Chondrodite Mineral Data + 
|
[Register] [Auction Rules] [Current Listing] [About Us] [Site Map]
e-Rocks.com, auction and sales venue for all rock and mineral enthusiasts
Our mission is to provide an online centre for Buyers and Sellers with reliable service and support
Brought to you by Thames Valley Minerals
- 52.3.2b.1 Alleghanyite Mn5(SiO4)2(OH)2 P 21/a 2/m
- 52.3.2b.2 Chondrodite (Mg,Fe)5(SiO4)2(F,OH)2 P 21/c 2/m
- 52.3.2b.3 Reinhardbraunsite Ca5(SiO4)2(OH,F)2 P 21/a 2/m
- 52.3.2b.4 Ribbeite (Mn,Mg)5(SiO4)2(OH)2 P nma 2/m 2/m 2/m
- VIII/B.04-10 Norbergite Mg3(SiO4)(F,OH)2 P nma 2/m 2/m 2/m
- VIII/B.04-20 Chondrodite (Mg,Fe)5(SiO4)2(F,OH)2 P 21/c 2/m
- VIII/B.04-30 Humite (Mg,Fe)7(SiO4)3(F,OH)2 P nma 2/m 2/m 2/m
- VIII/B.04-40 Clinohumite (Mg,Fe)9(SiO4)4(F,OH)2 P 21/c 2/m
- VIII/B.04-42 Hydroxylclinohumite! Mg9(SiO4)4(OH,F)2 P 21/c 2/m
- VIII/B.04-50 Ribbeite (Mn,Mg)5(SiO4)2(OH)2 P nma 2/m 2/m 2/m
- VIII/B.04-60 Alleghanyite Mn5(SiO4)2(OH)2 P 21/a 2/m
- VIII/B.04-70 Reinhardbraunsite Ca5(SiO4)2(OH,F)2 P 21/a 2/m
- VIII/B.04-80 Manganhumite (Mn,Mg)7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m
- VIII/B.04-90 Leucophoenicite Mn7(SiO4)3(OH)2 P 21/a 2/m
- VIII/B.04-100 Jerrygibbsite (Mn,Zn)9(SiO4)4(OH)2 Pbn21 mm2
- VIII/B.04-110 Sonolite Mn9(SiO4)4(OH,F)2 P 21/a 2/m
General Chondrodite Information |
|||
 Chemical Formula: |
(Mg,Fe++)5(SiO4)2(F,OH)2 | ||
| Composition: |
Molecular Weight = 382.12 gm | ||
| Magnesium 23.85 % Mg 39.55 % MgO | |||
| Iron 18.27 % Fe 23.50 % FeO | |||
| Silicon 14.70 % Si 31.45 % SiO2 | |||
| Hydrogen 0.13 % H 1.18 % H2O | |||
| Oxygen 35.59 % O | |||
| Fluorine 7.46 % F 7.46 % F | |||
| - % F -3.14 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mg3.75Fe2+1.25(SiO4)2F1.5(OH)0.5 | ||
| Environment: |
Contact metamorphic rocks. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1817 | ||
| Locality: |
Wunsiedel and Passau, Germany. Link to MinDat.org Location Data. | ||
| Name Origin: |
From the Greek chondros - "grain." | ||
| Synonym: |
ICSD 15180 | ||
| PDF 12-527 | |||
Chondrodite Image | |||
|
Images:
|
|
||
|
Images:
|
|
||
Chondrodite Crystallography |
|||
| Axial Ratios: |
a:b:c =1.6638:1:2.1712 | ||
| Cell Dimensions: |
a = 7.87, b = 4.73, c = 10.27, Z = 2; beta = 109.033° V = 361.40 Den(Calc)= 3.51 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.252(1), 2.272(1), 1.737(0.95), | ||
|
Crystal Structure:
Mouse |
| ||
Physical Properties of Chondrodite |
|||
| Cleavage: |
[100] Good | ||
| Color: |
Yellow, Orange, Brownish white, Reddish white, Greenish white. | ||
| Density: |
3.1 - 3.2, Average = 3.15 | ||
| Diaphaniety: |
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. | ||
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. | ||
| Hardness: |
6-6.5 - Orthoclase-Pyrite | ||
| Luminescence: |
Non-fluorescent. | ||
| Luster: |
Vitreous - Greasy | ||
| Streak: |
gray | ||
Optical Properties of Chondrodite |
|||
| Gladstone-Dale: |
CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.084 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1798,KPDmeas= 0.2003,KC= 0.1962 |
||
| Optical Data: |
Biaxial (+), a=1.592-1.643, b=1.602-1.655, g=1.619-1.675, bire=0.0270-0.0320, 2V(Calc)=76-78, 2V(Meas)=64-90. Dispersion weak to moderate, r > v. | ||
| Pleochroism (x): |
yellowish brown, deep chrome yellow, reddish brown, or brownish yellow. | ||
| Pleochroism (y): |
pale yellowish brown, yellow, pale reddish brown, or yellowish green. | ||
| Pleochroism (z): |
colorless, light yellow, pale brown, or pale green. | ||
Calculated Properties of Chondrodite |
|||
| Electron Density: |
relectron=3.09 gm/cc |
||
| Fermion Index |
Fermion Index = 0.03476 Boson Index = 0.96524 |
||
| Photoelectric: |
PEChondrodite = 6.55 barns/electron |
||
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chondrodite is Not Radioactive |
||
Chondrodite Classification |
|||
| Dana Class: |
52.3.2b.2 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O | ||
| (52.3)with cations in [6] coordination only | |||
| (52.3.2b)Humite group (Chondrodite series) | |||
| Strunz Class: |
VIII/B.04-20 VIII - Silicates | ||
| VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6] | |||
| VIII/B.04 - Humite group | |||
Other Chondrodite Information |
|||
| References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | ||
| See Also: |
Links to other databases for Chondrodite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 - Franklin Minerals(Dunn) 8 - Franklin Minerals(Palache) 9 -Google Images 10 -Google Scholar 11 -Handbook of Mineralogy (MinSocAm) 12 -Handbook of Mineralogy (UofA) 13 - HyperPhysics 14 -MinDAT 15 -MinMax(Deutsch) 16 -MinMax(English) 17 -Mineralienatlas (Deutsch) 18 -QUT Mineral Atlas 19 - Scandinavian mineral gallery 20 -University of Colorado - Mineral Structure Data 21 - WWW-MINCRYST 22 -École des Mines de Paris Search for Chondrodite using: Visit our Advertisers for Chondrodite : Translate Chondrodite Mineral Data : Ask about Chondrodite here : Print or Cut-and-Paste your Chondrodite Specimen Label here :
|
||
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |