Suhailite Mineral Data

General Suhailite Information

Chemical Formula:

(NH4)Fe3(Si3Al)O10(OH)2

Composition:

Molecular Weight = 445.65 gm

Potassium 3.07 % K 3.70 % K₂O

Sodium 0.36 % Na 0.49 % Na₂O

Calcium 0.36 % Ca 0.50 % CaO

Magnesium 3.87 % Mg 6.42 % MgO

Titanium 2.36 % Ti 3.94 % TiO₂

Manganese 0.12 % Mn 0.16 % MnO

Aluminum 10.60 % Al 20.02 % Al₂O₃

Iron 16.67 % Fe 21.44 % FeO

Silicon 16.83 % Si 36.00 % SiO₂

Hydrogen 0.50 % H - % Calc as (NH₄)₂O

Hydrogen 0.45 % H 4.04 % H₂O

Nitrogen 1.73 % N 3.21 % (NH₄)₂O

Oxygen 43.08 % O

______ ______

100.00 % 99.93 % = TOTAL OXIDE

Empirical Formula:

Ca_0.04Na_0.07K_0.35(NH₄)_0.55Al_0.42Ti_0.22Fe²⁺_1.33Mn²⁺_0.01Mg_0.71Si_2.67Al_1.33O₁₀OH₂

Environment:

Found in polymetamorphic pelitic gneisses and transitional schists-gneisses from the uppermost tectonic unit of the Alpujárride Complex. Ammonium-bearing trioctahedral mica, Mica gr oup.

IMA Status:

Approved IMA 2007 (Dana # Added)

Locality:

Fuengirola, Málaga Province (Betic Cordillera), Spain. Link to MinDat.org Location Data.

Name Origin:

Not stated in paper.

Synonym:

IMA2007-040

Suhailite Image

Images:

Suhailite

Comments: PPL thin-section showing unoriented grains of graphite-rich golden suhailite. Suh - suhalite, Ann - annite, Sil - sillimanite. (AmMin v94:211).
Location: Betic Cordillera gneisses (Spain). Scale: See Image.
© American Mineralogist

Suhailite Crystallography

Axial Ratios:

a:b:c =0.5757:1:1.1318

Cell Dimensions:

a = 5.296, b = 9.199, c = 10.412, Z = 2; beta = 99.991° V = 499.56 Den(Calc)= 2.96

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): 10.44(1)(001 ), 3.485(0.3)(003 ), 2.644(0.11)(130 ),2.088(0.08)(005 ), 2.613(0.08)(004 ), 1.533(0.06)(060 ), 5.22(0.05)(002 ), 4.54(0.04)(110 ), 4.6(0.04)(020 ),

Physical Properties of Suhailite

Cleavage:

{001} Perfect

Color:

Golden yellow.

Diaphaneity:

Transparent

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Optical Properties of Suhailite

Gladstone-Dale:

CI calc= -0.043 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2171,KC= 0.2083
Ncalc = 1.62

Optical Data:

Biaxial (-), a=1.624, b=1.652, g=1.652, bire=0.0280, 2V(Calc)=0, 2V(Meas)=0-4. Dispersion dispersion not observed.

Calculated Properties of Suhailite

Electron Density:

Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Suhailite =2.96 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Suhailite= 6.72 barns/electron
U=PE_Suhailite x r_electron= 19.70 barns/cc.

Radioactivity:

GRapi = 43.84 (Gamma Ray American Petroleum Institute Units)
Concentration of Suhailite per GRapi unit = 2.28 (%)

Estimated Radioactivity from Suhailite - barely detectable

Suhailite Classification

Dana Class:

71.02.02b.18 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.02)with 2:1 Layers

(71.02.02b)Mica Group (Biotite subgroup)

71.02.02b.01 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m

71.02.02b.01a Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m

71.02.02b.01b Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m

71.02.02b.01c Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m

71.02.02b.02 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m

71.02.02b.03 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m

71.02.02b.03a Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m

71.02.02b.04 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m

71.02.02b.05 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m

71.02.02b.05a Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m

71.02.02b.06 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m

71.02.02b.07 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono

71.02.02b.08 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m

71.02.02b.08a Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m

71.02.02b.08b Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono

71.02.02b.09 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m

71.02.02b.10 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m

71.02.02b.11 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m

71.02.02b.12 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m

71.02.02b.13 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m

71.02.02b.14 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m

71.02.02b.15 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m

71.02.02b.16 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m

71.02.02b.18 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m

Strunz Class:

09.EC.20 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.20 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m

09.EC.20 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m

09.EC.20 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m

09.EC.20 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m

09.EC.20 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m

09.EC.20 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono

09.EC.20 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m

09.EC.20 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m

09.EC.20 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m

09.EC.20 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m

09.EC.20 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m

09.EC.20 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m

09.EC.20 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m

09.EC.20 Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m

09.EC.20 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m

09.EC.20 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m

09.EC.20 Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m

09.EC.20 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m

09.EC.20 Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m

09.EC.20 Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m

09.EC.20 Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono

09.EC.20 Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m

09.EC.20 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m

09.EC.20 Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m

Other Suhailite Information

References:

NAME( AmMin, v94:210) PHYS. PROP.(AmMin, v94:210) OPTIC PROP.(AmMin, v94:210)

See Also:

Links to other databases for Suhailite :
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

Search for Suhailite using:

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

Visit our Advertisers for Suhailite :

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

Ask about Suhailite 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 Suhailite Specimen Label here :

Suhailite

(NH4)Fe3(Si3Al)O10(OH)2
Dana No: 71.02.02b.18 Strunz No: 09.EC.20
Locality:

Notes: