Mineralogy Database

Hardystonite Mineral Data

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General Hardystonite Information

Help on Chemical  Formula: Chemical Formula: Ca2ZnSi2O7
Help on Composition: Composition: Molecular Weight = 313.71 gm
   Calcium  25.55 %  Ca   35.75 % CaO
   Zinc     20.84 %  Zn   25.94 % ZnO
   Silicon  17.91 %  Si   38.31 % SiO2
   Oxygen   35.70 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2ZnSi2O7
Help on Environment: Environment: Found in granular ore in a metamorphosed stratiform zinc deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1899
Help on Locality: Locality: Franklin, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Hardyston Township in which Franklin is situated.
Help on Name Pronunciation: Name Pronunciation: Hardystonite + Pronunciation Say HARDYSTONITE
Help on Synonym: Synonym: ICSD 18114
  PDF 35-745
 

Hardystonite Image

Click Here for Larger   Image in a New Browser Window Images:
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  Esperite   Hardystonite   Franklinite

Comments: Pale brown porcelaneous esperite with pinkish gray hardystonite and black franklinite.
Location: Franklin, Sussex County, New Jersey. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hardystonite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.6408
Help on Cell Dimensions: Cell Dimensions: a = 7.823, c = 5.013, Z = 2; V = 306.79 Den(Calc)= 3.40
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: P 421m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.868(1), 3.085(0.6), 3.711(0.5),
 

Physical Properties of Hardystonite

Help on Cleavage: Cleavage: {100} Perfect, {110} Fair
Help on Color: Color: White, Light brown, Pink.
Help on Density: Density: 3.4
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luminescence: Luminescence: Fluorescent, Short UV=dark purple, Long UV=intense violet-blue.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Hardystonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.196,KPDmeas= 0.196,KC= 0.1957
Ncalc = 1.67
Help on Optical Data: Optical Data: Uniaxial (-), e=1.661, w=1.672, bire=0.0110.
 

Calculated Properties of Hardystonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.34 gm/cc
note: Specific Gravity of Hardystonite =3.40 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHardystonite = 14.02 barns/electron
U=PEHardystonite x rElectron Density= 46.81 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hardystonite is Not Radioactive
 

Hardystonite Classification

Help on  Dana Class: Dana Class: 55.04.02.02 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions
  (55.04)with cations in [8] and lower coordination
  (55.04.02)Fresnoite group
 
55.04.02.01 Fresnoite Ba2TiSi2O8 P 4bm 4mm
 
55.04.02.02 Hardystonite Ca2ZnSi2O7 P 421m 4 2m
 
55.04.02.03 Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 2221 2 2 2
 
55.04.02.04 Leucophanite (Na,Ca)2BeSi2(O,OH,F)7 P1 1
 
55.04.02.05 Meliphanite (Ca,Na)2Be[(Si,Al)2O6(F,OH)] I 4 4
 
55.04.02.06 Gugiaite Ca2BeSi2O7 P 421m 4 2m
Help on  Strunz Class: Strunz Class: 09.BB.10 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BB -Si2O7 groups, without non-tetrahedral anions;
 
09.BB.10 Akermanite Ca2MgSi2O7 P 421m 4 2m
 
09.BB.10 Cebollite Ca5Al2(SiO4)3(OH)4 Unk Ortho
 
09.BB.10 Gugiaite Ca2BeSi2O7 P 421m 4 2m
 
09.BB.10 Gehlenite Ca2Al(AlSi)O7 P 421m 4 2m
 
09.BB.10 Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 2221 2 2 2
 
09.BB.10 Hardystonite Ca2ZnSi2O7 P 421m 4 2m
 
09.BB.10 Melilite (Ca,Na)2(Al,Mg,Fe)(Si,Al)2O7 P 421m 4 2m
 
09.BB.10 Okayamalite! Ca2B2SiO7 P 421m 4 2m
 

Other Hardystonite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Hardystonite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - Franklin Minerals(Palache)
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST

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Print or Cut-and-Paste your Hardystonite Specimen Label here :

Hardystonite

Ca2ZnSi2O7
Dana No: 55.04.02.02 Strunz No: 09.BB.10
Locality:

 

Notes:

 

 
   
 


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