Kalifersite Mineral Data

General Kalifersite Information

Chemical Formula:

(K,Na)5Fe+++7Si20O50(OH)6•12(H2O)

Composition:

Molecular Weight = 2,242.17 gm

Potassium 6.10 % K 7.35 % K₂O

Sodium 1.54 % Na 2.07 % Na₂O

Iron 17.44 % Fe 24.93 % Fe₂O₃

Silicon 25.05 % Si 53.59 % SiO₂

Hydrogen 1.35 % H 12.05 % H₂O

Oxygen 48.52 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_3.5Na_1.5Fe³⁺₇Si₂₀O₅₀(OH)₆•12(H₂O)

Environment:

In a hydrothermally altered pegmatite. Polysomatic series with palygorskite and sepiolite.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Mt. Kukisvumchorr, Khibina massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

For the chemical composition: KALIum (Potassium), FERrum (Iron), and SIlicium (Silicon).

Name Pronunciation:

Kalifersite + Pronunciation

Synonym:

ICSD 85700

IMA1996-007

Kalifersite Image

Images:

Kalifersite

Comments: Brownish-red crystalline granular aggregates of kalifersite in rock matrix composed of fibers to 5mm.
Location: Mt. Rasvumchorr, Khibiny massif, Kola Peninsula, Russia. Scale: Specimen size 3.5 x 2 x 1.5cm.
© Tom Loomis / Dakota Matrix

Kalifersite Crystallography

Axial Ratios:

a:b:c =0.7234:1:0.2575

Cell Dimensions:

a = 14.86, b = 20.54, c = 5.29, Z = 1; alpha = 95.6°, beta = 92.3°, gamma = 94.4° V = 1,600.90 Den(Calc)= 2.33

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 12.36(1), 11.6(0.4), 3.411(0.37),

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

Ferraris G , Khomyakov A P , Belluso E , Soboleva S V , European Journal of Mineralogy , 10 (1998) p.865-874, Kalifersite, a new alkaline silicate from Kola Peninsula (Russia), based on a palygorskite-sepiolite polysomatic series, Locality: Kola Peninsula, Russia

Physical Properties of Kalifersite

Cleavage:

{100} Good, {010} Good

Color:

Brownish pink.

Density:

2.28 - 2.37, Average = 2.32

Diaphaneity:

Translucent

Fracture:

Fibrous - Thin, elongated fractures produced by crystal forms or intersecting cleavages (e.g. asbestos).

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

2 - Gypsum

Luster:

Silky

Streak:

white

Optical Properties of Kalifersite

Gladstone-Dale:

CI meas= 0.081 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.083 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2286,KPDmeas= 0.2291,KC= 0.2493
Ncalc = 1.57 - 1.59

Optical Data:

Biaxial (+), a=1.523, b=1.525, g=1.55, bire=0.0270, 2V(Calc)=32, 2V(Meas)=30. Dispersion not discernible.

Calculated Properties of Kalifersite

Electron Density:

Bulk Density (Electron Density)=2.32 gm/cc
note: Specific Gravity of Kalifersite =2.33 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Kalifersite= 6.72 barns/electron
U=PE_Kalifersite x r_electron= 15.59 barns/cc.

Radioactivity:

GRapi = 87.88 (Gamma Ray American Petroleum Institute Units)
Concentration of Kalifersite per GRapi unit = 1.14 (%)

Estimated Radioactivity from Kalifersite - barely detectable

Kalifersite Classification

Dana Class:

74.03.01a.04 (74)Phyllosilicate Modulated Layers

(74.03)with joined strips

(74.03.01a)Palygorskite-sepiolite group (Palygorskite subgroup)

74.03.01a.01 Palygorskite (Mg,Al)2Si4O10(OH)•4(H2O) C 2/m 2/m

74.03.01a.02 Tuperssuatsiaite Na(Fe,Mn)3[Si8O20](OH)2•n(H2O) C 2/m Mono

74.03.01a.03 Yofortierite (Mn,Mg)5Si8O20(OH)2•8-9(H2O) Pn(?) m

74.03.01a.04 Kalifersite! (K,Na)5Fe7Si20O50(OH)6•12(H2O) P1 1

Strunz Class:

09.EE.25 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EE -Single tetrahedral nets of 6-membered rings

09.EE.25 Falcondoite (Ni,Mg)4Si6O15(OH)2•6(H2O) Pncn 2/m 2/m 2/m

09.EE.25 Loughlinite Na2Mg3Si6O16•8(H2O) Unk Ortho

09.EE.25 Kalifersite! (K,Na)5Fe7Si20O50(OH)6•12(H2O) P1 1

09.EE.25 Sepiolite Mg4Si6O15(OH)2•6(H2O) Pnan 2/m 2/m 2/m

Other Kalifersite Information

References:

NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.10,p865,1998) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Kalifersite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - WWW-MINCRYST

Search for Kalifersite using:

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

Visit our Advertisers for Kalifersite :

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

Ask about Kalifersite 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 Kalifersite Specimen Label here :

Kalifersite

(K,Na)5Fe+++7Si20O50(OH)6•12(H2O)
Dana No: 74.03.01a.04 Strunz No: 09.EE.25
Locality:

Notes: