| Reidite Mineral Data |
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- 51.5.6.1 Reidite ! ZrSiO4 I 41/a 4/m
- VIII/A.09-05 Reidite ZrSiO4 I 41/a 4/m
- VIII/A.09-10 Zircon ZrSiO4 I 41/amd 4/m 2/m 2/m
- VIII/A.09-20 Hafnon HfSiO4 I 41/amd 4/m 2/m 2/m
- VIII/A.09-30 Thorite ThSiO4 I 41/amd 4/m 2/m 2/m
- VIII/A.09-40 Coffinite U(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
- VIII/A.09-50 Thorogummite Th(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
General Reidite Information |
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 Chemical Formula: |
ZrSiO4 | ||
| 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 | |||
| Empirical Formula: |
Zr(SiO4) | ||
| Environment: |
Inclusions in shocked zircon grains with a scheelite-type structure. Pressures of 30 GPa to 53 GPa are required for this transition. | ||
| IMA Status: |
Approved IMA 2001 (Dana # Added) | ||
| 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. | ||
| Name Origin: |
Named for Alan F. Reid who first produced this high pressure phase in the laboratory. | ||
| Synonym: |
IMA2001-013 | ||
Reidite Image | |||
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Images:
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Reidite Crystallography |
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| Axial Ratios: |
a:c = 1:2.21739 | ||
| Cell Dimensions: |
a = 4.738, c = 10.506, Z = 4; V = 235.85 Den(Calc)= 5.16 | ||
| Crystal System: |
Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 41/a | ||
| 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 |
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| Cleavage: |
None | ||
| Color: |
White. | ||
| Diaphaniety: |
Translucent | ||
| Fracture: |
Brittle - Irregular - Very brittle fracture producing irregular fragments | ||
| Habit: |
Epitaxial - Crystallographic alignment with a precursor mineral | ||
| Habit: |
Inclusions - Generally found as inclusions in other minerals. | ||
| Hardness: |
7.5 - Garnet | ||
| Luster: |
Adamantine | ||
| Streak: |
white | ||
Optical Properties of Reidite |
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| Gladstone-Dale: |
CI calc= 0.403 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1255,KC= 0.21 |
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| Optical Data: |
Uniaxial (+), w=1.64, e=1.655, bire=0.0150. | ||
Calculated Properties of Reidite |
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| Electron Density: |
relectron=4.84 gm/cc |
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| Fermion Index |
Fermion Index = 0.06315 Boson Index = 0.93685 |
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| Photoelectric: |
PEReidite = 68.77 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Reidite is Not Radioactive |
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Reidite Classification |
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| Dana Class: |
51.5.6.1 (51)Nesosilicate Insular SiO4 Groups Only | ||
| (51.5)with cations in >[6] coordination | |||
| (51.5.6)Dana Group | |||
| Strunz Class: |
VIII/A.09-05 VIII - Silicates | ||
| VIII/A - Nesosilicates with [SiO4]4-groups, cations of octahedral and cubic orientation [8+6] | |||
| VIII/A.09 - Zircon - Thorogummite series | |||
Other Reidite Information |
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| References: |
NAME( AmMin, Vol 87, p 562) PHYS. PROP.(AmMin, Vol 87, p 562) OPTIC PROP.(AmMin, Vol 87, p 562) | ||
| See Also: |
Links to other databases for Reidite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Reidite using: Visit our Advertisers for Reidite : Translate Reidite Mineral Data : Ask about Reidite here : Print or Cut-and-Paste your Reidite Specimen Label here :
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