Erythrosiderite Mineral Data

(Translated by https://www.hiragana.jp/)
Erythrosiderite Mineral Data

General Erythrosiderite Information

Chemical Formula:

K2Fe+++Cl5•(H2O)

Composition:

Molecular Weight = 329.32 gm

Potassium 23.74 % K 28.60 % K₂O

Iron 16.96 % Fe 24.25 % Fe₂O₃

Hydrogen 0.61 % H 5.47 % H₂O

Chlorine 53.83 % Cl 53.83 % Cl

- % Cl -12.15 % -O=Cl₂

Oxygen 4.86 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂Fe³⁺Cl₅•(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1872

Locality:

Vesuvius and Etna. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek, erythros = "red" and sideros = "iron."

Name Pronunciation:

Erythrosiderite + Pronunciation

Synonym:

ICSD 79782

PDF 29-1004

Erythrosiderite Image

Images:

Click Here for Larger Erythrosiderite Image

Erythrosiderite Salammoniac

Comments: Orange-brown aggregates of erythrosiderite with sal ammoniac. Material from the 1926 eruption of the Erythrosiderite is hygroscopic and must be stored in a closed vial. The photo was made through the vial.
Location: Vesuvius, Naples Province, Campania, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Erythrosiderite Crystallography

Axial Ratios:

a:b:c =1.3855:1:0.6983

Cell Dimensions:

a = 13.75, b = 9.924, c = 6.93, Z = 4; V = 945.63 Den(Calc)= 2.31

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

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 0) ( 2 0 1) ( 1 0 1) ( 1 0 0)

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

Schultz A J , Carlin R L , Acta Crystallographica, Section B , 51 (1995) p.43-47, Single-crystal pulsed neutron diffraction structure of the antiferromagnet, K2[FeCl5(H2O)] with and without applied pressure, Locality: synthetic, Sample: P = .14 GPa, Sample: T = 15 K

Physical Properties of Erythrosiderite

Cleavage:

{210} Perfect, {011} Perfect

Color:

Brown red, Red.

Density:

2.372

Diaphaneity:

Transparent to Translucent

Habit:

Pseudo Octohedral - Crystals show an octohedral outline.

Habit:

Tabular - Form dimensions are thin in one direction.

Luster:

Vitreous (Glassy)

Optical Properties of Erythrosiderite

Optical Data:

Biaxial (+), a=1.715, b=1.75, g=1.8, bire=0.0850, 2V(Calc)=82, 2V(Meas)=62. Dispersion strong, r > v.

Calculated Properties of Erythrosiderite

Electron Density:

Bulk Density (Electron Density)=2.23 gm/cc
note: Specific Gravity of Erythrosiderite =2.31 gm/cc.

Fermion Index:

Fermion Index = 0.0036478605
Boson Index = 0.9963521395

Photoelectric:

PE_{Erythrosiderite}= 11.09 barns/electron
U=PE_{Erythrosiderite} x r_electron= 24.74 barns/cc.

Radioactivity:

GRapi = 330.84 (Gamma Ray American Petroleum Institute Units)
Concentration of Erythrosiderite per GRapi unit = 0.30 (%)

Estimated Radioactivity from Erythrosiderite - barely detectable

Erythrosiderite Classification

Dana Class:

11.04.01.01 (11)Halide Complexes; Alumino-fluorides

(11.04)where (A)m B (X)5 · x(H2O)

(11.04.01)Dana Group

11.04.01.01 Erythrosiderite K2FeCl5•(H2O) P nma 2/m 2/m 2/m

11.04.01.02 Kremersite (NH4,K)2FeCl5•(H2O) Pmnb 2/m 2/m 2/m

Strunz Class:

03.CJ.10 03 - HALIDES

03.C - Complex Halides

03.CJ -With MX6 complexes; M = Fe, Mn, Cu

03.CJ.10 Erythrosiderite K2FeCl5•(H2O) P nma 2/m 2/m 2/m

03.CJ.10 Kremersite (NH4,K)2FeCl5•(H2O) Pmnb 2/m 2/m 2/m

Other Erythrosiderite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Erythrosiderite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

Search for Erythrosiderite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Erythrosiderite :

A Bijoux Google Search for Erythrosiderite
Adam's Minerals Google Search for Erythrosiderite
Cape Minerals Google Search for Erythrosiderite
Dakota Matrix Minerals Google Search for Erythrosiderite
Excalibur Mineral Corp. Google Search for Erythrosiderite
Exceptional Minerals Google Search for Erythrosiderite
John Betts Fine Minerals Search for Erythrosiderite
McDougall Minerals Google Search for Erythrosiderite
Mineral News Website Link
Rock and Mineral Shows Google Search for Erythrosiderite
Weinrich Minerals, Inc. Google Search for Erythrosiderite

Ask about Erythrosiderite 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 Erythrosiderite Specimen Label here :

Erythrosiderite

K2Fe+++Cl5•(H2O)
Dana No: 11.04.01.01 Strunz No: 03.CJ.10
Locality:

Notes: