Jaffeite Mineral Data + 
|
[Express Minerals] [Minerals for Sale] [About Us] [En Espa�±ol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996
- 55.3.2.1 Jaffeite Ca4(Si3O7)(OH)6 P 3 3
- VIII/C.09-20 Tilleyite Ca5Si2O7(CO3)2 P 21/a 2/m
- VIII/C.09-30 Jaffeite Ca4(Si3O7)(OH)6 P 3 3
- VIII/C.09-40 Suolunite Ca2Si2O5(OH)2·(H2O) F dd2 mm2
- VIII/C.09-50 Killalaite 2Ca3Si2O7·(H2O) P 21/m 2/m
- VIII/C.09-60 Foshallasite Ca3Si2O7·3(H2O) Mono
General Jaffeite Information |
|||
 Chemical Formula: |
Ca4(Si3O7)(OH)6 | ||
| Composition: |
Molecular Weight = 458.61 gm | ||
| Calcium 34.96 % Ca 48.91 % CaO | |||
| Silicon 18.37 % Si 39.30 % SiO2 | |||
| Hydrogen 1.32 % H 11.78 % H2O | |||
| Oxygen 45.35 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca4(Si3O7)(OH)6 | ||
| Environment: |
Naturally occurring analog of "TSH" (Tricalcium Silicate Hydrate), a component of portland cement. | ||
| IMA Status: |
Approved IMA 1989 | ||
| Locality: |
Kombat mine, located 37 km east of Otavi and 49 km south of Tsumeb in the north-central part of Namibia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Howard Jaffe of the University of Massachusetts. | ||
| Synonym: |
ICSD 39725 | ||
| PDF 46-1285 | |||
Search for Jaffeite Images | |||
|
Images:
|
|
||
Jaffeite Crystallography |
|||
| Axial Ratios: |
a:c = 1:0.74625 | ||
| Cell Dimensions: |
a = 10.026, c = 7.482, Z = 2; V = 651.33 Den(Calc)= 2.34 | ||
| Crystal System: |
Trigonal - RhombohedralH-M Symbol ( 3) Space Group: P 3 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 8.66(1), 2.833(0.9), 2.996(0.9), | ||
Physical Properties of Jaffeite |
|||
| Cleavage: |
[???] Indistinct | ||
| Color: |
Colorless. | ||
| Density: |
2.65 | ||
| Diaphaniety: |
Transparent | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Jaffeite |
|||
| Gladstone-Dale: |
CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.142 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2564,KPDmeas= 0.2264,KC= 0.2245 |
||
| Optical Data: |
Uniaxial (+), w=1.596, e=1.604, bire=0.0080. | ||
Calculated Properties of Jaffeite |
|||
| Electron Density: |
relectron=2.68 gm/cc |
||
| Fermion Index |
Fermion Index = 0.00927 Boson Index = 0.99073 |
||
| Photoelectric: |
PEJaffeite = 4.97 barns/electron |
||
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Jaffeite is Not Radioactive |
||
Jaffeite Classification |
|||
| Dana Class: |
55.3.2.1 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions | ||
| (55.3)with cations in [7] coordination | |||
| (55.3.2)Dana Group | |||
| Strunz Class: |
VIII/C.09-30 VIII - Silicates | ||
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |||
| VIII/C.09 - Tilleyite - Foshallasite series | |||
Other Jaffeite Information |
|||
| References: |
NAME( MinRec, v 22, p 422) PHYS. PROP.(Am.Min.,Vol.74,p1203-1206,1989) OPTIC PROP.(Am.Min.,Vol.74,p1203-1206,1989) | ||
| See Also: |
Links to other databases for Jaffeite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Jaffeite using: Visit our Advertisers for Jaffeite : Translate Jaffeite Mineral Data : Ask about Jaffeite here : Print or Cut-and-Paste your Jaffeite Specimen Label here :
|
||
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |