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Lazarenkoite

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Big Photo

Khovu-Aksy Ni-Co Deposit, Tuva Republic, Eastern-Siberian Region, Russia
© Thomas Witzke




Formula:
(Ca,Fe
2+
 
)Fe
3+
 
As
3+
3
O
 
7
 · 3H
 
2
O
System:OrthorhombicColour:Bright orange
Hardness:1
Name:
In honour of Academician Evgenii Konstantinovich Lazarenko (1912–1979), mineralogist, Lvov University, Lvov, Ukraine.
This page provides mineralogical data about Lazarenkoite.

Classification of Lazarenkoite

IMA status:Approved
Strunz 8th edition ID:4/J.08-20
Nickel-Strunz 10th (pending) edition ID:4.JC.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
C : Arsenites, antimonites, bismuthites; without additional anions, with H2O
Dana 8th edition ID:7.8.3.1

7 : MULTIPLE OXIDES
8 : AB3X7
Hey's CIM Ref.:23.20

23 : Arsenites
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Type Occurrence of Lazarenkoite

Type Locality:Khovu-Aksy Ni-Co Deposit, Tuva Republic, Eastern-Siberian Region, Russia
General Appearance of Type Material:Fibrous incrustations.
Year of Discovery:1981
Geological Setting of type material:In oxidation zone of a cobalt-nickel ore deposit, where it is an oxidation product of skutterudite (smaltine) and löllingite.
Associated Minerals at type locality:
SkutteruditeLöllingiteAnnabergite

Physical Properties of Lazarenkoite

Lustre:Resinous, Silky
Colour:Bright orange
Hardness (Mohs):1
Density (measured):3.45(5) g/cm3

Crystallography of Lazarenkoite

Crystal System:Orthorhombic
Cell Parameters:a = 21.80Å, b = 12.64Å, c = 8.40Å
Ratio:a:b:c = 1.725 : 1 : 0.665
Unit Cell Volume:V 2,314.64 ų (Calculated from Unit Cell)
Z:10
Comment:Orthorhombic-pseudohexagonal; point group not determined.
X-Ray Powder Diffraction:
d-spacingIntensity
11.2 (9)
8.40 (10)
6.55 (8)
4.66 (9)
3.31 (4)
3.20 (4)
3.135 (4)

Optical Data of Lazarenkoite

Type:Biaxial (-)
RI values: nα = 1.820(3) nβ = 1.920(3) nγ = 1.955(3)
2V:Measured: 30° , Calculated: 58°
Birefringence:0.135
Maximum Birefringence:δ = 0.135

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:small
Pleochroism:Strong
Comments:X = pale yellow; Y = pale brown; Z = rose-brown

Chemical Properties of Lazarenkoite

Formula:
(Ca,Fe
2+
 
)Fe
3+
 
As
3+
3
O
 
7
 · 3H
 
2
O
Essential elements:As, Ca, Fe, H, O
All elements listed in formula:As, Ca, Fe, H, O
Analytical Data:Average of two analyses; Khovu-Aksy Ni-Co Deposit, Russia.
Fe2O3 (16.7)
FeO (5.6)
MgO (0.7)
CaO (5.1)
As2O3 (61.5)
H2O (12.2)
Total (101.8)
Empirical Formula:
(Ca
 
0.44
Fe
2+
0.38
Mg
 
0.09
)Fe
3+
1.02
As
3+
3.04
O
 
7
 · 3.32H
 
2
O

Relationship of Lazarenkoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JC.05Cafarsite
Ca
 
8
(Ti,Fe,Fe,Mn)
 
6-7
(AsO
 
3
)
 
12
 · 4H
 
2
O
4.JC.15Rouseite
Pb
 
2
Mn
2+
 
[AsO
 
3
]
 
2
 · 2H
 
2
O
4.JC.20Vajdakite
[(Mo
6+
 
O
 
2
)
 
2
(H
 
2
O)
 
2
As
3+
2
O
 
5
] · 3H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
23.2Nanlingite
NaMg
 
4
(AsO
 
3
)
 
2
F
 
4
23.3Leiteite
Zn(As
 
2
O
 
4
)
23.5Kuznetsovite
(Hg
+
2
)Hg
2+
 
(AsO
 
4
)Cl
23.6Paulmooreite
Pb
 
2
[As
 
2
O
 
5
]
23.7Ecdemite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
23.8Heliophyllite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
23.9Finnemanite
Pb
 
5
(AsO
 
3
)
 
3
Cl
23.10Gebhardite
Pb
 
8
(As
 
2
O
 
5
)
 
2
OCl
 
6
23.11Zimbabweite
(Na,K)
 
2
PbAs
 
4
(Ta,Nb,Ti)
 
4
O
 
18
23.13Rouseite
Pb
 
2
Mn
2+
 
[AsO
 
3
]
 
2
 · 2H
 
2
O
23.14Freedite
Cu
+
 
Pb
 
8
(AsO
 
3
)
 
2
O
 
3
Cl
 
5
23.15Manganarsite
Mn
 
3
(As
 
2
O
 
4
)(OH)
 
4
23.17Armangite
Mn
2+
26
(AsO
 
3
)
 
14
(HAsO
 
3
)
 
4
(CO
 
3
)
23.18Karibibite
Fe
 
2
As
 
4
O
 
9
23.19Schneiderhöhnite
Fe
2+
 
Fe
3+
3
[As
 
5
O
 
13
]
23.21Stenhuggarite
CaFeSb(AsO
 
3
)
 
2
O
23.22Tomichite
(V,Fe)
 
4
Ti
 
3
AsO
 
13
(OH)

Other Names for Lazarenkoite

Synonyms:
IMA1980-076
Other Languages:
German:Lazarenkoit
Spanish:Lazarenkoita

Other Information

Other Information:Insoluble in water, but easily dissolved in dilute, cold HCl.
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 Lazarenkoite

Reference List:

- +
Yakhontova, L.K. and Plosina, I.I. (1981): The new mineral lazarenkoite. Mineral. Zhurnal, 3(3), 92–96 (in Russian with English abs.).

American Mineralogist (1982): 67: 415. (Abs.)

Yakhontova, L.K., I.A. Poroshina, and I.I. Plyunina (1983): Structural model of lazarenkoite according to refractometric analysis data. Probl. Kristallokhim. Genezisa Miner., 145–148 (in Russian).

Internet Links for Lazarenkoite

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    • Localities for Lazarenkoite

    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.
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    (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.
    Germany
     
    • Lower Saxony
      • Harz
        • Bad Harzburg
    		No reference listed
    Russia
     
    • Eastern-Siberian Region
      • Tuva Republic
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Switzerland
     
    • Wallis (Valais)
      • Anniviers Valley
        • Saint-Luc
    		Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
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