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Euchroite

This page kindly sponsored by Tomas Bancik
Big Photo

Svätodušná deposit, Ľubietová, Banská Bystrica Co., Banská Bystrica Region, Slovakia
© fabreminerals.com

Show Euchroite Photos (110)



Formula:
Cu
 
2
(AsO
 
4
)(OH) · 3H
 
2
O
System:OrthorhombicColour:Bright emerald-green, ...
Hardness:3½ - 4
Name:From the Greek for "beautiful colour."


A rare secondary copper arsenate.

May be pseudomorphed by olivenite.

Classification of Euchroite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/D.07-30
Nickel-Strunz 10th (pending) edition ID:8.DC.07

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
Dana 8th edition ID:42.6.3.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq·xH2O
Hey's CIM Ref.:20.1.8

20 : Arsenates (also arsenates with phosphate, but without other anions)
1 : Arsenates of Cu
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Type Occurrence of Euchroite

Type Locality:Svätodušná deposit, Ľubietová, Banská Bystrica Co., Banská Bystrica Region, Slovakia
General Appearance of Type Material:Crystals lining crevices in mica schist.
Year of Discovery:1823
Associated Minerals at type locality:
Olivenite

Physical Properties of Euchroite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Bright emerald-green, leek-green; bright bluish green in transmitted light.
Hardness (Mohs):3½ - 4
Tenacity:Brittle
Cleavage:Poor/Indistinct
On {101} and {110}, in traces.
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):3.44 g/cm3
Density (calculated):3.45 g/cm3

Crystallography of Euchroite

Crystal System:Orthorhombic
Class (H-M):2 2 2 - Disphenoidal
Space Group:P21 21 21
Cell Parameters:a = 10.07Å, b = 10.52Å, c = 6.12Å
Ratio:a:b:c = 0.957 : 1 : 0.582
Unit Cell Volume:V 648.33 ų (Calculated from Unit Cell)
Z:4
Morphology:Crystals short prismatic [010] to equant; also thick tabular {100}, rare. Faces m s l striated [010]. Crystals normally holohedral in appearance.

Optical Data of Euchroite

Type:Biaxial (+)
RI values: nα = 1.695 nβ = 1.698 nγ = 1.733
2V:Measured: 28° to 30°, Calculated: 34°
Maximum Birefringence:δ = 0.038

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:relatively weak
Pleochroism:Weak

Chemical Properties of Euchroite

Formula:
Cu
 
2
(AsO
 
4
)(OH) · 3H
 
2
O
Essential elements:As, Cu, H, O
All elements listed in formula:As, Cu, H, O

Relationship of Euchroite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.DC.05Nissonite
Cu
 
2
Mg
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 5H
 
2
O
8.DC.10Legrandite
Zn
 
2
(AsO
 
4
)(OH) · H
 
2
O
8.DC.12Strashimirite
Cu
 
8
(AsO
 
4
)
 
4
(OH)
 
4
 · 5H
 
2
O
8.DC.15Arthurite
CuFe
3+
2
(AsO
 
4
,PO
 
4
,SO
 
4
)
 
2
(OH,O)
 
2
 · 4H
 
2
O
8.DC.15Earlshannonite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Ojuelaite
ZnFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Whitmoreite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Cobaltarthurite
(Co,Mg)Fe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Bendadaite
Fe
2+
 
Fe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Kunatite
CuFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15UKI-2006-(PO:FeHZn)
ZnFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15UKI-2006-(PO:AlCuFeH)
Fe
2+
 
Al
 
3
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.17Kleemanite
ZnAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 3H
 
2
O
8.DC.20Bermanite
Mn
2+
 
Mn
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.20Coralloite
Mn
2+
 
Mn
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.22Kovdorskite
Mg
 
2
(PO
 
4
)(OH) · 3H
 
2
O
8.DC.25Ferristrunzite
Fe
3+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.DC.25Ferrostrunzite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 6H
 
2
O
8.DC.25Metavauxite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.25Strunzite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 6H
 
2
O
8.DC.27Beraunite
Fe
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
5
 · 4H
 
2
O
8.DC.30Gordonite
MgAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Laueite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Mangangordonite
Mn
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Paravauxite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Pseudolaueite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Sigloite
Fe
3+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
3
 · 7H
 
2
O
8.DC.30Stewartite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Ushkovite
MgFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Ferrolaueite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Kastningite
(Mn
2+
 
,Fe
2+
 
,Mg)Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Maghrebite
MgAl
 
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Nordgauite
MnAl
 
2
(PO
 
4
)
 
2
(F,OH)
 
2
 · 5H
 
2
O
8.DC.32Tinticite
Fe
3+
5.34
(PO
 
4
)
 
3.62
(VO
 
4
)
 
0.38
(OH)
 
4
 · 6.7H
 
2
O
8.DC.35Vauxite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 6H
 
2
O
8.DC.37Vantasselite
Al
 
4
(PO
 
4
)
 
3
(OH)
 
3
 · 9H
 
2
O
8.DC.40Cacoxenite
Fe
3+
24
Al(PO
 
4
)
 
17
O
 
6
(OH)
 
12
 · 17H
 
2
O
8.DC.45Gormanite
(Fe
2+
 
,Mg)
 
3
(Al,Fe
3+
 
)
 
4
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
8.DC.45Souzalite
(Mg,Fe
2+
 
)
 
3
(Al,Fe
3+
 
)
 
4
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
8.DC.47Kingite
Al
 
3
(PO
 
4
)
 
2
(OH)
 
3
 · 9H
 
2
O
8.DC.50Wavellite
Al
 
3
(PO
 
4
)
 
2
(OH,F)
 
3
 · 5H
 
2
O
8.DC.50Allanpringite
Fe
3+
3
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.DC.52Kribergite
Al
 
5
(PO
 
4
)
 
3
(SO
 
4
)(OH)
 
4
 · 4H
 
2
O
8.DC.55Mapimite
Zn
 
2
Fe
3+
3
(AsO
 
4
)
 
3
(OH)
 
4
 · 10H
 
2
O
8.DC.57Ogdensburgite
Ca
 
2
Fe
3+
4
(Zn,Mn
2+
 
)(AsO
 
4
)
 
4
(OH)
 
6
 · 6H
 
2
O
8.DC.60Nevadaite
(Cu
2+
 
,Al,V
3+
 
)
 
6
Al
 
8
(PO
 
4
)
 
8
F
 
8
(OH)
 
2
 · 22H
 
2
O
8.DC.60Cloncurryite
(Cu,VO)Al
 
2
(PO
 
4
)
 
2
(F,OH)
 
2
 · 4.5-5H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
20.1.1Lammerite
Cu
 
3
(AsO
 
4
)
 
2
20.1.2Olivenite
Cu
 
2
(AsO
 
4
)(OH)
20.1.3Clinoclase
Cu
 
3
(AsO
 
4
)(OH)
 
3
20.1.4Cornwallite
Cu
 
5
(AsO
 
4
)
 
2
(OH)
 
4
20.1.5Cornubite
Cu
 
5
(AsO
 
4
)
 
2
(OH)
 
4
20.1.6Chlorotile (of Frenzel)
20.1.7Geminite
Cu(HAsO
 
4
) · H
 
2
O
20.1.9Strashimirite
Cu
 
8
(AsO
 
4
)
 
4
(OH)
 
4
 · 5H
 
2
O
20.1.10Arhbarite
Cu
 
2
Mg(AsO
 
4
)(OH)
 
3
20.1.11Lindackerite
CuCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 8-9H
 
2
O
20.1.12Conichalcite
CaCu(AsO
 
4
)(OH)
20.1.13Liroconite
Cu
 
2
Al(AsO
 
4
)(OH)
 
4
 · 4H
 
2
O
20.1.14Ceruleite
Cu
 
2
Al
 
7
(AsO
 
4
)
 
4
(OH)
 
13
 · 11.5H
 
2
O
20.1.15Chenevixite
Cu
 
2
Fe
3+
2
(AsO
 
4
)
 
2
(OH)
 
4
20.1.16Arthurite
CuFe
3+
2
(AsO
 
4
,PO
 
4
,SO
 
4
)
 
2
(OH,O)
 
2
 · 4H
 
2
O

Other Names for Euchroite

Other Languages:
Catalan:Eucroita
Dutch:Euchroïet
French:Euchroïte
German:Euchroit
Italian:Eucroite
Russian:Эвхроит
Slovak:Euchroit
Spanish:Euchroita

Other Information

Fluorescence in UV light:Non-fluorescent.
Other Information:Soluble in acids.
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 Euchroite

Reference List:

- +
Breithaupt, A. (1823) Vollständige Characteristik etc., 1st. ed.: 172, 266.

Haidinger, W. (1825): Ueber den Euchroit, eine neue Mineralspecies. 1. Vorläufige Notiz über dieses Mineral. J. Chem. Phys. (Schweigger), 45, 231-232.

Haidinger (1825) Annalen der Physik, Halle, Leipzig: 5: 165.

Haidinger (1825) Ed. J. Sc.: 2: 133.

Grailich and Lang (1857) Konigliche Akademie der Wissenschaften, Vienna, Sitzber.: 27: 47.

Des Cloizeaux (1859): 2: 30.

Dana, J.D. (1868) System of Mineralogy, 5th. Edition, New York: 566.

Church (1895) Mineralogical Magazine: 11: 1.

Goldschmidt, V. (1916) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 3: 157.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 73.

Hintze, Carl (1931) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [4B]: 876.

Acta Crystallographica: C45: 1479-1482.

Acta Crystallographica: 21: 437-440.

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.: 934-935.

Giuseppetti, G. (1963) La struttura cristallina dell'Eucroite Cu2(AsO)(OH)*3(H2O). Periodico di Mineralogia – Roma, 131-156.

Papp, G. (2004): History of Minerals, Rocks and Fossil Resins Discovered in the Carpathian Region. Studia Naturale 14, Hungarian Natural History Museum, Budapest, Hungary, 215 pp.

Internet Links for Euchroite

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  • Raman and XRD data at RRUFF project
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  • Euchroite details from Handbook of Mineralogy (PDF)
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    • Localities for Euchroite

    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
     
    • South Australia
      • Olary Province
        • Kalabity homestead area
    		No reference listed
    Austria
     
    • Salzburg
      • Saalfelden
        • Leogang
          • Hütten
            • Schwarzleograben
              • Inschlag Alp
    		C.L. Lengauer, G. Giester, E. Kirchner: Mineralogy and Petrology 81:187-201 (2004)
              • Schwarzleo District
    		C.L. Lengauer, G. Giester, E. Kirchner: Mineralogy and Petrology 81:187-201 (2004)
    Poeverlein, R. (2008): Euchroit und seine Begleiter vom prähistorischen Bergbau, Leogang, Österreich. Lapis, 33 (5), 13-22.
    • Tyrol
      • North Tyrol
        • Inn valley
          • Wörgl
            • Wildschönau
              • Thierbach
    		R. Poeverlein, J. Gröbner & U. Kolitsch (2010): Mineralien und Bergbau vom Graschberg bei Thierbach in der Tiroler Wildschönau. Lapis 35 (3), 35-40; 54 (in German).
    R. Poeverlein, J. Gröbner & U. Kolitsch (2010): Mineralien und Bergbau vom Graschberg bei Thierbach in der Tiroler Wildschönau. Lapis 35 (3), 35-40; 54 (in German).
        • Stanz valley
          • Flirsch
    		J. Gröbner, U. Kolitsch, R. Poeverlein & M. Strasser (2009): Ein ungewöhnliches Fahlerzvorkommen bei der Flirscher Schihütte im Stanzer Tal, Tirol. Lapis 34, 13-19; 58.
    Bulgaria
     
    • Sofiya Oblast (Sofia Oblast)
      • Svoge Obshchina
        • Bov
    		Mincheva-Stefanova, I. (1968): Strashimirite, a new hydrous copper arsenate. Zap. Vses. Mineral. Obshch. 97, 470-477 (in Russian). [Abstract in Am. Mineral. 54 (1969) 1221]; Lapis 23(4), 9 (1998)
    Chile
     
    • Antofagasta Region
      • Antofagasta Province
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Hradec Králové Region
        • Náchod (Nachod)
    		Černý, P., Doubek, Z., Veselovský, F.: Nerosty z Bělovsi u Náchoda – Jiráskova lomu. Minerál, roč. 11, č. 6, s. 406-418.
    France
     
    • Rhône-Alpes
      • Rhône
        • Le Bois d'Oingt
          • Chessy-les-Mines
    		Lapis 23(4), 9 (1998)
    Germany
     
    • Rhineland-Palatinate
      • Siegerland
        • Betzdorf
          • Schutzbach
    		Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
    		No reference listed
    Italy
     
    • Sardinia
      • Medio Campidano Province
        • Arbus
    		Preite, D., & Zuanel, A. (2007). Montevecchio: storia, miniere e minerali. Rivista Mineralogica Italiana, 31 (4), 230-246.
    Romania
     
    • Caras-Severin Co.
      • Banat Mts
        • Moldova Nouă-Sasca Cu-Mo ore field
    		www.minerals-of-the-carpathians,2009
    Slovakia
     
    • Banská Bystrica Region
      • Banská Bystrica Co.
        • Ľubietová
    		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: 935; Pauliš, P., Ďuďa, R. (2002) Nejzajímavejší mineralogická naletište Slovenska. Kuttna,K.Hora, 136p
        • Poniky
    		Števko M., Sejkora J., Bačík P., 2011: Mineralogy and origin of supergene mineralization at the Farbište ore occurrence near Poniky, central Slovakia. Journal of Geosciences, 57, 3, 273-298.
    Spain
     
    • Asturias
      • Salas
        • Carlés
    		JRGL collection
    Switzerland
     
    • Glarus
      • Murg Valley
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 155.
    USA
     
    • Montana
      • Missoula Co.
    		Lapis 23(4), 9 (1998)
    • Nevada
      • Eureka Co.
        • Lynn District
    		AIME Pacific Southwest Mineral Industry Conference 1977
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Ogdensburg
            • Sterling Hill
    		Dunn(1995):Pt5:667.
    Mineral and/or Locality
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