General Paracoquimbite Information
|
Chemical Formula: |
Fe+++2(SO4)3·9(H2O) |
Composition: |
Molecular Weight = 562.02 gm |
| |
Iron 19.87 % Fe 28.41 % Fe2O3 |
| |
Hydrogen 3.23 % H 28.85 % H2O |
| |
Sulfur 17.12 % S 42.74 % SO3 |
| |
Oxygen 59.78 % O |
| |
______ ______ |
| |
100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Fe3+2(SO4)3·9(H2O) |
IMA Status: |
Valid Species (Pre-IMA) 1935 |
Locality: |
Link to MinDat.org Location Data. |
Synonym: |
ICSD 15211 |
| |
PDF 27-254 |
| |
Search for Paracoquimbite Images |
Images:
|
|
| | |
Paracoquimbite Crystallography
|
Axial Ratios: |
a:c = 1:4.6935 |
Cell Dimensions: |
a = 10.93, c = 51.3, Z = 12; V = 5,307.48 Den(Calc)= 2.11 |
Crystal System: |
Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3 |
X Ray Diffraction: |
By Intensity(I/Io): 8.26(1), 2.76(0.75), 5.45(0.65), |
Forms:
Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above
|
|
|
Forms:
[ 1 1 2]
[ 1 1 4]
[ 1 1 1]
[ 1 1 7]
[ 1 0 0]
[ 1 1 5]
[ 1 1 10]
[ 0 0 1]
Warning: this large pop-up is very compute intensive and
may not work well with some computers.
|
|
Crystal Structure:
Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above
|
|
|
Robinson P D , Fang J H , American Mineralogist , 56 (1971) p.1567-1572, Crystal structures and mineral chemistry of hydrated ferric sulphates: II. The, crystal structure of paracoquimbite
|
|
| |
Physical Properties of Paracoquimbite
|
Cleavage: |
[0112] Indistinct, [1014] Indistinct |
Color: |
Light violet. |
Density: |
2.11 |
Diaphaniety: |
Transparent |
Hardness: |
2.5 - Finger Nail |
Luster: |
Vitreous (Glassy) |
| |
Optical Properties of Paracoquimbite
|
Gladstone-Dale: |
CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2618,KPDmeas= 0.2618,KC= 0.2632 |
Optical Data: |
Uniaxial (+), w=1.55, e=1.555, bire=0.0050. |
| |
Calculated Properties of Paracoquimbite
|
Electron Density: |
relectron=2.15 gm/cc note: rParacoquimbite =2.11 gm/cc. |
Fermion Index |
Fermion Index = 0.00578 Boson Index = 0.99422 |
Photoelectric: |
PEParacoquimbite = 6.81 barns/electron U=PEParacoquimbite x relectron= 14.63 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Paracoquimbite is Not Radioactive |
| |
Paracoquimbite Classification
|
Dana Class: |
29.8.4.1 (29)Hydrated Acid and Sulfates |
| |
(29.8)where (A)2 (XO4)3 · x(H2O) |
| |
(29.8.4)Dana Group |
| |
29.8.4.1 Paracoquimbite Fe2(SO4)3·9(H2O) R 3 3 |
Strunz Class: |
VI/C.08-50 VI - Sulfates,Chromates,Molybdates and Tungstates |
| |
VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium size |
| |
VI/C.08 - Rhomboclase - Meta-alunogen series |
| |
VI/C.08-10 Rhomboclase (H5O2)Fe(SO4)2·2(H2O) P nma 2/m 2/m 2/m |
| |
VI/C.08-20 Lausenite Fe2(SO4)3·6(H2O) Unk. Mono |
| |
VI/C.08-30 Kornelite Fe2(SO4)3·7(H2O) P 21/c 2/m |
| |
VI/C.08-40 Coquimbite Fe2(SO4)3·9(H2O) P 3c 3 2/m |
| |
VI/C.08-50 Paracoquimbite Fe2(SO4)3·9(H2O) R 3 3 |
| |
VI/C.08-60 Quenstedtite Fe2(SO4)3·10(H2O) P1 1 |
| |
VI/C.08-70 Alunogen Al2(SO4)3·17(H2O) P1 1 |
| |
VI/C.08-80 Meta-alunogen Al4(SO4)6·27(H2O) Mono |
| |
Other Paracoquimbite Information
|
References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Paracoquimbite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -Handbook of Mineralogy (UofA)
7 -MinDAT
8 -MinMax(Deutsch)
9 -MinMax(English)
10 -Mineralienatlas (Deutsch)
11 -QUT Mineral Atlas
12 - WWW-MINCRYST
13 -École des Mines de Paris
Search for Paracoquimbite using:
[ALTAVISTA]
[AOL]
[About.com]
[All-The-Web]
[HotBot]
[Ixquick]
[LookSmart]
[MAMMA]
[MSN.COM]
[Netscape]
[Teoma]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Paracoquimbite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop
Translate Paracoquimbite Mineral Data :
Ask about Paracoquimbite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Español
Print or Cut-and-Paste your Paracoquimbite Specimen Label here :
|
Paracoquimbite
Fe+++2(SO4)3·9(H2O)
Dana No: 29.8.4.1 Strunz No: VI/C.08-50
Locality:
Notes:
|
|
| |
| |
|
| |