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Kaňkite

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About KaňkiteHide

Formula:
FeAsO4 · 3.5H2O
Hardness:
2 - 3
Crystal System:
Monoclinic
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 the presence of corrugated sheets (Majzlan et al., 2016).


Classification of KaňkiteHide

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 KaňkiteHide

Hardness:
2 - 3 on Mohs scale

Optical Data of KaňkiteHide

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 KaňkiteHide

Formula:
FeAsO4 · 3.5H2O
IMA Formula:
Fe3+(AsO4) · 3.5H2O

Crystallography of KaňkiteHide

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P2
Setting:
P2
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 V:
2,506.03 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
12.8 Å(100)
7.56 Å(25)
7.22 Å(21)
4.764 Å(34)
4.258 Å(25)
3.697 Å(22b)
2.630 Å(29)

Type Occurrence of KaňkiteHide

Other Language Names for KaňkiteHide

German:Kankit
Spanish:Kankita

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Kaňkite associated with ScoroditeFe3+AsO4 · 2H2O
4 photos of Kaňkite associated with ZýkaiteFe3+4(AsO4)3(SO4)(OH) · 15H2O
1 photo of Kaňkite associated with ArsenopyriteFeAsS

Related Minerals - Nickel-Strunz GroupingHide

8.CE.XBabánekiteCu3(AsO4)2 · 8H2O Mon. 2/m : B2/m
8.CE.05Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2OTric.
8.CE.05GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.
8.CE.10NewberyiteMg(HPO4) · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CE.15BrassiteMg(HAsO4) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CE.20PhosphorrössleriteMg(HPO4) · 7H2OMon. 2/m : P2/b
8.CE.20RößleriteMg(HAsO4) · 7H2OMon. 2/m : B2/b
8.CE.25MetaswitzeriteMn2+3(PO4)2 · 4H2OMon. 2/m : P2/b
8.CE.25SwitzeriteMn2+3(PO4)2 · 7H2OMon.
8.CE.30LindackeriteCuCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2OTric. 1 : P1
8.CE.30VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2OTric. 1 : P1
8.CE.35BobierriteMg3(PO4)2 · 8H2OMon. 2/m : B2/b
8.CE.40AnnabergiteNi3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ArupiteNi3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40Barićite(Mg,Fe)3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ErythriteCo3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40FerrisymplesiteFe3+3(AsO4)2(OH)3 · 5H2O
8.CE.40HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40KöttigiteZn3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ManganohörnesiteMn2+3(AsO4)2 · 8H2OMon. 2/m : P2/m
8.CE.40ParasymplesiteFe2+3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40VivianiteFe2+3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40PakhomovskyiteCo3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.45SymplesiteFe2+3(AsO4)2 · 8H2OTric. 1 : P1
8.CE.50CattiiteMg3(PO4)2 · 22H2OTric. 1 : P1
8.CE.55KoninckiteFe3+PO4 · 3H2OTet.
8.CE.65SteigeriteAl(VO4) · 3H2OMon. 2/m : P21/m
8.CE.70MetaschoderiteAl2(PO4)(VO4) · 6H2OMon. 2/m : P2/m
8.CE.70SchoderiteAl2(PO4)(VO4) · 8H2OMon.
8.CE.75MalhmooditeFeZr(PO4)2 · 4H2OMon.
8.CE.75ZigrasiteMgZr(PO4)2 · 4H2OTric. 1 : P1
8.CE.75Unnamed (Ca-analogue of Zigrasite)CaZr[PO4]2 · 4H2OTric.
8.CE.80SantabarbaraiteFe3+3(PO4)2(OH)3 · 5H2OAmor.
8.CE.85Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)Tric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

40.5.4.1GainesiteNa(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2OTet. 4mm : I41md
40.5.4.2MccrillisiteNaCs(Be,Li)Zr2(PO4)4 · 1-2H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
40.5.4.3SelwyniteNaK(Be,Al)Zr2(PO4)4 · 2H2OTet.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.9.1AngelelliteFe3+4(AsO4)2O3Tric. 1 : P1
20.9.2ScoroditeFe3+AsO4 · 2H2OOrth. mmm (2/m 2/m 2/m)
20.9.4FerrisymplesiteFe3+3(AsO4)2(OH)3 · 5H2O
20.9.5KaatialaiteFe(H2AsO4)3 · 5H2OMon. 2/m
20.9.6SymplesiteFe2+3(AsO4)2 · 8H2OTric. 1 : P1
20.9.7ParasymplesiteFe2+3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.9.8Natropharmacosiderite(Na,K)Fe3+4(AsO4)3(OH)4 · 6-7H2OIso. 4 3m : P4 3m
20.9.9PharmacosideriteKFe3+4(AsO4)3(OH)4 · 6-7H2OIso. 4 3m : P4 3m
20.9.10KolfaniteCa2Fe3+3O2(AsO4)3 · 2H2OMon.
20.9.11ArseniosideriteCa2Fe3+3(AsO4)3O2 · 3H2OMon. 2/m : B2/b
20.9.12YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2OOrth. mm2
20.9.13DussertiteBaFe3+3(AsO4)(AsO3OH)(OH)6Trig. 3m (3 2/m) : R3m
20.9.14Liskeardite[(Al,Fe)32(AsO4)18(OH)42(H2O)22] · 52H2OOrth.
20.9.15MapimiteZn2Fe3+3(AsO4)3(OH)4 · 10H2OMon.
20.9.16OgdensburgiteCa2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
20.9.17WalentaiteFe3+3(P0.84As0.16O4)2(O,OH)6As3+2.56Ca0.42Na0.28Mn2+0.35Fe2+0.30O6.1(OH)0.9(H2O)0.9Orth. mmm (2/m 2/m 2/m) : Imma

Other InformationHide

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 KaňkiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 KaňkiteHide

Localities for KaňkiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Tasmania
    • Northern Midlands municipality
      • Rossarden district
R Bottrill, unpub
Austria
 
  • Carinthia
    • Wolfsberg District
      • Bad Sankt Leonhard im Lavanttal
        • Kliening
Carinthia II (1999)
  • Styria
    • Weiz District
      • Birkfeld
        • Gasen
Bojar, H.-P. (2004)
Canada
 
  • Nova Scotia
    • Halifax Co.
Walker, S.R., Parsons, M.B., Jamieson, H.E., Lanzirotti, A. (2009) Arsenic mineralogy of near-surface tailings and soils: influences on arsenic mobility and bioaccessibility in the Nova Scotia gold mining districts. Canadian Mineralogist: 47: 533-556.
DeSisto, S. (2009) Dynamic Arsenic Cycling in Scorodite-Bearing Hardpan Cements, Montague Gold Mines, Nova Scotia. Master of Science thesis, Queen's University, Ontario, 222 pgs.
  • Yukon
    • Whitehorse mining district
      • Carcross
        • Tagish Lake
          • Windy Arm
Gomi, A. (2001) Suisyou (Quartz), 50, #3, 173-180.
China
 
  • Hunan
    • Chenzhou
      • Yizhang Co.
        • Yaogangxian W-Sn ore field
Ottens, B. (2011): Mineralogical Record 42, 557-603
Czech Republic (TL)
 
  • Central Bohemian Region
    • Kutná Hora District
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
    • Karlovy Vary District
      • Horní Blatná
Roman Gramblička collection
      • Jáchymov
Lapis 2002(7/8), 62
    • Sokolov District
      • Horní Slavkov
        • 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.
  • Vysočina Region
    • Havlíčkův Brod District
      • Havlíčkův Brod
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.
Europe
 
  • Ore Mountains
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.
France
 
  • Nouvelle-Aquitaine
    • Haute-Vienne
      • Nantiat
        • Vaulry
          • Vaulry Mines
Patrice Queneau Collection
Germany
 
  • Baden-Württemberg
    • Freiburg
      • Ortenaukreis
        • Haslach im Kinzigtal
          • Schnellingen
Wittern: "Mineralfundorte in Deutschland", 2001; Walenta, K. (1994): Neufunde aus dem Schwarzwald, 5. Folge, 2. Teil. Lapis 19 (3), 31-39.
      • Waldshut
        • St Blasien
          • 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
    • Erzgebirgskreis
      • Langenberg
        • Graul
http://www.dergraul.de
Lapis 30(7/8):78-80 (2005)
    • Meißen
http://www.mineralienatlas.de/lexikon/index.php/Deutschland/Sachsen/Mei%DFen/Munzig
    • Mittelsachsen
      • 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
      • Großschirma
        • Großvoigtsberg
T. Witzke & M. Hocker (1993): Neue Vorkommen von Bukovskyit, Zykait und Kankit.- Lapis 18(6), 49-50
Ghana
 
  • Western Region
    • Ashanti gold belt
      • Obuasi
Craw, D., & Bowell, R. J. (2014). The characterization of arsenic in mine waste. Reviews in Mineralogy and Geochemistry, 79(1), 473-505.
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • 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.
Jason B. Smith.
Hungary
 
  • Pest County
    • Szob District
      • Nagybörzsöny
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
 
  • Kyoto Prefecture
    • Fukuchiyama City
Miyamoto et al (1995) Chigaku Kenkyu, 44, 105-109.
  • Oita Prefecture
    • Hayami district
      • 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.
  • Saitama Prefecture
    • Chichibu City
      • Ohtaki-mura
        • Nakatsugawa
Yamada and Matsuyama (1988) Suisyou, 2, 23-29.
  • Yamanashi Prefecture
Mineralogical Journal Vol. 12 (1984) , No. 1 pp 6-14
North Macedonia
 
  • Lipkovo Municipality
Đorđević, T., Kolitsch, U., Tasev, G. & Serafimovski, T. (2018): First insights into the mineralogy of the tailings dump of the Lojane Sb-As(-Cr) deposit, FYR of Macedonia. Poster, EGU General Assembly 2018, Vienna, Austria, April 8-13; abstract in Geophysical Research Abstracts 20, 14914.
Poland
 
  • Lower Silesian Voivodeship
    • Jawor County
      • Gmina Bolków
        • Radzimowice
          • 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
    • Jelenia Góra County
      • Gmina Janowice Wielkie
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 Śląskie Co.
      • Gmina Złoty Stok
Siuda, R. (2014): Secondary arsenic minerals from old adits in the Złoty Stok area (Sudetes, Poland). Mineralogia Special Papers: 42: 104-105; Siuda, R. & Macioch, A. (2018): Secondary arsenic minerals from the Złoty Stok As-Au abandoned mine (SW Poland). Geological Quarterly 62, 925-940.
Slovakia
 
  • Banská Bystrica Region
    • Revúca District
      • 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 Stephen-in-Brannel
Golley, P. & Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp.
 
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