Saxony
    • Harz
      • Goslar
        • Rammelsberg
No reference listed
  • North Rhine-Westphalia
    • Aachen
      • Alsdorf
Blaß, G. and Strehler, H. (1993): Mineralbildungen in einer durch Selbstentzündung brennenden Bergehalde des Aachener Steinkohlenreviers. Mineralien-Welt 4 (4), 35-42. (in German); U. Kolitsch and F. Brandstätter (2007): A new salt-inclusion sulphate phase from a burning coal dump: crystal-structural, chemical and Raman-spectroscopic characterisation. Oral presentation, 16th Croatian-Slovenian Crystallographic Meeting, Petrčane, Croatia, June 13-17, 2007; abstract in Book of Abstracts, 12; Witzke, T., de Wit, F., Kolitsch, U. and Blaß, G. (2015): Mineralogy of the Burning Anna I Coal Mine Dump, Alsdorf, Germany. Chapter 7, pp. 203-240, in: Stracher, G. B., Prakash, A. and Sokol, E. V.: Coal and Peat Fires: A Global Perspective, Volume 3: Case Studies - Coal Fires, Elsevier, 786 pp.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Skarpelis, N. and Argyraki, A. (2009): The geology and origin of supergene ores in Lavrion (Attica, Greece). Resource Geology, 59, 1-14.
Hungary
 
  • Nógrád Co.
    • Cserhát Mts
HOM Collection,2006 Geoda - The journal of Hungarian Friends of Minerals
Iran (TL)
 
  • Yazd Province
    • Saghand (Sagand; Saqand)
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 (in French).; AM 66 (1981), 1102; AM 73 (1988), 1499; AM 74 (1989), 951; Bariand, P., Cesbron, F. & Berthelon, J. P. (1977): Iron sulfates of Saghand near Yazd (Iran). Memoire Hors-Série de la Société Géologique de France 8, 77-85.
Italy
 
  • Tuscany
    • Siena Province
      • Chiusdino
http://www.handbookofmineralogy.org/pdfs/khademite.pdf ; Collection Elmar Lackner
Nicaragua
 
  • León Department
    • Telica Volcano
Hynek, B. M., McCollom, T. M., Marcucci, E. C., Brugman, K. K., & Rogers, K. L. (2013, March). Assessing environmental controls on acid-sulfate alteration at active volcanoes in Nicaragua: applications to relic hydrothermal systems on mars. In 44th Lunar and Planetary Science Conference, March (pp. 18-22).; Hynek, B. M., McCollom, T. M., Marcucci, E. C., Brugman, K., & Rogers, K. L. (2013). Assessment of environmental controls on acid‐sulfate alteration at active volcanoes in Nicaragua: Applications to relic hydrothermal systems on Mars. Journal of Geophysical Research: Planets, 118(10), 2083-2104.
Romania
 
  • Suceava Co.
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
http://minerals-of-the-carpathians.eu
Russia
 
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
Tajikistan
 
  • Viloyati Sogd (Viloyati Sughd; Viloyati Khodzhent; Viloyati Leninabad)
    • Zeravshan Range
      • Yagnob River
Mike Scott S105223 from Cureton from Belekovski ID by A Roberts
USA
 
  • New Mexico
    • Catron Co.
      • Wilcox District
        • Lone Pine Hill area
Williams, S. A. & Cesbron, F. P. (1983): Wilcoxite and lannonite, two new fluosulfates from Catron County, New Mexico. Mineralogical Magazine 47, 37-40; Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
Mineral and/or Locality  
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