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Hügelite

Formula:
Pb
 
2
(UO
 
2
)
 
3
[O|AsO
 
4
]
 
2
 · 5H
 
2
O
System:MonoclinicColour:Brown, orange-yellow, ...
Hardness:2 - 3
Name:
After Baron Friedrich von Hügel (1852–1925), Austrian-British theologian.
This page provides mineralogical data about Hügelite.

Classification of Hügelite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/E.07-100
Nickel-Strunz 10th (pending) edition ID:8.EC.15

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
Dana 8th edition ID:42.4.5.2

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq·xH2O
Hey's CIM Ref.:20.7.16

20 : Arsenates (also arsenates with phosphate, but without other anions)
7 : Arsenates of U
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Type Occurrence of Hügelite

Type Locality:Michael Mine, Weiler, Reichenbach, Lahr, Black Forest, Baden-Württemberg, Germany
Geological Setting of type material:Secondary mineral in hornstone breccia

Physical Properties of Hügelite

Lustre:Adamantine, Greasy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Brown, orange-yellow, yellowish brown
Streak:Light yellow
Hardness (Mohs):2 - 3
Tenacity:Brittle
Cleavage:Distinct/Good
Good on {100}
Probable on {110}
Fracture:Conchoidal
Density (measured):5.1 g/cm3
Density (calculated):5.8 g/cm3

Crystallography of Hügelite

Crystal System:Monoclinic
Cell Parameters:a = 8.13(20) Å, b = 17.27(20) Å, c = 7.01(20) Å
β = 109°
Ratio:a:b:c = 0.471 : 1 : 0.406
Unit Cell Volume:V 930.62 ų (Calculated from Unit Cell)
Z:2
Morphology:Crystals prismatic [001], with {110}, {001} and {011}.

Optical Data of Hügelite

Type:Biaxial (+)
RI values: nα = 1.898 nγ = 1.915
2V:Measured: 25°
Maximum Birefringence:δ = 0.017

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v extreme
Pleochroism:Strong
Comments:X= yellow
Y= yellow with orange tint
Z= colorless to pale yellow

Chemical Properties of Hügelite

Formula:
Pb
 
2
(UO
 
2
)
 
3
[O|AsO
 
4
]
 
2
 · 5H
 
2
O
Essential elements:As, H, O, Pb, U
All elements listed in formula:As, H, O, Pb, U

Relationship of Hügelite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.EC.05Françoisite-(Nd)
(Nd,Ce,Sm)(UO
 
2
)
 
3
[O|OH|(PO
 
4
)
 
2
] · 6H
 
2
O
8.EC.05Phuralumite
Al
 
2
(UO
 
2
)
 
3
[(OH)
 
2
|(PO
 
4
)
 
3
] · 13H
 
2
O
8.EC.05Upalite
Al(UO
 
2
)
 
3
(PO
 
4
)
 
2
O(OH)·7H
 
2
O
8.EC.05Françoisite-(Ce)
(Ce,Nd,Ca)[(UO
 
2
)
 
3
O(OH)(PO
 
4
)
 
2
]·6H
 
2
O
8.EC.10Arsenuranylite
Ca(UO
 
2
)
 
4
[(OH)
 
2
|AsO
 
4
]
 
2
 · 6H
 
2
O
8.EC.10Dewindtite
Pb(UO
 
2
)
 
3
[OH|PO
 
4
]
 
2
 · 3H
 
2
O
8.EC.10Kivuite
H
 
2
Th(UO
 
2
)
 
3
[O|OH|(PO
 
4
)
 
2
] · 6H
 
2
O (?)
8.EC.10Phosphuranylite
(H
 
3
O)
 
3
KCa(UO
 
2
)
 
7
[O|PO
 
4
]
 
4
 · 8H
 
2
O
8.EC.10Yingjiangite
K
 
2
Ca(UO
 
2
)
 
7
(PO
 
4
)
 
4
(OH)
 
6
 · 6H
 
2
O
8.EC.10Renardite
8.EC.15Dumontite
Pb
 
2
(UO
 
2
)
 
3
[(OH)
 
2
|PO
 
4
]
 
2
 · 3H
 
2
O
8.EC.20Metavanmeersscheite
U
4+
 
(UO
 
2
)
 
3
[(OH)
 
2
|PO
 
4
]
 
2
 · 2H
 
2
O
8.EC.20Vanmeersscheite
U
4+
 
(UO
 
2
)
 
3
[(OH)
 
2
|PO
 
4
]
 
2
 · 4H
 
2
O
8.EC.20Arsenovanmeersscheite
U
4+
 
(UO
 
2
)
 
3
(AsO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.EC.25Althupite
AlTh(UO
 
2
)
 
7
[O
 
2
|(OH)
 
5
|(PO
 
4
)
 
4
] · 15H
 
2
O
8.EC.30Mundite
Al(UO
 
2
)
 
3
[(OH)
 
3
|(PO
 
4
)
 
2
] · 5.5H
 
2
O
8.EC.35Phurcalite
Ca
 
2
(UO
 
2
)
 
3
[O|PO
 
4
]
 
2
 · 7H
 
2
O
8.EC.40Bergenite
Ca
 
2
Ba
 
4
[(UO
 
2
)
 
3
O
 
2
(PO
 
4
)
 
2
]
 
3
·16H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
20.7.1Trögerite
(UO
 
2
)
 
3
(AsO
 
4
)
 
2
·12H
 
2
O (?)
20.7.2Natrouranospinite
(Na
 
2
,Ca)(UO
 
2
)
 
2
[AsO
 
4
]
 
2
 · 5H
 
2
O
20.7.3Abernathyite
K
 
2
(UO
 
2
)
 
2
[AsO
 
4
]
 
2
 · 6H
 
2
O
20.7.4Metazeunerite
Cu(UO
 
2
)
 
2
[AsO
 
4
]
 
2
 · 8H
 
2
O
20.7.5Zeunerite
Cu(UO
 
2
)
 
2
(AsO
 
4
)
 
2
·12H
 
2
O
20.7.6Metanováčekite
Mg(UO
 
2
)
 
2
[AsO
 
4
]
 
2
 · 4-8H
 
2
O
20.7.7Nováčekite-I
Mg(UO
 
2
)
 
2
(AsO
 
4
)
 
2
·12H
 
2
O
20.7.8Arsenuranylite
Ca(UO
 
2
)
 
4
[(OH)
 
2
|AsO
 
4
]
 
2
 · 6H
 
2
O
20.7.9Metauranospinite
Ca(UO
 
2
)
 
2
[AsO
 
4
]
 
2
 · 8H
 
2
O
20.7.10Uranospinite
Ca(UO
 
2
)(AsO
 
4
)
 
2
·10H
 
2
O
20.7.11Metaheinrichite
Ba(UO
 
2
)
 
2
[AsO
 
4
]
 
2
 · 8H
 
2
O
20.7.12Heinrichite
Ba(UO
 
2
)
 
2
(AsO
 
4
)
 
2
·10H
 
2
O
20.7.13Metalodèvite
Zn(UO
 
2
)
 
2
[AsO
 
4
]
 
2
 · 10H
 
2
O
20.7.14Arsenuranospathite
HAl(UO
 
2
)
 
4
(AsO
 
4
)
 
4
·40H
 
2
O
20.7.15Hallimondite
Pb
 
2
(UO
 
2
)[AsO
 
4
]
 
2
 · nH
 
2
O, 0 ≤ n ≤ 0.5
20.7.17Asselbornite
Pb(UO
 
2
)
 
4
(BiO)
 
3
(AsO
 
4
)
 
2
(OH)
 
7
·4H
 
2
O
20.7.18Metakahlerite
Fe
2+
 
(UO
 
2
)
 
2
[AsO
 
4
]
 
2
 · 8H
 
2
O
20.7.19Kahlerite
Fe(UO
 
2
)
 
2
(AsO
 
4
)
 
2
·12H
 
2
O
20.7.20Metakirchheimerite
Co(UO
 
2
)
 
2
[AsO
 
4
]
 
2
 · 8H
 
2
O

Other Names for Hügelite

Synonyms:
Huegelite
Other Languages:
German:Hügelit
Russian:Хюгелит
Spanish:Hügelita

Other Information

Health Warning:Radioactive

References for Hügelite

Reference List:Dürrfeld (1913) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 51: 278.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 815.

Walenta, K. (1979): Hügelite. Tschermaks Mineralogische und Petrographische Mitteilungen: 26, 11-19.

Locock, A. J. and P. C. Burns (2003b): The structure of hügelite, an arsenate of the phosphuranylite group, and its relationship to dumontite. Mineralogical Magazine, 67, 1109-1120.

American Mineralogist: 47: 418.

American Mineralogist: 74: 1403.

Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for Hügelite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Hügelite in the Natural History Museum (London) online catalogue
  • Hügelite details from Handbook of Mineralogy (PDF)
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    Localities for Hügelite

    (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.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Lahr
    		A.J. Locock, P.C. Burns (2003) The structure of hügelite, an arsenate of the phosphuranylite group, and its relationship to dumontite. Mineral. Mag., 67, 1109–1120.
          • Reichenbach
            • Weiler
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 815; Walenta, K. (1979): Hügelite. Tschermaks Mineral. Petrogr. Mitt. 26, 11-19; Am Min 74 (1989), 1403; Mineralogical Magazine, 2003, 67, 1109–1120; Walenta: "Die Mineralien des Schwarzwaldes", Weise (1992)
    • Rhineland-Palatinate
      • Hunsrück Mts
        • Birkenfeld
          • Ellweiler
    		Aufschluss 69/(7+8), Lapis 79/(7+8)
    • Saxony
      • Vogtland
        • Oelsnitz
    		Gröbner, J. and Kolitsch, U. (2007): The minerals of the uranium prospect at Tirpersdorf, Vogtland. Lapis 32, 37-42; 58. (in German)
    Italy
     
    • Trentino-Alto Adige
      • Trento Province
        • Condino
    		Campostrini, I., Demartin, F., & Gramaccioli, C. M. (2006). Rio Giulis. Minerali secondari del giacimento uranifero presso Condino, Trento. Rivista Mineralogica Italiana, 30(3), 152-165.
    Mineral and/or Locality
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