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Zincochromite

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Srednyaya Padma U-V deposit, Lake Onega area, Zaonezhskiy Peninsula, Karelia Republic, Northern Region, Russia
© Pavel M. Kartashov

Show Zincochromite Photos (3)
Formula:
ZnCr
 
2
O
 
4
System:IsometricColour:Brown, brownish-grey in ...
Lustre:Sub-MetallicHardness:5½ - 6
Name:Named in allusion to its composition, being the zinc-dominant analogue of chromite.


Spinel Group. The zinc analogue of Chromite.

Classification of Zincochromite

IMA status:Approved 1986
Strunz 8th edition ID:4/B.03-60
Nickel-Strunz 10th (pending) edition ID:4.BB.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
Dana 8th edition ID:7.2.3.6

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:7.14.10

7 : Oxides and Hydroxides
14 : Oxides of Cr
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Type Occurrence of Zincochromite

Type Locality:Onega trough, Karelia Republic, Northern Region, Russia
Year of Discovery:1987

Physical Properties of Zincochromite

Lustre:Sub-Metallic
Colour:Brown, brownish-grey in reflected light.
Hardness (Mohs):5½ - 6

Crystallography of Zincochromite

Crystal System:Isometric
Cell Parameters:a = 8.32Å
Unit Cell Volume:V 575.93 ų (Calculated from Unit Cell)

Optical Data of Zincochromite

Type:Isotropic

Chemical Properties of Zincochromite

Formula:
ZnCr
 
2
O
 
4
Essential elements:Cr, O, Zn
All elements listed in formula:Cr, O, Zn

Relationship of Zincochromite to other Species

Related Minerals - Nickel-Strunz Grouping):
4.BB.05Brunogeierite
(Ge,Fe)Fe
 
2
O
 
4
4.BB.05Chromite
FeCr
 
2
O
 
4
4.BB.05Cochromite
(Co,Ni,Fe)(Cr,Al)
 
2
O
 
4
4.BB.05Coulsonite
FeV
 
2
O
 
4
4.BB.05Cuprospinel
Cu
2+
 
Fe
3+
2
O
 
4
4.BB.05Filipstadite
(Mn,Mg)
 
2
(Sb
 
.5
Fe
 
.5
)O
 
4
4.BB.05Franklinite
Zn
2+
 
Fe
3+
2
O
 
4
4.BB.05Gahnite
ZnAl
 
2
O
 
4
4.BB.05Galaxite
(Mn,Fe,Mg)(Al,Fe)
 
2
O
 
4
4.BB.05Hercynite
FeAl
 
2
O
 
4
4.BB.05Jacobsite
Mn
2+
 
Fe
3+
2
O
 
4
4.BB.05Manganochromite
(Mn,Fe)(Cr,V)
 
2
O
 
4
4.BB.05Magnesiocoulsonite
MgV
 
2
O
 
4
4.BB.05Magnesiochromite
MgCr
 
2
O
 
4
4.BB.05Magnesioferrite
MgFe
3+
2
O
 
4
4.BB.05Magnetite
Fe
2+
 
Fe
3+
2
O
 
4
4.BB.05Nichromite
(Ni,Co,Fe)(Cr,Fe,Al)
 
2
O
 
4
4.BB.05Qandilite
(Mg,Fe)
 
2
(Ti,Fe,Al)O
 
4
4.BB.05Spinel
MgAl
 
2
O
 
4
4.BB.05Trevorite
Ni
2+
 
Fe
3+
2
O
 
4
4.BB.05Ulvöspinel
Fe
 
2
TiO
 
4
4.BB.05Vuorelainenite
(Mn,Fe)(V,Cr)
 
2
O
 
4
4.BB.05Tegengrenite
(Mg,Mn
2+
 
)
 
2
Sb
5+
0.5
(Mn
3+
 
,Si,Ti)
 
0.5
O
 
4
4.BB.10Hausmannite
MnMn
 
2
O
 
4
4.BB.10Hetaerolite
ZnMn
 
2
O
 
4
4.BB.10Hydrohetaerolite
ZnMn
 
2
O
 
4
·H
 
2
O
4.BB.10Iwakiite
Mn(Fe,Mn)
 
2
O
 
4
4.BB.15Maghemite
Fe
 
2
O
 
3
4.BB.15Titanomaghemite
Fe
3+
 
(Fe
3+
 
,Ti
4+
 
,Fe
2+
 
,[])
 
2
O
 
4
Related Minerals - Hey's Index Grouping:
7.14.1Eskolaite
Cr
 
2
O
 
3
7.14.2Bracewellite
CrO(OH)
7.14.3Grimaldiite
CrO(OH)
7.14.4Guyanaite
CrO(OH)
7.14.5Yimengite
K(Cr,Ti,Fe,Mg)
 
12
O
 
19
7.14.6Mathiasite
K(Ti,Cr,Fe,Mg,Zr)
 
21
O
 
38
7.14.7Mcconnellite
CuCrO
 
2
7.14.8Redledgeite
Ba
 
x
([Cr,Fe,V]
3+
2x
Ti
 
8-2x
)O
 
16
7.14.9Hawthorneite
BaMgTi
 
3
Cr
 
4
Fe
 
4
O
 
19
7.14.11Wattersite
(Hg-Hg)
2+
2
Hg
2+
 
[O
 
2
|CrO
 
4
]
7.14.12Chromite
FeCr
 
2
O
 
4
7.14.13Magnesiochromite
MgCr
 
2
O
 
4
7.14.14 Donathite

Other Names for Zincochromite

Synonyms:
IMA1986-015
German names:
ZincochromitZinkochromit
Russian names:
Цинкохромит
Spanish names:
Zincochromita

Other Information

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 Zincochromite

Reference List:Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1987): 116: 367-371.

American Mineralogist (1988): 73: 931-932.

Internet Links for Zincochromite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Zincochromite details from Handbook of Mineralogy (PDF)
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    Localities for Zincochromite

    (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
     
    • New South Wales
      • Young Co.
    		www.minerals.nsw.gov.au/minfo/62_elinforc.html.
    Russia
     
    • Northern Region
      • Karelia Republic
    		No reference listed
        • Zaonezhskiy Peninsula
          • Lake Onega area
    		[MinRec 32:212]
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