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Kaňkite

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Formula:
FeAsO4 · 3.5H2O
System:
Monoclinic
Hardness:
2 - 3
Name:
Named for the type locality.
Related to and easily confused with hilarionite. Compare 'UM1979-03-AsO:Fe' and 'UM1979-04-AsO:Fe'.

Crystal structure not yet solved, as the mineral decomposes in vacuum to Fe2(AsO4)(HAsO4)(OH)(H2O), that equals FeAsO4.2H2O. The crystal structure of this phase (space group Cc) has corrugated sheets of heteropolyhedra. The building unit comprises a pair of Fe-bearing octahedra decorated by 5 arsenate tetrahedra. Kaňkite dehydrates to FeAsO4.2H2O at 55–56°C. Its structure is supposed to be similar to the above described, in terms of corrugated sheets presence (Majzlan et al., 2016).


Classification of Kaňkite

Approved
8.CE.60

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
40.5.4.

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
5 : AXO4·xH2O
20.9.3

20 : Arsenates (also arsenates with phosphate, but without other anions)
9 : Arsenates of Fe

Physical Properties of Kaňkite

Hardness (Mohs):
2 - 3

Optical Data of Kaňkite

Type:
Biaxial
RI values:
nα = 1.664 nγ = 1.680
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
strong

Chemical Properties of Kaňkite

Formula:
FeAsO4 · 3.5H2O
IMA Formula:
Fe3+AsO4 · 3.5H2O
Elements listed in formula:

Crystallography of Kaňkite

Crystal System:
Monoclinic
Cell Parameters:
a = 18.8 Å, b = 17.49 Å, c = 7.63 Å
β = 92.71°
Ratio:
a:b:c = 1.075 : 1 : 0.436
Unit Cell Volume:
V 2,506.03 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
d-spacingIntensity
12.8 (100)
7.56 (25)
7.22 (21)
4.764 (34)
4.258 (25)
3.697 (22b)
2.630 (29)

Type Occurrence of Kaňkite

Relationship of Kaňkite to other Species

8.CE.XBabánekiteCu3(AsO4)2 · 8H2O
8.CE.05Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O
8.CE.05GeigeriteMn52+(AsO4)2(HAsO4)2 · 10H2O
8.CE.10NewberyiteMg(HPO4) · 3H2O
8.CE.15BrassiteMg(HAsO4) · 4H2O
8.CE.20PhosphorrössleriteMg(HPO4) · 7H2O
8.CE.20RößleriteMg(HAsO4) · 7H2O
8.CE.25MetaswitzeriteMn3(PO4)2 · 4H2O
8.CE.25Switzerite(Mn,Fe)3(PO4)2 · 7H2O
8.CE.30LindackeriteCuCu4(AsO4)2(HAsO4)2 · 9H2O
8.CE.30OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2O
8.CE.30VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2O
8.CE.30PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2O
8.CE.30KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2O
8.CE.35BobierriteMg3(PO4)2 · 8H2O
8.CE.40AnnabergiteNi3(AsO4)2 · 8H2O
8.CE.40ArupiteNi3(PO4)2 · 8H2O
8.CE.40Barićite(Mg,Fe)3(PO4)2 · 8H2O
8.CE.40ErythriteCo3(AsO4)2 · 8H2O
8.CE.40FerrisymplesiteFe33+(AsO4)2(OH)3 · 5H2O
8.CE.40HörnesiteMg3(AsO4)2 · 8H2O
8.CE.40KöttigiteZn3(AsO4)2 · 8H2O
8.CE.40Manganohörnesite(Mn,Mg)3(AsO4)2 · 8H2O
8.CE.40ParasymplesiteFe32+(AsO4)2 · 8H2O
8.CE.40VivianiteFe32+(PO4)2 · 8H2O
8.CE.40PakhomovskyiteCo3(PO4)2 · 8H2O
8.CE.45SymplesiteFe32+(AsO4)2 · 8H2O
8.CE.50CattiiteMg3(PO4)2 · 22H2O
8.CE.55KoninckiteFe3+PO4 · 3H2O
8.CE.65SteigeriteAl(VO4) · 3H2O
8.CE.70MetaschoderiteAl2(PO4)(VO4) · 6H2O
8.CE.70SchoderiteAl2(PO4)(VO4) · 8H2O
8.CE.75MalhmooditeFeZr(PO4)2 · 4H2O
8.CE.75ZigrasiteMgZr(PO4)2 · 4H2O
8.CE.75Unnamed (Ca-analogue of Zigrasite)CaZr[PO4]2 · 4H2O
8.CE.80SantabarbaraiteFe33+(PO4)2(OH)3 · 5H2O
8.CE.85Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)
20.9.1AngelelliteFe43+(AsO4)2O3
20.9.2ScoroditeFe3+AsO4 · 2H2O
20.9.4FerrisymplesiteFe33+(AsO4)2(OH)3 · 5H2O
20.9.5KaatialaiteFe(H2AsO4)3 · 5H2O
20.9.6SymplesiteFe32+(AsO4)2 · 8H2O
20.9.7ParasymplesiteFe32+(AsO4)2 · 8H2O
20.9.8Natropharmacosiderite(Na,K)Fe43+(AsO4)3(OH)4 · 6-7H2O
20.9.9PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
20.9.10KolfaniteCa2Fe33+O2(AsO4)3 · 2H2O
20.9.11ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
20.9.12YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2O
20.9.13DussertiteBaFe33+(AsO4)(AsO3OH)(OH)6
20.9.14Liskeardite[(Al,Fe)32(AsO4)18(OH)42(H2O)22] · 52H2O
20.9.15MapimiteZn2Fe33+(AsO4)3(OH)4 · 10H2O
20.9.16OgdensburgiteCa2Fe43+(Zn,Mn2+)(AsO4)4(OH)6 · 6H2O
20.9.17WalentaiteH(Ca,Mn2+,Fe2+)Fe33+(AsO4,PO4)4 · 7H2O

Other Names for Kaňkite

Name in Other Languages:
German:Kankit
Spanish:Kankita

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 Kaňkite

Reference List:
Cech, F., Jansa, J., Novák, F. (1976) Kankite, FeAsO4·3½H2O, a new mineral. Neues Jahrbuch für Mineralogie, Monatshefte: 1976: 426-436.

Fleischer, M., Cabri, L.J., Nickel, E.H., Pabst, A. (1977) New mineral names. American Mineralogist: 62: 593-600.

Dunn, P.J., Chao, G.Y., Fleischer, M., Ferraiolo, J.A., Langley, R.H., Pabst, A., Zilczer, J.A. (1985) New mineral names. American Mineralogist: 70: 214-221.

Majzlan, J., Palatinus, L., Plášil, J. (2016) Crystal structure of Fe2(AsO4)(HAsO4)(OH)(H2O)3, a dehyrdration product of kaňkite. European Journal of Mineralogy: 28: 63-70.

Internet Links for Kaňkite

mindat.org URL:
https://www.mindat.org/min-2153.html
Please feel free to link to this page.

Localities for Kaňkite

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.
Australia
 
  • Tasmania
    • Northern Midlands municipality
      • Rossarden district
R Bottrill, unpub
Austria
 
  • Carinthia
    • Saualpe
      • Bad St Leonhard
        • Kliening
Carinthia II (1999)
  • Styria
    • Birkfeld
      • Gasen
Bojar, H.-P. (2004)
Belgium
 
  • Luxembourg Province
    • Stavelot Massif
      • Vielsalm
        • Grand Halleux
Loeber, A. (2005). "La carrière de Hourt, Grand Halleux, Province de Luxembourg, Belgique." Magazine du 4M, 26(255), 5-7; Dehove, J. and Hubert, F. (2006). "Nouvelles découvertes à Hourt." Magazine du 4M, 27(263), 9-11.
Canada
 
  • Yukon
    • Whitehorse Mining District
      • Carcross
        • Tagish Lake
          • Windy Arm
Gomi, A. (2001) Suisyou (Quartz), 50, #3, 173-180.
China
 
  • Hunan Province
    • Chenzhou Prefecture
      • Yizhang Co.
        • Yaogangxian W-Sn ore field
Ottens, B. (2011): Mineralogical Record 42, 557-603
Czech Republic (TL)
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Kutná Hora (Kuttenberg)
Neues Jahrb.Min.,Mh.(1976) 426-436; Dobešová, B. (2012). Halda Kaňk: hydrogeochemie pórových vod. Masters Thesis MASARYKOVA UNIVERZITA
American Mineralogist (1978) 63: 1284.
    • Karlovy Vary Region
      • Horní Slavkov (Schlaggenwald)
        • Krásno (Schönfeld)
Sejkora, J., Ondruš, P., Fikar, M., Veselovský, F., Mach, Z., Gabašová, A., Skoda, R. & Beran, P. (2006): Supergene minerals at the Huber stock and Schnöd stock deposits, Krásno ore District, the Slavkovský les area, Czech Republic. Journal of the Czech Geological Society 51, 57-101.
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
          • Jáchymov (St Joachimsthal)
Lapis 2002(7/8), 62
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Havlíčkův Brod (Německý Brod; Deutschbrod)
Pauliš P., Kopecký S., Jebavá I.: Nové nálezy supergenní mineralizace v havlíčkobrodském rudním revíru (Česká republika). Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2011, 19, 1, 76-82.
France
 
  • Nouvelle-Aquitaine
    • Haute-Vienne
      • Nantiat
        • Vaulry
          • Vaulry Mines
Patrice Queneau Collection
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Haslach
        • Schnellingen
Wittern: "Mineralfundorte in Deutschland", 2001; Walenta, K. (1994): Neufunde aus dem Schwarzwald, 5. Folge, 2. Teil. Lapis 19 (3), 31-39.
      • Menzenschwand
Lapis 21(12), 39 (1996)
  • Hesse
Schnorrer-Köhler, G. (1991): Mineralogische Notizen V. Aufschluss 42, 155-171.
  • Saxony-Anhalt
    • Harz
      • Stolberg
Gröbner, J., Hajek, W., Junker, R. & Nikoleizig, J. (2011): Neue Mineralschätze des Harzes. Papierflieger Verlag GmbH, Clausthal-Zellerfeld, Germany, 127 pp.
Gröbner, J., W. Hajek, R. Junker & J. Nikoleizig (2011). Neue Mineralienschätze des Harzes. S.89-97. Papierflieger-Verlag, Clausthal-Zellerfeld.
  • Saxony
    • Erzgebirge
      • Freiberg District
        • Brand-Erbisdorf
          • Vereinigt Feld Mine
T. Witzke & M. Hocker (1993): Neue Vorkommen von Bukovskyit, Zykait und Kankit.- Lapis 18(6), 49-50
        • Freiberg
          • Himmelfahrt Mine
Wittern: "Mineralfundorte in Deutschland", 2001
        • Großvoigtsberg
T. Witzke & M. Hocker (1993): Neue Vorkommen von Bukovskyit, Zykait und Kankit.- Lapis 18(6), 49-50
Lapis 30(7/8):78-80 (2005)
      • Schwarzenberg District
        • Langenberg
          • Graul
http://www.dergraul.de
    • Meißen
http://www.mineralienatlas.de/lexikon/index.php/Deutschland/Sachsen/Mei%DFen/Munzig
Germany & Czech Republic
 
  • Erzgebirge; Krusné Hory Mts (Ore Mts)
Pauliš, P. et al.: Nové výskyty nerostů na Sn-W ložisku Cínovec. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2008, vol. 16, 1, 113-117.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
LAPIS 24 (7/8) 1999; Wendel, W. and Markl, G. (1999) Lavrion: Mineralogische Klassiker und Raritäten für Sammler. LAPIS 24 (7/8):34-52
          • Kamariza Mines (Kamareza Mines)
            • Hilarion area
Wendel, W. (2000): Lavrion-News 2000. Lapis 25 (10), 45-47.
        • Lavrion (Laurion; Laurium)
Jason B. Smith.
Hungary
 
  • Pest Co.
    • Börzsöny Mts
      • Nagybörzsöny (Deutsch Pilsen; Deutschpilsen)
GEODA,1996
Italy
 
  • Piedmont
    • Novara Province
      • Armeno
        • Coiromonte
ALBERTINI C. (2014) – Minerali del Vergante e della Valle dell’Agogna. In: Miniere e Minerali del Vergante e Val d’Agogna, GASMA – Arona. (Analyses of the minerals P. Gentile and P. Vignola (UNI Milano)
        • Sovazza
ALBERTINI C. (2014) – Minerali del Vergante e della Valle dell’Agogna. In: Miniere e Minerali del Vergante e Val d’Agogna, GASMA – Arona. (Analyses of the minerals P. Gentile and P. Vignola (UNI Milano), in press.
Japan
 
  • Honshu Island
    • Chubu Region
      • Yamanashi Prefecture
Mineralogical Journal Vol. 12 (1984) , No. 1 pp 6-14
    • Kanto Region
      • Saitama Prefecture
        • Chichibu City
          • Ohtaki-mura
            • Nakatsugawa
Yamada and Matsuyama (1988) Suisyou, 2, 23-29.
    • Kinki region
      • Kyoto Prefecture
        • Fukuchiyama
Miyamoto et al (1995) Chigaku Kenkyu, 44, 105-109.
  • Kyushu Region
    • Oita prefecture
      • Hayami-gun
        • Yamaga
Matsubara, S., Miyawaki, R., Shimizu, M., & Yamanaka, T. (2001). Pararsenolamprite, a new polymorph of native As, from the Mukuno mine, Oita Prefecture, Japan. Mineralogical Magazine, 65(6), 807-812.
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Kaczawskie Mts
      • Radzimowice
        • Stara Góra
          • Stara Góra deposit
1. R. Siuda, 2001 : New sulphate minerals from the Stara Góra oxidised zone, Radzimowice, Kaczawskie Mts., Mineralogical Society of Poland, Special Papers, vol 18, 186-188
    • Rudawy Janowickie Mts
      • Jelenia Góra District
Siuda, R., Gołębiowska, B. (2003): Nowe dane o minerałach wietrzeniowych złoża Miedzianka-Ciechanowice w Rudawach Janowickich (Dolny Śląsk, Polska). Przegląd Geologiczny: 59(3): 226-252 (in Polish)
    • Ząbkowice District
Siuda, R. (2014): Secondary arsenic minerals from old adits in the Złoty Stok area (Sudetes, Poland). Mineralogia Special Papers: 42: 104-105
Slovakia
 
  • Banská Bystrica Region
    • Revúca Co.
      • Chyžné
Martin Števko, unpublished-EMPA-WDS and PXRD confirmed
Spain
 
  • Galicia
    • A Coruña (La Coruña)
      • Santa Comba
DOI: 10.7597/acopios2171-7788.2012.7 Kankita y Kaatialaita de las Minas de Varilongo (Santa Comba, La Coruña, España)
UK
 
  • England
    • Cornwall
      • St Austell District
        • St Stephen-in-Brannel
          • St Stephen
Golley, P. & Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp.
Mineral and/or Locality  
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