Hardystonite Mineral Data + Say HARDYSTONITE

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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: Metamorphosed zinc deposits.
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 Synonym: Synonym: ICSD 18114
  PDF 35-745
 

Hardystonite Image

Click Here for Larger Hardystonite Image in a New Browser Window Images:
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Hardystonite   Esperite   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 - ScalenohedralH-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),
Click Here for Large Hardystonite Structure Window Crystal Structure:

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Bindi L , Bonazzi P , Rothlisberger F , American Mineralogist , 86 (2001) p.747-751, Hardystonite from Franklin Furnace: A natural modulated melilite

View Additional jPOWD Structure files for Hardystonite
[1]
 

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 Diaphaniety: Diaphaniety: 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: Non-fluorescent.
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
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:

relectron=3.34 gm/cc
note: rHardystonite =3.40 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01742
Boson Index = 0.98258
Help on Photoelectric: Photoelectric:

PEHardystonite = 14.02 barns/electron
U=PEHardystonite x relectron= 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: 55.4.2.2 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions
  (55.4)with cations in [8] and lower coordination
  (55.4.2)Fresnoite group
 
55.4.2.1 Fresnoite Ba2TiSi2O8 P 4bm 4mm
 
55.4.2.2 Hardystonite Ca2ZnSi2O7 P 421m 4 2m
 
55.4.2.3 Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 2221 2 2 2
 
55.4.2.4 Leucophanite (Na,Ca)2BeSi2(O,OH,F)7 P1 1
 
55.4.2.5 Meliphanite (Ca,Na)2Be[(Si,Al)2O6(F,OH)] I 4 4
 
55.4.2.6 Gugiaite Ca2BeSi2O7 P 421m 4 2m
Help on  Strunz Class: Strunz Class: VIII/C.02-40 VIII - Silicates
  VIII/C - Sorosilicates, with [Si2O7]6-, without anions unfamiliar to tetraheders
  VIII/C.02 - Melilite group
 
VIII/C.02-10 Akermanite Ca2MgSi2O7 P 421m 4 2m
 
VIII/C.02-14 Okayamalite! Ca2B2SiO7 P 421m 4 2m
 
VIII/C.02-15 Gehlenite Ca2Al(AlSi)O7 P 421m 4 2m
 
VIII/C.02-30 Gugiaite Ca2BeSi2O7 P 421m 4 2m
 
VIII/C.02-40 Hardystonite Ca2ZnSi2O7 P 421m 4 2m
 
VIII/C.02-50 Leucophanite (Na,Ca)2BeSi2(O,OH,F)7 P1 1
 
VIII/C.02-60 Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 2221 2 2 2
 
VIII/C.02-70 Meliphanite (Ca,Na)2Be[(Si,Al)2O6(F,OH)] I 4 4
 
VIII/C.02-80 Barylite BaBe2Si2O7 Pn21a mm2
 
VIII/C.02-85 Clinobarylite! BaBe2Si2O7 Pmn2 2/m 2/m 2/m
 
VIII/C.02-90 Andremeyerite BaFe(Fe,Mn,Mg)Si2O7 P 21/c 2/m
 

Other Hardystonite 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 Hardystonite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - EUROmin Project 5 - Franklin Minerals(Dunn) 6 - Franklin Minerals(Palache) 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (MinSocAm) 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 -QUT Mineral Atlas 16 - WWW-MINCRYST 17 -École des Mines de Paris

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

Hardystonite

Ca2ZnSi2O7
Dana No: 55.4.2.2 Strunz No: VIII/C.02-40
Locality:

 

Notes:

 

 
   
 
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