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Reidite Mineral Data

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General Reidite Information

Help on Chemical  Formula: Chemical Formula: ZrSiO4
Help on Composition: Composition: Molecular Weight = 183.31 gm
   Zirconium  49.77 %  Zr   67.22 % ZrO2
   Silicon    15.32 %  Si   32.78 % SiO2
   Oxygen     34.91 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zr(SiO4)
Help on Environment: Environment: Inclusions in shocked zircon grains with a scheelite-type structure. Pressures of 30 GPa to 53 GPa are required for this transition.
Help on IMA Status: IMA Status: Approved IMA 2001 (Dana # Added)
Help on Locality: Locality: Ejecta from the Chesapeake Bay impact structure (Eocene), found in upper Eocene sediments in the continental slope off New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Alan F. Reid who first produced this high pressure phase in the laboratory.
Help on Synonym: Synonym: IMA2001-013

Reidite Image

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Comments: Scanning electron microscope photomicrograph of the surface of an etched shocked zircon with a skeletal crystalline phase that may be reidite. X-ray diffraction data indicate that this zircon contains minor amounts of reidite. (AmMin 87:563).
Location: Found in an upper Eocene impact ejecta layer in marine sediments on the upper continental slope off New Jersey and on Barbados. Scale: See Image.
© American Mineralogist

Reidite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.21739
Help on Cell Dimensions: Cell Dimensions: a = 4.738, c = 10.506, Z = 4; V = 235.85 Den(Calc)= 5.16
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 41/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.81(1)(112), 1.755(0.6)(204), 1.437(0.5)(132),2.065(0.5)(211), 1.55(0.45)(116), 3.29(0.4), 4.3(0.4)(101), 1.805(0.3)(213),

Physical Properties of Reidite

Help on Cleavage: Cleavage: None
Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Irregular - Very brittle fracture producing irregular fragments
Help on Habit: Habit: Epitaxial - Crystallographic alignment with a precursor mineral
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white

Optical Properties of Reidite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.403 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1255,KC= 0.21
Ncalc = 2.08
Help on Optical Data: Optical Data: Uniaxial (+), w=1.64, e=1.655, bire=0.0150.

Calculated Properties of Reidite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.84 gm/cc
note: Specific Gravity of Reidite =5.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEReidite = 68.77 barns/electron
U=PEReidite x rElectron Density= 332.98 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Reidite is Not Radioactive

Reidite Classification

Help on  Dana Class: Dana Class: (51)Nesosilicate Insular SiO4 Groups Only
  (51.05)with cations in >[6] coordination
  (51.05.06)Dana Group Reidite! ZrSiO4 I 41/a 4/m
Help on  Strunz Class: Strunz Class: 09.AD.45 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AD -Nesosilicates without additional anions;
09.AD.45 Reidite! ZrSiO4 I 41/a 4/m

Other Reidite Information

Help on References: References: NAME( AmMin, Vol 87, p 562) PHYS. PROP.(AmMin, Vol 87, p 562) OPTIC PROP.(AmMin, Vol 87, p 562)
Help on See Also: See Also: Links to other databases for Reidite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 09.AD.45





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