Fluorophlogopite Mineral Data

General Fluorophlogopite Information

Chemical Formula:

KMg3(AlSi3)O10F2

Composition:

Molecular Weight = 415.82 gm

Potassium 6.86 % K 8.27 % K₂O

Sodium 0.44 % Na 0.60 % Na₂O

Lithium 0.13 % Li 0.29 % Li₂O

Magnesium 16.83 % Mg 27.91 % MgO

Titanium 0.69 % Ti 1.15 % TiO₂

Manganese 0.13 % Mn 0.17 % MnO

Aluminum 5.06 % Al 9.56 % Al₂O₃

Iron 0.94 % Fe 1.21 % FeO

Silicon 21.34 % Si 45.66 % SiO₂

Hydrogen 0.02 % H 0.15 % H₂O

Oxygen 38.86 % O

Fluorine 8.68 % F 8.68 % F

- % F -3.66 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_0.73Na_0.08Li_0.04Mg_2.88Fe²⁺_0.07Li_0.04Mn²⁺_0.01Si_3.16Al_0.78Ti_0.06O_10.03F_1.9(OH)_0.07

Environment:

Occurs within interstitial, friable altered material in lava fissures and breccias. Mica group (1M polytype): C2/m; structure determined.

IMA Status:

Approved IMA 2006 (Dana # Added)

Locality:

Southwest flank of the Etnean Volcanic Complex, Biancavilla, Catania, Mt. Etna, Sicily, Italy. Link to MinDat.org Location Data.

Name Origin:

Named as the fluorine analog of phlogopite.

Synonym:

IMA2006-011

Fluorophlogopite Image

Images:

Fluorophlogopite

Comments: Books of fluorphlogopite from a magnesian skarn showing the basal cleaveage of the micas..
Location: Arebilovskoe phlogopite deposit, Aldan, Aldan Shield, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia. Scale: Specimen size is 3.5x2.5x0.8 cm.
© Pavel M. Kartashov

Fluorophlogopite Crystallography

Axial Ratios:

a:b:c =0.5773:1:1.1038

Cell Dimensions:

a = 5.305, b = 9.189, c = 10.1437, Z = 2; beta = 100.062° V = 486.88 Den(Calc)= 2.84

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): 9.99(1), 3.37(0.8), 3.12(0.8),1.32(0.8), 2.61(0.73), 1.607(0.7), 1.574(0.6), 1.304(0.6), 4.41(0.6),

Crystal Structure:

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Hazen R M , Finger L W , American Mineralogist , 63 (1978) p.293-296, The crystal structures and compressibilities of layer minerals at high, pressure. II. Phlogopite and chlorite, P = 35 kbar, sample is from Franklin, New Jersey, USA

Physical Properties of Fluorophlogopite

Cleavage:

{001} Perfect

Color:

Pale yellow.

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

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

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Fluorophlogopite

Gladstone-Dale:

CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1972,KC= 0.2006
Ncalc = 1.57

Optical Data:

Biaxial (-), a=1.543, b=1.5682, g=1.5688, bire=0.0258

Calculated Properties of Fluorophlogopite

Electron Density:

Bulk Density (Electron Density)=2.80 gm/cc
note: Specific Gravity of Fluorophlogopite =2.84 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Fluorophlogopite}= 2.50 barns/electron
U=PE_{Fluorophlogopite} x r_electron= 7.02 barns/cc.

Radioactivity:

GRapi = 97.80 (Gamma Ray American Petroleum Institute Units)
Concentration of Fluorophlogopite per GRapi unit = 1.02 (%)

Estimated Radioactivity from Fluorophlogopite - barely detectable

Fluorophlogopite Classification

Dana Class:

71.02.02b.01c (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 Fluorophlogopite Information

References:

NAME( AmMin, v92:1601) PHYS. PROP.(AmMin, v92:1601) OPTIC PROP.(AmMin, v92:1601)

See Also:

Links to other databases for Fluorophlogopite :
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

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Print or Cut-and-Paste your Fluorophlogopite Specimen Label here :

Fluorophlogopite

KMg3(AlSi3)O10F2
Dana No: 71.02.02b.01c Strunz No: 09.EC.20
Locality:

Notes: