Makarochkinite Mineral Data

General Makarochkinite Information

Chemical Formula:

Ca2Fe++4Fe+++TiSi4BeAlO20

Composition:

Molecular Weight = 871.54 gm

Sodium 0.66 % Na 0.89 % Na₂O

Calcium 7.54 % Ca 10.55 % CaO

Magnesium 0.70 % Mg 1.16 % MgO

Tantalum 0.15 % Ta 0.18 % Ta₂O₅

Titanium 3.35 % Ti 5.59 % TiO₂

Manganese 0.82 % Mn 1.06 % MnO

Beryllium 0.94 % Be 2.61 % BeO

Niobium 0.41 % Nb 0.58 % Nb₂O₅

Aluminum 1.67 % Al 3.16 % Al₂O₃

Iron 32.62 % Fe 29.92 % FeO / 13.38 % Fe₂O₃

Silicon 14.44 % Si 30.89 % SiO₂

Oxygen 36.72 % O

______ ______

100.00 % 99.96 % = TOTAL OXIDE

Empirical Formula:

Ca_1.64Na_0.25Mn²⁺_0.11Fe²⁺_3.56Fe³⁺_1.46Ti_0.61Mg_0.25Mn²⁺_0.02Nb_0.03Ta_0.007Si_4.48Be_0.91 Al_0.54Fe²⁺_0.07O₁₈O₂

Environment:

Occurs in a granitic pegmatite near Lake Ishkul. Aenigmatite group. Ti analog of hogtuvaite.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Ilmen Mountains (Southern Urals), Ilmen State Reserve, Chelyabinsk Oblast, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Boris A. Makarochkin (1907-1988), Russian chemist and mineralogist, who studied the rare minerals from the Ilmen Mountains and collected the mineral, but described it as a n amphibole

Synonym:

ICSD 39333

IMA2002-009a

PDF 85-1123

Makarochkinite Image

Images:

Makarochkinite

Comments: Black grain of makarochkinite on matrix.
Location: Pit No. 400, Lake Ishkul', Ilmen Mts, Chelyabinsk Oblast', Urals Region, Russia. Scale: Specimen Size 0.5 cm x 0.5 cm.
© Carlo Guidarin

Makarochkinite Crystallography

Axial Ratios:

a:b:c =0.9631:1:0.8253

Cell Dimensions:

a = 10.355, b = 10.751, c = 8.873, Z = 2; alpha = 105.707°, beta = 96.227°, gamma = 124.861° V = 775.66 Den(Calc)= 3.73

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.53(1)(213), 2.676(0.77)(203 ), 2.924(0.69)(013 ), 7.997(0.57)(100 ), 2.075(0.39)(411 ), 3.12(0.32)(012 ), 4.779(0.29)(011 ), 2.41(0.28)(223 ),

Physical Properties of Makarochkinite

Cleavage:

None

Color:

Black.

Density:

3.93

Diaphaneity:

Subopaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Equant Grains - Granular material with equel dimensions in x, y, and z.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Optical Properties of Makarochkinite

Gladstone-Dale:

CI meas= 0.072 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.072 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2111,KPDmeas= 0.2111,KC= 0.2275
Ncalc = 1.89

Optical Data:

Biaxial (?), a=1.799, g=1.86, bire=0.0610

Calculated Properties of Makarochkinite

Electron Density:

Bulk Density (Electron Density)=3.81 gm/cc
note: Specific Gravity of Makarochkinite =3.93 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Makarochkinite}= 14.25 barns/electron
U=PE_{Makarochkinite} x rElectron Density= 54.37 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Makarochkinite is Not Radioactive

Makarochkinite Classification

Dana Class:

69.02.01a.09 (69)Inosilicate Chains with Side Branches or Loops

(69.02)with P>2

(69.02.01a)Aenigmatite and related species (Aenigmatite subgroup)

69.02.01a.01 Aenigmatite (Na,Ca)4(Fe,Ti,Mg)12Si12O40 P1 1

69.02.01a.02 Dorrite Ca2Mg2Fe4(Al,Fe)4Si2O20 P1,P 1 Tri

69.02.01a.03 Hogtuvaite (Ca,Na)2(Fe,Fe,Ti,Mg,Mn)6(Si,Be,Al)6O20 P1 1

69.02.01a.04 Krinovite NaMg2CrSi3O10 P1 1

69.02.01a.05 Rhonite Ca2(Mg,Fe,Fe,Ti)6(Si,Al)6O20 P1 1

69.02.01a.06 Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 P1 1

69.02.01a.07 Welshite Ca4Mg9Sb3O4[Si6Be3AlFe2O36] P1 1

69.02.01a.08 Wilkinsonite Na2Fe4Fe2Si6O20 P1 1

69.02.01a.09 Makarochkinite! Ca2Fe4FeTiSi4BeAlO20 P1 1

Strunz Class:

09.DH.45 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DH -Inosilicates with 4-periodic single chains, Si4O12

09.DH.45 Aenigmatite (Na,Ca)4(Fe,Ti,Mg)12Si12O40 P1 1

09.DH.45 Dorrite Ca2Mg2Fe4(Al,Fe)4Si2O20 P1,P 1 Tri

09.DH.45 Krinovite NaMg2CrSi3O10 P1 1

09.DH.45 Rhonite Ca2(Mg,Fe,Fe,Ti)6(Si,Al)6O20 P1 1

09.DH.45 Sapphirine (Mg,Al)8(Al,Si)6O20 P1 1

09.DH.45 Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 P1 1

09.DH.45 Khmaralite! (Mg,Al,Fe)16(Al,Si,Be)12O40 P 2₁/c 2/m

09.DH.45 Makarochkinite! Ca2Fe4FeTiSi4BeAlO20 P1 1

09.DH.45 Welshite Ca4Mg9Sb3O4[Si6Be3AlFe2O36] P1 1

09.DH.45 Wilkinsonite Na2Fe4Fe2Si6O20 P1 1

Other Makarochkinite Information

References:

NAME( AmMin, v90, p1402) PHYS. PROP.(AmMin, v90, p1402) OPTIC PROP.(AmMin, v90, p1402)

See Also:

Links to other databases for Makarochkinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - WWW-MINCRYST

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Makarochkinite

Ca2Fe++4Fe+++TiSi4BeAlO20
Dana No: 69.02.01a.09 Strunz No: 09.DH.45
Locality:

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