 |
Mccrillisite Mineral Data |
|
|
Mccrillisite Mineral Data |
General Mccrillisite Information |
||
 Chemical Formula: |
NaCs(Be,Li)Zr2(PO4)4•1-2(H2O) | |
| Composition: |
Molecular Weight = 753.75 gm | |
| Cesium 17.63 % Cs 18.69 % Cs2O | ||
| Sodium 3.05 % Na 4.11 % Na2O | ||
| Lithium 0.23 % Li 0.50 % Li2O | ||
| Zirconium 24.21 % Zr 32.70 % ZrO2 | ||
| Beryllium 0.90 % Be 2.49 % BeO | ||
| Phosphorus 16.44 % P 37.66 % P2O5 | ||
| Hydrogen 0.40 % H 3.59 % H2O | ||
| Oxygen 37.15 % O | ||
| ______ ______ | ||
| 100.00 % 99.73 % = TOTAL OXIDE | ||
| Empirical Formula: |
NaCsBe0.75Li0.25Zr2(PO4)4•1.5(H2O) | |
| Environment: |
It occurs in open cavities up to several centimeters across and formed as a result of late-stage hydrothermal alteration of earlier formed Zr-bearing minerals. | |
| IMA Status: |
Approved IMA 1992 | |
| Locality: |
Mount Mica granite pegmatite, South Paris, Oxford County, Maine, USA. Link to MinDat.org Location Data. | |
| Name Origin: |
In honor of the late Dean McCrillis and his son, Philip. | |
| Name Pronunciation: |
Mccrillisite + Pronunciation  |
|
| Synonym: |
IMA1991-023 | |
Mccrillisite Crystallography |
||
| Axial Ratios: |
a:c = 1:2.62893 | |
| Cell Dimensions: |
a = 6.573, c = 17.28, Z = 2; V = 746.57 Den(Calc)= 3.35 | |
| Crystal System: |
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd | |
| X Ray Diffraction: |
By Intensity(I/Io): 3.06(1), 6.159(0.9), 4.326(0.8), | |
Physical Properties of Mccrillisite |
||
| Cleavage: |
None | |
| Color: |
Colorless, White. | |
| Density: |
3.12 | |
| Diaphaneity: |
Transparent to translucent | |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | |
| Habit: |
Crystalline - Fine - Occurs as well-formed fine sized crystals. | |
| Hardness: |
4.5 - Between Fluorite and Apatite | |
| Luminescence: |
Non-fluorescent. | |
| Luster: |
Vitreous (Glassy) | |
| Streak: |
white | |
Optical Properties of Mccrillisite |
||
| Gladstone-Dale: |
CI meas= -0.092 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1909,KPDmeas= 0.205,KC= 0.1877 Ncalc = 1.59 - 1.63 |
|
| Optical Data: |
Uniaxial (+), w=1.634, e=1.645, bire=0.0110. | |
Calculated Properties of Mccrillisite |
||
| Electron Density: |
Bulk Density (Electron Density)=3.14 gm/cc note: Specific Gravity of Mccrillisite =3.35 gm/cc. |
|
| Fermion Index: |
Fermion Index = 0.03 Boson Index = 0.97 |
|
| Photoelectric: |
PEMccrillisite = 105.94 barns/electron U=PEMccrillisite x rElectron Density= 332.18 barns/cc. |
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mccrillisite is Not Radioactive |
|
Mccrillisite Classification |
||
| Dana Class: |
40.05.04.02 (40)Hydrated Phosphates, etc | |
| (40.05)with miscellaneous formulae | ||
| (40.05.04)Gainesite Group | ||
| Strunz Class: |
08.CA.20 08 - PHOSPHATES, ARSENATES, VANADATES | |
| 08.C - Phosphates without Additional Anions, with H2O | ||
| 08.CA -With small and large/medium cations | ||
Other Mccrillisite Information |
||
| References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p1074,1995) OPTIC PROP.(MinRec) | |
| See Also: |
Links to other databases for Mccrillisite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - GeoScienceWorld 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - Mineralienatlas (Deutsch) 11 - Online Mineral Museum 12 - QUT Mineral Atlas 13 - Ruff.Info Search for Mccrillisite using: Visit our Advertisers for Mccrillisite : Ask about Mccrillisite here : Print or Cut-and-Paste your Mccrillisite Specimen Label here :
|
|
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.