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Makarochkinite

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Pit No. 400, Lake Ishkul', Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', 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', 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):Translucent on thin edges, 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
(Ca,Na)
 
2
(Be,Al)[Si
 
2
O
 
6
(F,OH)]
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
Mg
 
5
Mn
 
12
As
 
2
Si
 
12
O
 
43
(OH)
 
6
9.DH.75Agrellite
NaCa
 
2
[F|Si
 
4
O
 
10
]

Other Names for Makarochkinite

Synonyms:
IMA2002-009a
German names:
Makarochkinit
Russian names:
Макарочкинит
Spanish names:
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
      • Chelyabinsk Oblast'
        • Ilmen Mts
          • Ilmen Natural Reserve
            • Lake Ishkul'
    		Am. Min. 90:1402-1412 (2005)
      • Southern Urals
        • Chelyabinsk Oblast'
          • Ilmeny (Ilmen; Ilmenskie) Mts
    		http://un2sg4.unige.ch/athena
    Mineral and/or Locality
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