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Heidornite Mineral Data

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General Heidornite Information

Help on Chemical  Formula: Chemical Formula: Na2Ca3B5O8(SO4)2Cl(OH)2
Help on Composition: Composition: Molecular Weight = 609.85 gm
   Sodium     7.54 %  Na   10.16 % Na2O
   Calcium   19.72 %  Ca   27.59 % CaO
   Boron      8.86 %  B    28.54 % B2O3
   Hydrogen   0.33 %  H     2.95 % H2O
   Sulfur    10.52 %  S    26.26 % SO3
   Chlorine   5.81 %  Cl    5.81 % Cl
               -   %   Cl   -1.31 % -O=Cl2   
   Oxygen    47.22 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Ca3B5O8(SO4)2Cl(OH)2
Help on Environment: Environment: Drill core at 1,968 m associated with glauberite in a cavity in the Upper Anhydrite zone.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Zechstein formation, on the German-Dutch border. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for F. Heidorn, German geologist who studied the Zechstein deposits.
Help on Name Pronunciation: Name Pronunciation: Heidornite + Pronunciation Say HEIDORNITE
Help on Synonym: Synonym: ICSD 24458
  PDF 25-805

Heidornite Image

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Comments: Colorless crystals of heidornite.
Location: Niedersachswerfen, Nordhausen, Erfurt district, Harz Mts, Thuringia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Heidornite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3022:1:2.3966
Help on Cell Dimensions: Cell Dimensions: a = 10.21, b = 7.84, c = 18.79, Z = 4; beta = 93.33° V = 1,501.53 Den(Calc)= 2.70
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c

Physical Properties of Heidornite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Colorless.
Help on Density: Density: 2.753
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Heidornite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2186,KPDmeas= 0.2144,KC= 0.2135
Ncalc = 1.58 - 1.59
Help on Optical Data: Optical Data: Biaxial (+), a=1.579, b=1.588, g=1.604, bire=0.0250, 2V(Calc)=76, 2V(Meas)=63-77.

Calculated Properties of Heidornite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.73 gm/cc
note: Specific Gravity of Heidornite =2.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHeidornite = 3.67 barns/electron
U=PEHeidornite x rElectron Density= 10.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Heidornite is Not Radioactive

Heidornite Classification

Help on  Dana Class: Dana Class: (32)Compound Sulfates
  (32.03)(anhydrous) with poly-anionic formula
  (32.03.05)Dana Group Heidornite Na2Ca3B5O8(SO4)2Cl(OH)2 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 06.EC.30 06 - BORATES
  06.E - Pentaborates
  06.EC -Phyllo-pentaborates
06.EC.30 Heidornite Na2Ca3B5O8(SO4)2Cl(OH)2 C 2/c 2/m

Other Heidornite Information

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

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Dana No: Strunz No: 06.EC.30





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