Mineralogy Database

Gageite-2M Mineral Data

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General Gageite-2M Information

Help on Chemical  Formula: Chemical Formula: (Mn,Mg,Zn)42Si16O54(OH)40
Help on Composition: Composition: Molecular Weight = 3,958.95 gm
   Magnesium   7.74 %  Mg   12.83 % MgO
   Manganese  34.97 %  Mn   45.15 % MnO
   Zinc        6.94 %  Zn    8.63 % ZnO
   Silicon    11.35 %  Si   24.28 % SiO2
   Hydrogen    1.02 %  H     9.10 % H2O
   Oxygen     37.99 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+25.2Mg12.6Zn4.2Si16O54(OH)40
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1911
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Robert B. Gage, of Trenton, New Jersey, USA, who analyzed the first specimens.
Help on Name Pronunciation: Name Pronunciation: Gageite-2M Say GAGEITE-2M

Gageite-2M Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1:1:0.5066
Help on Cell Dimensions: Cell Dimensions: a = 19.42, b = 19.42, c = 9.84, Z = 2; beta = 89.5° V = 3,710.88 Den(Calc)= 3.54
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.87(1), 2.707(0.8), 2.758(0.8),

Physical Properties of Gageite-2M

Help on Color: Color: Colorless, Pink.
Help on Density: Density: 3.58
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Gageite-2M

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2053,KPDmeas= 0.203,KC= 0.2097
Ncalc = 1.74 - 1.75
Help on Optical Data: Optical Data: Biaxial (-), a=1.72, b=1.73, g=1.73, bire=0.0100, 2V(Calc)=0, 2V(Meas)=20-50. Dispersion relatively strong.

Calculated Properties of Gageite-2M

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.44 gm/cc
note: Specific Gravity of Gageite-2M =3.54 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGageite-2M = 12.95 barns/electron
U=PEGageite-2M x rElectron Density= 44.52 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gageite-2M is Not Radioactive

Gageite-2M Classification

Help on  Dana Class: Dana Class: (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.03)with chains P=4
  (65.03.02)Gageite group Balangeroite (Mg,Fe,Fe,Mn)42Si16O54(OH)40 P 2/n 2/m Gageite-2M (Mn,Mg,Zn)42Si16O54(OH)40 P 2/n 2/m Gageite (Mn,Mg,Zn)42Si16O54(OH)40 P1 1
Help on  Strunz Class: Strunz Class: 09.DH.35 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DH -Inosilicates with 4-periodic single chains, Si4O12
09.DH.35 Balangeroite (Mg,Fe,Fe,Mn)42Si16O54(OH)40 P 2/n 2/m
09.DH.35 Gageite-2M (Mn,Mg,Zn)42Si16O54(OH)40 P 2/n 2/m
09.DH.35 Gageite (Mn,Mg,Zn)42Si16O54(OH)40 P1 1

Other Gageite-2M Information

Help on References: References: PHYS. PROP.(Am.Min.,Vol.72,p382-391,1987) OPTIC PROP.(Dana)
Help on See Also: See Also: Links to other databases for Gageite-2M :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: Strunz No: 09.DH.35





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