Mineralogy Database

Jerrygibbsite Mineral Data

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General Jerrygibbsite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Zn)9(SiO4)4(OH)2
Help on Composition: Composition: Molecular Weight = 902.02 gm
   Manganese  51.77 %  Mn   66.85 % MnO
   Zinc        3.62 %  Zn    4.51 % ZnO
   Silicon    12.45 %  Si   26.64 % SiO2
   Hydrogen    0.22 %  H     2.00 % H2O
   Oxygen     31.93 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+8.5Zn0.5(SiO4)4(OH)2
Help on Environment: Environment: Metamorphosed Zn-Mn deposit. Dimorphous with sonolite.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Franklin mine, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Gerald V. Gibbs (1929-), Virginia Polytechnic Institute, Blacksburg, Virginia, USA.
Help on Name Pronunciation: Name Pronunciation: Jerrygibbsite + Pronunciation Say JERRYGIBBSITE
Help on Synonym: Synonym: ICSD 67041
  PDF 38-352

Jerrygibbsite Image

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Comments: Pale pink interlocking anhedral jerrygibbsite grains associated with black zincite and franklinite. Co-type specimen.
Location: Parker Shaft, Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA. Scale: See Image.
© Rruff Database

Jerrygibbsite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4532:1:2.6327
Help on Cell Dimensions: Cell Dimensions: a = 4.85, b = 10.7, c = 28.17, Z = 4; V = 1,461.88 Den(Calc)= 4.10
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pbn21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.806(1), 2.557(1), 2.869(0.78),

Physical Properties of Jerrygibbsite

Help on Cleavage: Cleavage: {001} Imperfect
Help on Color: Color: Violet pink.
Help on Density: Density: 4
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light pink

Optical Properties of Jerrygibbsite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1906,KPDmeas= 0.1953,KC= 0.201
Ncalc = 1.8 - 1.82
Help on Optical Data: Optical Data: Biaxial (-), a=1.772, b=1.783, g=1.789, bire=0.0170, 2V(Calc)=72, 2V(Meas)=72. Dispersion r > v moderate.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.

Calculated Properties of Jerrygibbsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.81 gm/cc
note: Specific Gravity of Jerrygibbsite =4.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0074559734
Boson Index = 0.9925440266
Help on Photoelectric: Photoelectric: PEJerrygibbsite = 15.73 barns/electron
U=PEJerrygibbsite x rElectron Density= 59.93 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jerrygibbsite is Not Radioactive

Jerrygibbsite Classification

Help on  Dana Class: Dana Class: 52.03.02d.02 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.03)with cations in [6] coordination only
  (52.03.02d)Humite group (Clinohumite series)
52.03.02d.01 Clinohumite (Mg,Fe)9(SiO4)4(F,OH)2 P 21/c 2/m
52.03.02d.02 Jerrygibbsite (Mn,Zn)9(SiO4)4(OH)2 Pbn21 mm2
52.03.02d.03 Sonolite Mn9(SiO4)4(OH,F)2 P 21/a 2/m
52.03.02d.04 Hydroxylclinohumite! Mg9(SiO4)4(OH,F)2 P 21/c 2/m
Help on  Strunz Class: Strunz Class: 09.AF.70 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AF -Nesosilicates with additional anions;
09.AF.70 Jerrygibbsite (Mn,Zn)9(SiO4)4(OH)2 Pbn21 mm2

Other Jerrygibbsite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Jerrygibbsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: 52.03.02d.02 Strunz No: 09.AF.70





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