Manganbabingtonite Mineral Data

Manganbabingtonite Mineral Data +

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General Manganbabingtonite Information

Chemical Formula:

Ca2(Mn,Fe++)Fe+++Si5O14(OH)

Composition:

Molecular Weight = 572.59 gm

Calcium 14.00 % Ca 19.59 % CaO

Manganese 7.20 % Mn 9.29 % MnO

Iron 12.19 % Fe 3.14 % FeO / 13.94 % Fe₂O₃

Silicon 24.52 % Si 52.47 % SiO₂

Hydrogen 0.18 % H 1.57 % H₂O

Oxygen 41.91 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Mn²⁺_0.75Fe²⁺_0.25Fe³⁺Si₅O₁₄(OH)

Environment:

In thin stringers in amphibolized garnet-pyroxene-magnetite skarn associated with an iron deposit. Forms a series with babingtonite.

IMA Status:

Approved IMA 1967

Locality:

Rudnyi Kaskad deposit, Sayan, Russia Link to MinDat.org Location Data.

Name Origin:

Named for the manganese content and relation to babingtonite.

Manganbabingtonite Image

Images:

Manganbabingtonite

Comments: Brownish black manganbabingtonite associated with pink Inesite blades.
Location: Hubei, China. Scale: 8 x 5.7 cm.
© Fabre Minerals

Manganbabingtonite Crystallography

Axial Ratios:

a:b:c =0.5895:1:0.5784

Cell Dimensions:

a = 6.91, b = 11.72, c = 6.78, Z = 2; alpha = 90.37°, beta = 93.75°, gamma = 104.8° V = 529.72 Den(Calc)= 3.59

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.938(1), 2.998(1), 3.1(1),

Physical Properties of Manganbabingtonite

Cleavage:

[001] Perfect, [110] Indistinct

Color:

Black, Brownish black.

Density:

3.45

Diaphaniety:

Subtranslucent

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

brownish

Optical Properties of Manganbabingtonite

Gladstone-Dale:

CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2035,KPDmeas= 0.2118,KC= 0.2178

Optical Data:

Biaxial (+), a=1.716, b=1.73, g=1.746, bire=0.0300, 2V(Calc)=88, 2V(Meas)=78-82. Dispersion r >> v strong.

Pleochroism (x):

emerald green or emerald green.

Pleochroism (y):

faint rose or colorless.

Pleochroism (z):

purple brown or rose brown.

Calculated Properties of Manganbabingtonite

Electron Density:

r_electron=3.40 gm/cc
note: r_{Manganbabingtonite}=3.45 gm/cc.

Fermion Index

Fermion Index = 0.01442
Boson Index = 0.98558

Photoelectric:

PE_{Manganbabingtonite}= 8.09 barns/electron
U=PE_{Manganbabingtonite} x r_electron= 27.52 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Manganbabingtonite is Not Radioactive

Manganbabingtonite Classification

Dana Class:

65.4.1.3 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.4)with chains P=5

(65.4.1)Rhodonite group

65.4.1.1 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

65.4.1.2 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

65.4.1.3 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

65.4.1.4 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

65.4.1.5 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

65.4.1.6 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

65.4.1.7 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

65.4.1.8 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

Strunz Class:

VIII/F.27-30 VIII - Silicates

VIII/F - Inosilicates (chain and band) Five chains [Si5O15]10-

VIII/F.27 - Rhodonite - Inesite series

VIII/F.27-10 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

VIII/F.27-20 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

VIII/F.27-30 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

VIII/F.27-35 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

VIII/F.27-40 Santaclaraite CaMn4Si5O14(OH)2·(H2O) P1 1

VIII/F.27-50 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

VIII/F.27-60 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

VIII/F.27-70 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

VIII/F.27-80 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

VIII/F.27-90 Inesite Ca2Mn7Si10O28(OH)2·5(H2O) P1 1

Other Manganbabingtonite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)

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Manganbabingtonite

Ca2(Mn,Fe++)Fe+++Si5O14(OH)
Dana No: 65.4.1.3 Strunz No: VIII/F.27-30
Locality:

Notes: