Mereiterite Mineral Data

Mereiterite Mineral Data +

General Mereiterite Information

Chemical Formula:

K2Fe++(SO4)2·4(H2O)

Composition:

Molecular Weight = 398.23 gm

Potassium 19.64 % K 23.65 % K₂O

Iron 14.02 % Fe 18.04 % FeO

Hydrogen 2.02 % H 18.10 % H₂O

Sulfur 16.10 % S 40.21 % SO₃

Oxygen 48.21 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂Fe²⁺(SO₄)₂·4(H₂O)

Environment:

In a pocket in marble.

IMA Status:

Approved IMA 1995, Dana # Changed (28.4.3.3)

Locality:

The D-level of the Hilarion adit, Agios Konstadinos, Lavrion Mining District, Greece. Link to MinDat.org Location Data.

Name Origin:

For Dr. Kurt Mereiter (1945- ), Technical University of Vienna, Austria.

Synonym:

Dana 28.4.3.3

ICSD 79854

IMA1993-045

PDF 46-1437

Search for Mereiterite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Mereiterite Crystallography

Axial Ratios:

a:b:c =1.2395:1:1.0407

Cell Dimensions:

a = 11.841, b = 9.553, c = 9.942, Z = 4; beta = 94.9° V = 1,120.50 Den(Calc)= 2.36

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.444(1), 3.505(0.52), 2.39(0.49),

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

Hertweck B , Giester G , Libowitzky E , American Mineralogist , 86 (2001) p.1282-1292, The crystal structures of the low-temperature phases of leonite-type compounds,, K2Me(SO4)2.4H2O (Me=Mg,Mn,Fe), Sample: K2Fe(SO4)2.4H2O, T = 185 K

View Additional jPOWD Structure files for Mereiterite
[1] [2]

Physical Properties of Mereiterite

Cleavage:

None

Color:

Pale yellow.

Density:

2.36

Diaphaniety:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Hardness:

2.5-3 - Finger Nail-Calcite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Mereiterite

Gladstone-Dale:

CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2129,KPDmeas= 0.2129,KC= 0.213

Optical Data:

Biaxial (+), a=1.497, b=1.501, g=1.509, bire=0.0120, 2V(Calc)=72, 2V(Meas)=73. Dispersion very weak, r > v.

Calculated Properties of Mereiterite

Electron Density:

r_electron=2.37 gm/cc
note: r_Mereiterite=2.36 gm/cc.

Fermion Index

Fermion Index = 0.00443
Boson Index = 0.99557

Photoelectric:

PE_Mereiterite= 7.02 barns/electron
U=PE_Mereiterite x r_electron= 16.64 barns/cc.

Radioactivity:

GRapi = 284.59 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Mereiterite - barely detectable

Mereiterite Classification

Dana Class:

29.3.3.4 (29)Hydrated Acid and Sulfates

(29.3)where (A+)2 B (XO4)2 · x(H2O)

(29.3.3)Dana Group

29.3.3.1 Blodite Na2Mg(SO4)2·4(H2O) P 2₁/a 2/m

29.3.3.2 Nickelblodite Na2(Ni,Mg)(SO4)2·4(H2O) P 2₁/a 2/m

29.3.3.3 Leonite K2Mg(SO4)2·4(H2O) C 2/m 2/m

29.3.3.4 Mereiterite ! K2Fe(SO4)2·4(H2O) C 2/m 2/m

29.3.3.5 Changoite! Na2Zn(SO4)2·4(H2O) P 2₁/a 2/m

Strunz Class:

VII/C.18-35 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.18 - Wicksite - Alentaite series

VII/C.18-10 Wicksite NaCa2(Fe,Mn)4MgFe(PO4)6·2(H2O) P bca 2/m 2/m 2/m

VII/C.18-15 Bederite! ([],Na)Ca2(Mn,Mg,Fe)2(Fe,Mg,Al)2Mn2(PO4)6·2(H2O) Pcab 2/m 2/m 2/m

VII/C.18-20 Grischunite NaCa2Mn5Fe(AsO4)6·2(H2O) Pcab 2/m 2/m 2/m

VII/C.18-30 Walentaite (Ca,Mn,Fe)Fe3(AsO4)(PO4)3(PO3OH) I mmm, I bam, I bca, I mma Ortho

VII/C.18-35 Mereiterite K2Fe(SO4)2·4(H2O) C 2/m 2/m

Other Mereiterite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Mereiterite :
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

Search for Mereiterite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Mereiterite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Mereiterite Mineral Data :

Ask about Mereiterite 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 Mereiterite Specimen Label here :

Mereiterite

K2Fe++(SO4)2·4(H2O)
Dana No: 29.3.3.4 Strunz No: VII/C.18-35
Locality:

Notes: