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Ianthinite

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Big Photo

Krunkelbach Valley Uranium deposit, Menzenschwand, Black Forest, Baden-Württemberg, Germany
© Stephan Wolfsried

Show Ianthinite Photos (15)



Formula:
U
4+
 
(UO
 
2
)
 
5
O
 
7
 · 10H
 
2
O
System:OrthorhombicColour:Violet-black; dark ...
Lustre:Sub-MetallicHardness:2 - 3
Name:From the Greek ιάνθινος ("ianthinos"), violet colored, in allusion to its color.


Not very stable under ambient conditions; will dehydrate to schoepite (while becoming yellow and opaque) and further members of the schoepite group.

Classification of Ianthinite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/H.01-10
Nickel-Strunz 10th (pending) edition ID:4.GA.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
A : Without additional cations
Dana 7th edition ID:5.6.1.1
Dana 8th edition ID:5.6.1.1

5 : OXIDES CONTAINING URANIUM OR THORIUM
6 : AX6O17·xH2O
Hey's CIM Ref.:7.16.7

7 : Oxides and Hydroxides
16 : Oxides of U
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Type Occurrence of Ianthinite

Type Locality:Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
Year of Discovery:1926

Physical Properties of Ianthinite

Lustre:Sub-Metallic
Diaphaneity (Transparency):Transparent
Colour:Violet-black; dark violet in transmitted light
Streak:Brown, violet
Hardness (Mohs):2 - 3
Cleavage:Perfect
Perfect on {001}

Crystallography of Ianthinite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Amm2
Cell Parameters:a = 11.52Å, b = 7.15Å, c = 30.3Å
Ratio:a:b:c = 1.611 : 1 : 4.238
Unit Cell Volume:V 2,495.75 ų (Calculated from Unit Cell)
Morphology:Tiny rectangular plates {001} elongated [010]. Also prismatic [010], or thick tabular {001}.

Optical Data of Ianthinite

Type:Biaxial (-)
RI values: nα = 1.674 nβ = 1.900 nγ = 1.920
2V:Measured: 58° , Calculated: 30°
Maximum Birefringence:δ = 0.246

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:r > v perceptible
Pleochroism:Visible
Comments:X = c = colourless
Y = b = violet
Z = a = dark violet

Chemical Properties of Ianthinite

Formula:
U
4+
 
(UO
 
2
)
 
5
O
 
7
 · 10H
 
2
O
Essential elements:H, O, U
All elements listed in formula:H, O, U

Relationship of Ianthinite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.GA.05Metaschoepite
UO
 
3
 · 1-2H
 
2
O
4.GA.05Paraschoepite
UO
 
3
 · 2H
 
2
O
4.GA.05Schoepite
(UO
 
2
)
 
8
O
 
2
(OH)
 
12
 · 12H
 
2
O
4.GA.05Paulscherrerite
UO
 
2
(OH)
 
2
4.GA.15Metastudtite
UO
 
4
 · 2H
 
2
O
4.GA.15Studtite
[(UO
 
2
)(O
 
2
)(H
 
2
O)
 
2
] · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
7.16.1Uraninite
UO
 
2
7.16.2Schoepite
(UO
 
2
)
 
8
O
 
2
(OH)
 
12
 · 12H
 
2
O
7.16.3Paraschoepite
UO
 
3
 · 2H
 
2
O
7.16.4Metaschoepite
UO
 
3
 · 1-2H
 
2
O
7.16.5Metastudtite
UO
 
4
 · 2H
 
2
O
7.16.6Studtite
[(UO
 
2
)(O
 
2
)(H
 
2
O)
 
2
] · H
 
2
O
7.16.8Compreignacite
K
 
2
(UO
 
2
)
 
6
O
 
4
(OH)
 
6
 · 7H
 
2
O
7.16.9Vandenbrandeite
Cu(UO
 
2
)(OH)
 
4
7.16.10Roubaultite
Cu
 
2
(UO
 
2
)
 
3
(OH)
 
10
 · 5H
 
2
O
7.16.11Becquerelite
Ca(UO
 
2
)
 
6
O
 
4
(OH)
 
6
 · 8H
 
2
O
7.16.12Rameauite
K
 
2
Ca(UO
 
2
)
 
6
(OH)
 
16
 · H
 
2
O
7.16.13Agrinierite
K
 
2
(Ca,Sr)(UO
 
2
)
 
3
O
 
3
(OH)
 
2
 · 5H
 
2
O
7.16.14Protasite
Ba(UO
 
2
)
 
3
O
 
3
(OH)
 
2
 · 3H
 
2
O
7.16.15Billietite
Ba(UO
 
2
)
 
6
O
 
4
(OH)
 
6
 · 4-8H
 
2
O
7.16.16Bauranoite
Ba(UO
 
2
)
 
2
(OH)
 
6
 · 1-2H
 
2
O
7.16.17Metacalciouranoite
(Ca,Ba,Pb,K
 
2
)U
 
2
O
 
7
 · 2H
 
2
O
7.16.18Calciouranoite
(Ca,Ba,Pb)U
 
2
O
 
7
 · 5H
 
2
O
7.16.19Orthobrannerite
U
4+
 
U
6+
 
Ti
 
4
O
 
12
(OH)
 
2
7.16.20Thorutite
(Th,U,Ca)Ti
 
2
(O,OH)
 
6
7.16.21Davidite-(La)
(La,Ce)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
7.16.22Davidite-(Ce)
(Ce,La)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
7.16.23Brannerite
(U
4+
 
,REE,Th,Ca)(Ti,Fe
3+
 
,Nb)
 
2
(O,OH)
 
6
7.16.24Fourmarierite
Pb(UO
 
2
)
 
4
O
 
3
(OH)
 
4
 · 4H
 
2
O
7.16.25Richetite
Pb(UO
 
2
)
 
4
O
 
5
 · 4H
 
2
O
7.16.26Curite
Pb
 
3
(UO
 
2
)
 
8
O
 
8
(OH)
 
6
 · 3H
 
2
O
7.16.27Masuyite
Pb(UO
 
2
)
 
3
O
 
3
(OH)
 
2
 · 3H
 
2
O
7.16.28Vandendriesscheite
PbU
 
7
O
 
22
 · 12H
 
2
O
7.16.29Metavandendriesscheite
PbU
 
7
O
 
22
 · nH
 
2
O n < 12
7.16.30Sayrite
Pb
 
2
(UO
 
2
)
 
5
O
 
6
(OH)
 
2
 · 4H
 
2
O
7.16.31Wölsendorfite
(Pb,Ca)U
 
2
O
 
7
 · 2H
 
2
O
7.16.32Clarkeite
(Na,Ca,Pb)(UO
 
2
)O(OH) · 0-1H
 
2
O
7.16.33Uranosphaerite
Bi(UO
 
2
)O
 
2
(OH)

Other Names for Ianthinite

Synonyms:
JanthinietLanthiniteLanthinite (of Schoep)Lanthite
Other Languages:
German:Ianthinit
Janthinit
Lanthinit
Lanthit
Lianthinit
Simplified Chinese:水斑铀矿
Spanish:Ianthinita
Lanthinita
Lanthita

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 Ianthinite

Reference List:

- +
Schoep (1926), Naturrw. Tijdschr.: 7: 97.

Schoep (1927), Soc. géol. Belgique, Ann.: 49: B310.

Palache, C. (1934), American Mineralogist: 19: 309.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 633-634.

American Mineralogist (1959): 44: 1103.

Burns, P.C., Finch, R.J., Hawthorne, F.C., Miller, M.L., and Ewing, R.C. (1997c) The crystal structure of ianthinite, [U 4+ 2(UO2)4O6(OH)4(H2O)4](H2O)5: a possible phase for Pu 4+ incorporation during the oxidation of spent nuclear fuel. Journal of Nuclear Mater.: 249: 199-206.

American Mineralogist: 83 (1998): 911.

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 Ianthinite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Ianthinite details from Handbook of Mineralogy (PDF)
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    • Localities for Ianthinite

    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.
    Australia
     
    • Tasmania
      • Rossarden district
    		Bottrill (unpub)
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
      • Katanga Copper Crescent
        • Kolwezi District
          • Kolwezi
        • Shinkolobwe
    		[Bull. de Min.82 (1959), 80; Clark, 1993 - "Hey's Mineral Index"]
        • Swambo
    		MinRec 20:287-288
    France
     
    • Auvergne
      • Puy-de-Dôme
        • Puy-Guillaume
          • Lachaux
    		Le Règne Minéral, Hors Série IV (1998)
    J. Geffroy, J.A. Sarcia, J. Chervet : "Les Minéraux Uranifères Français", 1960, Institut National des Sciences et Techniques Nucléaires / Saclay - PUF.
    • Burgundy
      • Saône-et-Loire
        • Gueugnon
          • Neuvy-Grandchamp
    		Le Règne Minéral, Hors Série IV, 1998
    • Languedoc-Roussillon
      • Hérault
        • Lodève
    		Le Règne Minéral, Hors Série IV (1998)
    [Le Cahier des Micromonteurs, 1998, 2, p.13-26]
    [Le Règne Minéral 1997, 13, p.5-18]
    • Limousin
      • Haute-Vienne
        • Compreignac
    		Le Règne Minéral, Hors Série IV, 1998
    Le Règne Minéral, Hors Série IV (1998)
        • Saint-Sylvestre
    		Le Règne Minéral, Hors Série IV, 1998
    • Poitou-Charentes
      • Deux-Sèvres
        • La Chapelle Largeau
    		Le Cahier des micromonteurs, 2002, N°75, pp 8-25
        • Saint-Amand-sur-Sèvre
    		Le Cahier des micromonteurs, 2002, N°75, pp 8-25
    • Rhône-Alpes
      • Loire
        • Saint-Just-en-Chevalet
          • Saint-Priest-la-Prugne
    		Le Règne Minéral, Hors Série IV, 1998
    J. Chervet et G. Branche : "Contribution à l'Etude des Minéraux Secondaires d'Uranium Français", Annales de l'Ecole Nationale Supérieure de Géologie Appliquée et de Prospection Minière de l'Université de Nancy, 1955 ; J.-J. Périchaud: "Où trouver les minéraux d'Auvergne", Vol. 1, Editions l'Instant Durable (Clermont-Ferrand), 1985, p. 92
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Menzenschwand
    		No reference listed
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		KOLITSCH, U. (1997): Ianthinit und weitere Neufunde aus der Grube Clara im mittleren Schwarzwald. - Erzgräber 11 (2), 76-88; WALENTA, K. (1999): Neue Mineralfunde von der Grube Clara. 8. Folge, 1. Teil. Lapis 24 (11), 34-37; Gröbner, J., Kolitsch, U. und Bayerl, R. (2005): Interessante Uranmineralien im Stinkspat der Grube Clara. Lapis 30 (10), 34-39; 90; Gröbner, J., Bayerl, R. und Kolitsch, U. (2006): Weitere Beobachtungen zu den Uran- und Vanadium-Paragenesen der Grube Clara aus den Jahren 2002, 2004 und 2005. Erzgräber 20, 1-10
    • Bavaria
      • Upper Palatinate
        • Oberpfälzer Wald
          • Mähring
            • Uranium deposit
    		Weiss: "Mineralfundstellen, Deutschland West", 1990
        • Schwandorf
          • Wölsendorf Fluorite mining District
            • Wölsendorf East District (Wölsendorf - Nabburg District)
    		No reference listed
    Italy
     
    • Sardinia
      • Cagliari Province
        • Capoterra
    		Olmi F., Sabelli C., Senesi F., Stara P., 2002. La mineralizzazione uranifera di Arcu su Linnarbu. Riv. Miner. Ital., 3: 148-169.
    • 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.
    Mexico
     
    • Chihuahua
      • Mun. de Aldama
        • Peña Blanca District
          • Sierra Peña Blanca
    http://www.swri.org/4org/d20/ghs/PBlanca/mineral.html
    Slovakia
     
    • Banská Bystrica Region
      • Rimavská Sobota Co.
    		Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    • Košice Region
      • Spišská Nová Ves Co.
        • Hnilčík
    		Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
        • Spišská Nová Ves Mining District
          • Novoveská Huta
    		Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    USA
     
    • Colorado
      • Gunnison Co.
        • Marshall Pass District
    		Minerals of Colorado (1997) E.B. Eckels
      • Saguache Co.
        • Marshall Pass District
    		Minerals of Colorado (1997) Eckel, E. B.; Am Min 50:909-923
    Minerals of Colorado (1997) Eckels, E. B.
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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