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 Alpujï¿½rride Complex. Ammonium-bearing trioctahedral mica, Mica gr oup.

IMA Status:

Approved IMA 2007 (Dana # Added)

Locality:

Fuengirola, Mï¿½laga 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 - Prismatic H-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

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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:

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