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Khademite

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Kladno, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic

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Formula:
Al(SO
 
4
)F · 5H
 
2
O
System:Orthorhombic
Name:In honour of Nasrollah Khadem (1910– ), Director of the Geological Survey of Iran.


Compare also jurbanite and rostite.


Classification of Khademite

IMA status:Approved
Strunz 8th edition ID:6/D.06-20
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:31.9.11.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
Hey's CIM Ref.:25.6.3

25 : Sulphates
6 : Sulphates of Al and Tl
mindat.org URL:http://www.mindat.org/min-2193.html
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Type Occurrence of Khademite

Type Locality:Kavir-e-Sagand, Saghand (Sagand; Saqand), Yazd Province, Iran
Year of Discovery:1973

Crystallography of Khademite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 11.17Å, b = 13.05Å, c = 10.88Å
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:
d-spacingIntensity
4.247 (100)
4.179 (71)
3.901 (52)
3.351 (16)
2.741 (16)
2.730 (59)
2.030 (21)

Optical Data of Khademite

Type:Biaxial (-)
RI values: nα = 1.440 nβ = 1.460 nγ = 1.487
2V:Measured: 68° , Calculated: 84°
Maximum Birefringence:δ = 0.047

Chart 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(SO
 
4
)F · 5H
 
2
O
Essential elements:Al, F, H, O, S
All elements listed in formula:Al, F, H, O, S

Relationship of Khademite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DB.05Aubertite
CuAl(SO
 
4
)
 
2
Cl · 14H
 
2
O
7.DB.05Magnesioaubertite
(Mg,Cu)Al(SO
 
4
)
 
2
Cl · 14H
 
2
O
7.DB.05Svyazhinite
(Mg,Mn
2+
 
,Ca)(Al,Fe
3+
 
)(SO
 
4
)
 
2
F · 14H
 
2
O
7.DB.10Rostite
Al(SO
 
4
)(OH) · 5H
 
2
O
7.DB.15Jurbanite
Al(SO
 
4
)(OH) · 5H
 
2
O
7.DB.20Minasragrite
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
7.DB.20Orthominasragrite
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
7.DB.20Anorthominasragrite
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
7.DB.25Bobjonesite
(V
4+
 
O)(SO
 
4
) · 3H
 
2
O
7.DB.30Amarantite
Fe
3+
2
(SO
 
4
)
 
2
O · 7H
 
2
O
7.DB.30Hohmannite
Fe
3+
2
(SO
 
4
)
 
2
O · 8H
 
2
O
7.DB.30Metahohmannite
Fe
3+
2
(SO
 
4
)
 
2
O · 4H
 
2
O
7.DB.35Aluminocopiapite
Al
 
2/3
Fe
3+
4
(SO
 
4
)
 
6
(OH)
 
2
 · 20H
 
2
O
7.DB.35Calciocopiapite
CaFe
 
4
(SO
 
4
)
 
6
(OH)
 
2
 · 10H
 
2
O
7.DB.35Copiapite
Fe
2+
 
Fe
3+
4
(SO
 
4
)
 
6
(OH)
 
2
 · 20H
 
2
O
7.DB.35Cuprocopiapite
CuFe
 
4
(SO
 
4
)
 
6
(OH)
 
2
 · 20H
 
2
O
7.DB.35Ferricopiapite
Fe
 
5
(SO
 
4
)
 
6
O(OH) · 20H
 
2
O
7.DB.35Magnesiocopiapite
MgFe
3+
4
(SO
 
4
)
 
6
(OH)
 
2
 · 20H
 
2
O
7.DB.35Zincocopiapite
ZnFe
3+
4
(SO
 
4
)
 
6
(OH)
 
2
 · 18H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.6.1Rostite
Al(SO
 
4
)(OH) · 5H
 
2
O
25.6.2Jurbanite
Al(SO
 
4
)(OH) · 5H
 
2
O
25.6.4Meta-aluminite
Al
 
2
(SO
 
4
)(OH)
 
4
 · 5H
 
2
O
25.6.5Aluminite
Al
 
2
(SO
 
4
)(OH)
 
4
 · 7H
 
2
O
25.6.6Meta-alunogen
Al
 
2
(SO
 
4
)
 
3
 · 12H
 
2
O
25.6.7Alunogen
Al
 
2
(SO
 
4
)
 
3
 · 17H
 
2
O
25.6.8Felsőbányaite
Al
 
4
(SO
 
4
)(OH)
 
10
 · 4H
 
2
O
25.6.9Basaluminite
25.6.10Hydrobasaluminite
Al
 
4
(SO
 
4
)(OH)
 
10
 · 12-36H
 
2
O
25.6.11Zaherite
Al
 
12
(SO
 
4
)
 
5
(OH)
 
26
 · 20H
 
2
O
25.6.12Tamarugite
NaAl(SO
 
4
)
 
2
 · 6H
 
2
O
25.6.13Mendozite
NaAl(SO
 
4
)
 
2
 · 11H
 
2
O
25.6.14Alum-(Na)
NaAl(SO
 
4
)
 
2
 · 12H
 
2
O
25.6.15Natroalunite
(Na,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
25.6.16Kalinite
KAl(SO
 
4
)
 
2
 · 11H
 
2
O Not confirmed
25.6.17Alum-(K)
KAl(SO
 
4
)
 
2
 · 12H
 
2
O
25.6.18Alunite
KAl
 
3
(SO
 
4
)
 
2
(OH)
 
6
25.6.19Minamiite
(Na,Ca
 
0.5
,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
25.6.20Tschermigite
(NH
 
4
)Al(SO
 
4
)
 
2
 · 12H
 
2
O

Other Names for Khademite

Other Languages:
German:Khademit
Russian:Хадемит
Spanish:Khademita

Other Information

Health Warning: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

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  • Khademite details from Handbook of Mineralogy (PDF)
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    • Localities for Khademite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    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 Mts
        • 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); Kolitsch U., Brandstätter F. - A new salt-inclusion sulphate phase from a burning coal dump - 2007 - 16th Croatian-Slovenian crystallographic meeting page 12
    Hungary
     
    • Nógrád Co.
      • Cserhát Mts.
    		HOM Collection,2006 Geoda - The journal of Hungarian Friends of Minerals
    Iran
     
    • 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
    Romania
     
    • Suceava Co.
      • Suceava district
    		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).
    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. Mineral. Mag. 47, 37-40; Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    Mineral and/or Locality
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