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Melkovite

Big Photo

U-Mo occurrence, Shunak Mt, Mointy Railway Station, Mointy (Moyynty), Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast'), Kazakhstan
© P.M. Kartashov

Show Melkovite Photos (2)
Formula:
CaFeH
 
6
(MoO
 
4
)
 
4
PO
 
4
·6H
 
2
O or near·
Hardness:3
This page provides mineralogical data about Melkovite.

Classification of Melkovite

IMA status:Approved
Strunz 8th edition ID:7/C.33-10
Nickel-Strunz 10th (pending) edition ID:8.DM.15

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
M : With large and medium-sized cations, (OH, etc.):RO4 > 2:1
Dana 8th edition ID:49.4.3.1

49 : HYDRATED MOLYBDATES AND TUNGSTATES
4 : Compound Molybdates and Tungstates
Hey's CIM Ref.:22.5.11

22 : Phosphates, Arsenates or Vanadates with other Anions
5 : Phosphates, arsenates or vanadates with chromate, molybdate, niobate or tantalate
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Type Occurrence of Melkovite

Type Locality:U-Mo occurrence, Shunak Mt, Mointy Railway Station, Mointy (Moyynty), Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast'), Kazakhstan
Year of Discovery:1968

Physical Properties of Melkovite

Hardness (Mohs):3

Optical Data of Melkovite

Type:Biaxial
Dispersion:strong

Chemical Properties of Melkovite

Formula:
CaFeH
 
6
(MoO
 
4
)
 
4
PO
 
4
·6H
 
2
O or near·
Essential elements:Ca, Fe, H, Mo, O, P
All elements listed in formula:Ca, Fe, H, Mo, O, P

Relationship of Melkovite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.DM.05Morinite
Na
 
2
Ca
 
4
Al
 
4
[(F,OH)
 
5
|(PO
 
4
)
 
2
]
 
2
 · 3H
 
2
O
8.DM.05Esperanzaite
NaCa
 
2
Al
 
2
[F
 
4
|OH|(AsO
 
4
)
 
2
] · 2H
 
2
O
8.DM.10Clinotyrolite
Ca
 
2
Cu
 
9
[(OH,O)
 
10
|(AsO
 
4
,SO
 
4
)
 
4
] · 10H
 
2
O
8.DM.10Tyrolite
Ca
 
2
Cu
 
9
[(OH)
 
4
|(H
 
2
O)
 
11
|CO
 
3
|(AsO
 
4
)
 
4
] · 0-1H
 
2
O
8.DM.15Betpakdalite
{Mg(H
 
2
O)
 
6
}Ca
 
2
(H
 
2
O)
 
13
[Mo
6+
8
As
5+
2
Fe
3+
3
O
 
36
(OH)](H
 
2
O)
 
4
8.DM.15Natrobetpakdalite
(Na
 
2
,Ca)Fe
 
2
(As
 
2
Mo
 
6
O
 
28
)·15H
 
2
O
8.DM.20Phosphovanadylite
(Ba,Ca,K,Na)x[(V,Al)4P2(O,OH)16]·12(H2O) x~0.66
8.DM.25Yukonite
Ca
 
3
Fe
3+
 
[(OH)
 
3
|(AsO
 
4
)
 
2
] · 5H
 
2
O
8.DM.30Uduminelite
Ca
 
3
Al
 
8
(PO
 
4
)
 
2
O
 
12
·2H
 
2
O
8.DM.35Delvauxite
CaFe
 
4
(PO
 
4
,SO
 
4
)
 
2
(OH)
 
8
·4-6H
 
2
O not confirmed·
8.DM.40Santafeite
(Ca,Sr,Na)
 
12
(Mn
2+
 
,Fe
3+
 
,Al,Mg)
 
8
Mn
4+
8
(VO
 
4
)
 
16
(OH,O)
 
20
 · 8H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
22.5.1Vauquelinite
Pb
 
2
Cu[OH|PO
 
4
|CrO
 
4
]
22.5.2Embreyite
Pb
 
5
[PO
 
4
|CrO
 
4
]
 
2
 · H
 
2
O
22.5.3Cassedanneite
Pb
 
5
[VO
 
4
|CrO
 
4
]
 
2
 · H
 
2
O
22.5.4Fornacite
Pb
 
2
Cu[OH|(AsO
 
4
,PO
 
4
)|CrO
 
4
]
22.5.5Molybdofornacite
Pb
 
2
Cu[OH|(AsO
 
4
,PO
 
4
)|(MoO
 
4
,CrO
 
4
)]
22.5.6Mendozavilite
Na(Ca,Mg)
 
2
[Fe
 
6
(PO
 
4
)
 
2
(PMo
 
11
O
 
39
)(OH,Cl)
 
10
]·33H
 
2
O
22.5.7Paramendozavilite
NaAl
 
4
[Fe
 
7
(PO
 
4
)
 
5
(PMo
 
12
O
 
40
)(OH)
 
16
]·56H
 
2
O
22.5.8Betpakdalite
{Mg(H
 
2
O)
 
6
}Ca
 
2
(H
 
2
O)
 
13
[Mo
6+
8
As
5+
2
Fe
3+
3
O
 
36
(OH)](H
 
2
O)
 
4
22.5.9Natrobetpakdalite
(Na
 
2
,Ca)Fe
 
2
(As
 
2
Mo
 
6
O
 
28
)·15H
 
2
O
22.5.10Obradovicite
H
 
4
(K,Na)CuFe
 
2
AsO
 
4
(MoO
 
4
)
 
5
·12H
 
2
O
22.5.12Rankachite
(V
4+
 
,V
5+
 
)(W
6+
 
,Fe
3+
 
)
 
2
O
 
8
(OH)•(Ca
 
x
H
 
2
O
 
y
) with x ~ 0.5, y ~ 2.
22.5.13Olmsteadite
KFe
2+
2
(Nb
5+
 
,Ta
5+
 
)[O|PO
 
4
]
 
2
 · 2H
 
2
O
22.5.14Johnwalkite
K(Mn
2+
 
,Fe
2+
 
,Fe
3+
 
)
 
2
(Nb
5+
 
,Ta
5+
 
)[O|PO
 
4
]
 
2
 · 2(H
 
2
O,OH)

Other Names for Melkovite

Synonyms:
IMA1968-033
Other Languages:
German:Melkovit
Spanish:Melkovita

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 Melkovite

Reference List:American Mineralogist (1970): 55: 320.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 98(2): 207-212.

Articles/Blogs about Melkovite

Internet Links for Melkovite

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

    (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.
    Kazakhstan
     
    • Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast')
      • Mointy (Moyynty)
        • Mointy Railway Station
          • Shunak Mt
    Mineral and/or Locality
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