Harstigite Mineral Data

Harstigite Mineral Data
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General Harstigite Information

Help on Chemical Formula: Chemical Formula: Ca6MnBe4(SiO4)2(Si2O7)2(OH)2
Help on Composition: Composition: Molecular Weight = 885.97 gm
   Calcium    27.14 %  Ca   37.98 % CaO
   Manganese   6.20 %  Mn    8.01 % MnO
   Beryllium   4.07 %  Be   11.29 % BeO
   Silicon    19.02 %  Si   40.69 % SiO2
   Hydrogen    0.23 %  H     2.03 % H2O
   Oxygen     43.34 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca6Mn2+Be4(SiO4)2(Si2O7)2(OH)2
Help on Environment: Environment: Occurs with garnet and rhodonite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1886
Help on Locality: Locality: Harstig mine, Pajsberg, near Persber, Vermland, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Harstigite + Pronunciation Say HARSTIGITE
Help on Synonym: Synonym: ICSD 64790
  PDF 20-200
 

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Harstigite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0205:1:0.7107
Help on Cell Dimensions: Cell Dimensions: a = 13.9, b = 13.62, c = 9.68, Z = 4; V = 1,832.60 Den(Calc)= 3.21
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcmn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.695(1), 2.788(0.5), 2.817(0.5),
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Hesse K F , Stumpel G , Zeitschrift fur Kristallographie , 177 (1986) p.143-148, Crystal structure of harstigite, MnCa6Be4[SiO4]2[Si2O7]2(OH)2, Locality: Harstigen mine, Sweden

 

Physical Properties of Harstigite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White.
Help on Density: Density: 3.16
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Harstigite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2119,KPDmeas= 0.2153,KC= 0.2142
Ncalc = 1.68 - 1.69
Help on Optical Data: Optical Data: Biaxial (+), a=1.678, b=1.68, g=1.683, bire=0.0050, 2V(Calc)=80, 2V(Meas)=52.
 

Calculated Properties of Harstigite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.13 gm/cc
note: Specific Gravity of Harstigite =3.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEHarstigite = 5.67 barns/electron
U=PEHarstigite x rElectron Density= 17.75 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Harstigite is Not Radioactive
 

Harstigite Classification
Help on Dana Class: Dana Class: 57.01.01.02 (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups
  (57.01)with [Si3O10] groups
  (57.01.01)Aminoffite and related species
 
57.01.01.01 Aminoffite Ca3Be2Si3O10(OH)2 I 4/mmm 4/m 2/m 2/m
 
57.01.01.02 Harstigite Ca6MnBe4(SiO4)2(Si2O7)2(OH)2 Pcmn 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 09.BF.05 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BF -Sorosilicates with mixed SiO4 and Si2O7 groups;
 
09.BF.05 Harstigite Ca6MnBe4(SiO4)2(Si2O7)2(OH)2 Pcmn 2/m 2/m 2/m
 

Other Harstigite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Harstigite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Harstigite

Ca6MnBe4(SiO4)2(Si2O7)2(OH)2
Dana No: 57.01.01.02 Strunz No: 09.BF.05
Locality:

 

Notes: