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Makarochkinite

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Pit No. 400, Lake Ishkul', Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia
© 2008, JGW

Formula:
Ca
 
2
Fe
2+
4
Fe
3+
 
Ti[O
 
2
|BeAlSi
 
4
O
 
18
]
System:TriclinicColour:black
Hardness:5½ - 6
Name:Named after Russian Uralian mineralogist Boris A. Makarochkin (1908-1988).


Aenigmatite Group.

Classification of Makarochkinite

IMA status:Approved 2003
Strunz 8th edition ID:8/F.14-45
Nickel-Strunz 10th (pending) edition ID:9.DH.40

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
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Type Occurrence of Makarochkinite

Type Locality:Pit No. 400, Lake Ishkul', Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia
General Appearance of Type Material:equant masses, 5-50 mm across
Geological Setting of type material:granitic pegmatite
Associated Minerals at type locality:
TitaniteSamarskite-(Y)PhenakiteMagnetiteIlmenite
HastingsiteColumbite-(Fe)Ferro-edeniteFergusonite-(Y)Danalite
Biotite

Physical Properties of Makarochkinite

Lustre:Vitreous
Diaphaneity (Transparency):Opaque
Colour:black
Hardness (Mohs):5½ - 6
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (measured):3.93 g/cm3
Density (calculated):3.933 g/cm3

Crystallography of Makarochkinite

Crystal System:Triclinic
Class (H-M):1 - Pedial
Space Group:P1
Cell Parameters:a = 10.355Å, b = 10.751Å, c = 8.873Å
α = 105.707°, β = 96.227°, γ = 124.861°
Ratio:a:b:c = 0.963 : 1 : 0.825
Unit Cell Volume:V 735.7 ų
Z:2
Twinning:absent
X-Ray Powder Diffraction:
d-spacingIntensity
7.997 (57)
4.779 (29)
3.120 (32)
2.924 (69)
2.676 (77)
2.530 (100)
2.410 (28)
Comments:Format: d-spacing/Å (I) (hkl)

Optical Data of Makarochkinite

Type:Biaxial
RI values: nα = 1.821 - 1.849 nγ = 1.850 - 1.880
Maximum Birefringence:δ = 0.029 - 0.031

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Pleochroism:Visible
Comments:X = greenish brown, Y = yellowish brown, Z = reddish brown; Y ≤ X < Z

Chemical Properties of Makarochkinite

Formula:
Ca
 
2
Fe
2+
4
Fe
3+
 
Ti[O
 
2
|BeAlSi
 
4
O
 
18
]
Essential elements:Ca, Fe, O, Si
All elements listed in formula:Al, Be, Ca, Fe, O, Si, Ti
Common Impurities:Na,Mn,Mg

Relationship of Makarochkinite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DH.05Leucophanite
NaCaBeSi
 
2
O
 
6
F
9.DH.10Ohmilite
Sr
 
3
(Ti,Fe
3+
 
)[(O,OH)|(Si
 
2
O
 
6
)
 
2
] · 2-3H
 
2
O
9.DH.15Haradaite
SrVSi
 
2
O
 
7
9.DH.15Suzukiite
BaVSi
 
2
O
 
7
9.DH.20Batisite
Na
 
2
BaTi
 
2
[O|Si
 
2
O
 
6
]
 
2
9.DH.20Shcherbakovite
Na(K,Ba)
 
2
(Ti,Nb)
 
2
[O|Si
 
2
O
 
6
]
 
2
9.DH.25Taikanite
Sr
 
3
BaMn
2+
2
[O|Si
 
2
O
 
6
]
 
2
9.DH.30Krauskopfite
BaSi
 
2
O
 
5
·3H
 
2
O
9.DH.35Balangeroite
(Mg,Fe,Fe,Mn)
 
42
Si
 
16
O
 
54
(OH)
 
40
9.DH.35Gageite
Mn
 
21
O
 
3
(Si
 
4
O
 
12
)
 
2
(OH)
 
20
9.DH.40Aenigmatite
Na
 
2
Fe
2+
5
TiO
 
2
(Si
 
6
O
 
18
)
9.DH.40Dorrite
Ca
 
2
(Mg,Fe
2+
 
)
 
2
Fe
3+
4
[O
 
2
|Al
 
4
Si
 
2
O
 
18
]
9.DH.40Høgtuvaite
(Ca,Na)
 
2
(Fe
2+
 
,Fe
3+
 
,Ti)
 
6
[O
 
2
|Be(Si,Al)
 
5
O
 
18
]
9.DH.40Krinovite
Na
 
2
Mg
 
4
Cr
3+
2
[O
 
2
|Si
 
6
O
 
18
]
9.DH.40Rhönite
Ca
 
2
(Mg,Fe
2+
 
,Fe
3+
 
,Ti)
 
6
[O
 
2
|(Si,Al)
 
6
O
 
18
]
9.DH.40Serendibite
(Ca,Na)
 
2
(Mg,Fe
2+
 
)
 
3
(Al,Fe
3+
 
)
 
3
[O
 
2
|(Si,Al,B)
 
6
O
 
18
]
9.DH.40Welshite
Ca
 
4
Mg
 
9
Sb
 
3
O
 
4
[Si
 
6
Be
 
3
AlFe
 
2
O
 
36
]
9.DH.40Wilkinsonite
Na
 
2
Fe
2+
4
Fe
3+
2
[O
 
2
|Si
 
6
O
 
18
]
9.DH.45Sapphirine
(Mg,Fe)
 
4-x
Al
 
4+x
[Al
 
4+x
Si
 
2-x
O
 
18
]O
 
2
9.DH.50Khmaralite
(Mg,Al,Fe)
 
16
[(Al,Si,Be)
 
12
O
 
36
]O
 
4
9.DH.55Surinamite
(Mg,Fe)
 
3
Al
 
4
BeSi
 
3
O
 
16
9.DH.60Deerite
(Fe,Mn)
 
6
(Fe,Al)
 
3
Si
 
6
O
 
20
(OH)
 
5
9.DH.65Howieite
Na(Fe,Mn)
 
10
(Fe,Al)
 
2
Si
 
12
O
 
31
(OH)
 
13
9.DH.65Taneyamalite
(Na,Ca)(Mn,Mg,Fe)
 
12
Si
 
12
(O,OH)
 
44
9.DH.70Johninnesite
Na
 
2
Mn
2+
9
Mg
 
7
(OH)
 
8
[AsO
 
4
]
 
2
[Si
 
6
O
 
17
]
 
2
9.DH.75Agrellite
NaCa
 
2
[F|Si
 
4
O
 
10
]

Other Names for Makarochkinite

Synonyms:
IMA2002-009a
Other Languages:
German:Makarochkinit
Russian:Макарочкинит
Spanish:Makarochkinita

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 Makarochkinite

Reference List:Grew et al (2005), Am.Min.: 90: 1402-1412).

Internet Links for Makarochkinite

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    Localities for Makarochkinite

    (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.
    Russia
     
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
          • Ilmen Mts
    		http://un2sg4.unige.ch/athena
              • Lake Ishkul'
    		Am. Min. 90:1402-1412 (2005); Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 31st Oct 2009 15:28:16