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About KlajiteHide

Sándor Klaj
MnCu4(AsO4)2(HAsO4)2 · 9-10H2O
Greenish yellow to yellowish green
2 - 3
Specific Gravity:
3.213 (Calculated)
Crystal System:
Named in 2011 by S. Szakáll, B. Fehér, S. Bigi, and F. Mádai for Sándor Klaj [b. 1948], a Hungarian miner and mineral collector.
Isostructural with:
Klajite forms irregular or sheaf-like aggregates up to 0.5 mm in diameter, which is made up of lath-like to thin tabular crystals, typically 0.05–0.2 mm in length. Twinning was not observed. The mineral is greenish yellow to yellowish green, translucent, with white streak and vitreous luster.

Classification of KlajiteHide

Approval Year:

C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5

2 : (AB)5[HXO4]2[XO4]2.xH2O

Physical Properties of KlajiteHide

Greenish yellow to yellowish green
2 - 3 on Mohs scale
Very brittle
on {010}
3.213 g/cm3 (Calculated)

Optical Data of KlajiteHide

RI values:
nα = 1.595(30) nγ = 1.665(20)
Warning: number_format() expects parameter 1 to be float, string given in /home/mindat/www/show_class.php on line 4148
Max Birefringence:
δ = 0.070
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Colourless to pale green.

Chemical Properties of KlajiteHide

MnCu4(AsO4)2(HAsO4)2 · 9-10H2O
IMA Formula:
MnCu4(AsO4)2(AsO3OH)2 · 9H2O

Crystallography of KlajiteHide

Crystal System:
Class (H-M):
1 - Pinacoidal
Space Group:
Cell Parameters:
a = 6.441(3) Å, b = 7.983(4) Å, c = 10.562(3) Å
α = 85.28(4)°, β = 80.63(5)°, γ = 84.80(4)°
a:b:c = 0.807 : 1 : 1.323
Unit Cell V:
532.4 ų

X-Ray Powder DiffractionHide

Powder Diffraction Data:
10.39 (100)
7.95 (22)
3.956 (27)
3.616 (28)
3.110 (24)
3.050 (28)
2.916 (64)
2.708 (29)

Type Occurrence of KlajiteHide

General Appearance of Type Material:
Irregular or sheaf-like aggregates up to 0.5 mm in diameter, which are made up of lath-like to thin tabular crystals, typically 0.05–0.2 mm in length.
Place of Conservation of Type Material:
Herman Ottó Museum, Miskolc, cat. no. 2010.1, and the Hungarian Natural History Museum, Budapest, specimen no. Gyn./1842
Geological Setting of Type Material:
Secondary mineral in vugs of enargite ore.
Associated Minerals at Type Locality:

Synonyms of KlajiteHide

Relationship of Klajite to other SpeciesHide

Other Members of this group:
Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2OTric.
GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.
OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2OTric. 1 : P1

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.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.40Manganohörnesite(Mn,Mg)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.60KaňkiteFeAsO4 · 3.5H2OMon. 2 : P2
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 2/m : B2/b

Fluorescence of KlajiteHide


Other InformationHide

Insoluble in water.
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 KlajiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Szakáll, S., et al. (2010): Klajite, IMA 2010-004. CNMNC Newsletter, April 2010,p. 377; Mineralogical Magazine 74, 375-377.
Sándor Szakáll, Béla Fehér, Simona Bigi, and Ferenc Mádai (2011): Klajite from Recsk (Hungary), the first Mn-Cu arsenate mineral. Eur. J. Mineral., 23, 829-835.
J. Plášil, A.V. Kasatkin, R. Škoda, P. Škácha (2014): Klajite, MnCu4(AsO4)2(AsO3OH)2(H2O)10, from Jáchymov (Czech Republic): the second world occurrence. Mineral. Mag. 78, 119-129.

Internet Links for KlajiteHide

Localities for KlajiteHide

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.
Czech Republic
  • Karlovy Vary Region
J. Plášil, A.V. Kasatkin, R. Škoda, P. Škácha (2014): Klajite, MnCu4(AsO4)2(AsO3OH)2(H2O)10, from Jáchymov (Czech Republic): the second world occurrence. Mineralogical Magazine 78, 119-129.
Hungary (TL)
  • Heves County
    • Mátra Mts
      • Recsk
CNMNC Newsletter, April 2010,Mineralogical Magazine 74, 377 (2010); Sándor Szakáll, Béla Fehér, Simona Bigi, and Ferenc Mádai (2011): Klajite from Recsk (Hungary), the first Mn-Cu arsenate mineral. Eur. J. Mineral., 23, 829-835.; Szakáll, S., Fehér, B., Bigi, S., & Mádai, F. (2011). Klajite from Recsk (Hungary), the first Mn-Cu arsenate mineral. European Journal of Mineralogy, 23(5), 829-835.
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