Scandiobabingtonite Mineral Data

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General Scandiobabingtonite Information

Chemical Formula:

Ca2(Fe++,Mn)ScSi5O14(OH)

Composition:

Molecular Weight = 562.16 gm

Calcium 14.26 % Ca 19.95 % CaO

Scandium 8.00 % Sc 12.27 % Sc₂O₃

Manganese 2.44 % Mn 3.15 % MnO

Iron 7.45 % Fe 9.59 % FeO

Silicon 24.98 % Si 53.44 % SiO₂

Hydrogen 0.18 % H 1.60 % H₂O

Oxygen 42.69 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Fe²⁺_0.75Mn²⁺_0.25ScSi₅O₁₄(OH)

Environment:

Found in a miarolitic cavity.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Montecatini quarry in the Baveno granite, near Novara, Piedmont, Italy. Link to MinDat.org Location Data.

Name Origin:

The name reflects its composition, as the scandium analogue of babingtonite.

Name Pronunciation:

Scandiobabingtonite + Pronunciation

Synonym:

ICSD 86582

IMA1993-012

Scandiobabingtonite Image

Images:

Scandiobabingtonite

Comments: Green micro crystals of scandiobabingtonite to about 0.75mm with several grayish brown ball-like micro crystals of titanite to 0.75mm scattered in a large vug.
Location: Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway. Scale: Picture size 2.5 mm.
© Tom Loomis / Dakota Matrix

Scandiobabingtonite Crystallography

Axial Ratios:

a:b:c =0.6422:1:0.575

Cell Dimensions:

a = 7.536, b = 11.734, c = 6.748, Z = 2; alpha = 91.7°, beta = 93.86°, gamma = 104.53° V = 576.06 Den(Calc)= 3.24

Crystal System:

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

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

By Intensity(I/I_o): 2.895(1), 2.969(1), 2.755(0.7),

Forms:

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Forms: ( 0 1 0) ( 0 1 0) ( 1 0 1) ( 0 0 1) ( 1 1 0)

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Crystal Structure:

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Orlandi P , Pasero M , Vezzalini G , American Mineralogist , 83 (1998) p.1330-1334, Scandiobabingtonite, a new mineral from the Baveno pegmatite, Piedmont, Italy, Locality: Montecatini granite quarry, near Baveno, Novara, Piedmont, Italy

Physical Properties of Scandiobabingtonite

Color:

Gray.

Density:

3.24

Diaphaneity:

Transparent

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Optical Properties of Scandiobabingtonite

Gladstone-Dale:

CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2149,KPDmeas= 0.2149,KC= 0.2143
Ncalc = 1.69

Optical Data:

Biaxial (+), a=1.686, b=1.694, g=1.709, bire=0.0230

Calculated Properties of Scandiobabingtonite

Electron Density:

Bulk Density (Electron Density)=3.20 gm/cc
note: Specific Gravity of Scandiobabingtonite =3.24 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Scandiobabingtonite}= 6.65 barns/electron
U=PE_{Scandiobabingtonite} x rElectron Density= 21.28 barns/cc.

Radioactivity:

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

Scandiobabingtonite Classification

Dana Class:

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

(65.04)with chains P=5

(65.04.01)Rhodonite group

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

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

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

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

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

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

65.04.01.07 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

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

Strunz Class:

09.DK.05 09 - SILICATES (Germanates)

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

09.DK -Inosilicates with 5-periodic single chains

09.DK.05 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

09.DK.05 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

09.DK.05 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

09.DK.05 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

09.DK.05 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

09.DK.05 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

09.DK.05 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

09.DK.05 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

Other Scandiobabingtonite Information

References:

NAME( CanMin, 8/99) PHYS. PROP.(Am.Min.,Vol.83,p1330-1334,1998) OPTIC PROP.(Am.Min.,Vol.83,p1330-1334,1998)

See Also:

Links to other databases for Scandiobabingtonite :
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

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Scandiobabingtonite

Ca2(Fe++,Mn)ScSi5O14(OH)
Dana No: 65.04.01.08 Strunz No: 09.DK.05
Locality:

Notes: