Aspidolite Mineral Data

General Aspidolite Information

Chemical Formula:

NaMg3AlSi3O10(OH)2

Composition:

Molecular Weight = 410.89 gm

Potassium 0.95 % K 1.15 % K₂O

Sodium 5.04 % Na 6.79 % Na₂O

Magnesium 13.43 % Mg 22.27 % MgO

Titanium 0.58 % Ti 0.97 % TiO₂

Aluminum 12.15 % Al 22.95 % Al₂O₃

Iron 3.13 % Fe 4.02 % FeO

Silicon 17.50 % Si 37.43 % SiO₂

Hydrogen 0.48 % H 4.32 % H₂O

Oxygen 46.61 % O

Fluorine 0.14 % F 0.14 % F

- % F -0.06 % -O=F₂

______ ______

100.00 % 99.98 % = TOTAL OXIDE

Empirical Formula:

Na_0.9K_0.1Mg_2.27Al_0.41Fe²⁺_0.23Ti_0.05Al_1.44Si_2.56O₁₀(OH)_1.97F_0.03

Environment:

Found in Zone 4 (forsterite-diopside) of the contact aureole around the Kaizuki-yama granite. Renamed in 1998 from sodiumphlogopite by the IMA Mica commission. 1M polytype.

IMA Status:

Approved IMA 1980

Locality:

Found in waste rock in the Kawai pit of the Kasuga mine. Kasuga-mura, Gifu Prefecture, central Japan. Link to MinDat.org Location Data.

Name Origin:

The name is from the Greek "aspisidos", like a shield, alluding to the appearance of its crystals.

Name Pronunciation:

Aspidolite + Pronunciation

Synonym:

IMA2004-049

Natriumphlogopite - Renamed to Aspidolite - NOMENCLATURE OF THE MICAS, Thz Canadian Mineralogist, Vol. 36, pp. 90s-912 (1998)

Phlogopite-Na - Renamed to Aspidolite - NOMENCLATURE OF THE MICAS, Thz Canadian Mineralogist, Vol. 36, pp. 90s-912 (1998)

Sodium phlogopite - Renamed to Aspidolite - NOMENCLATURE OF THE MICAS, Thz Canadian Mineralogist, Vol. 36, pp. 90s-912 (1998)

Sodiumphlogopite

Aspidolite Image

Images:

Aspidolite

Comments: B&W thin section (PPL) of a clinopyroxene leuconorite showing Na-rich phlogopite surrounding corroded plagioclase (Pl). (AmMin, v86:29).
Location: Gabbroic crustal zenoliths form Volcan San Pedro, Chilean Andes. Scale: See Image.
© American Mineralogist

Aspidolite Crystallography

Axial Ratios:

a:b:c =0.5776:1:1.1048

Cell Dimensions:

a = 5.291, b = 9.16, c = 10.12, Z = 2; beta = 105.1° V = 473.54 Den(Calc)= 2.88

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): 2.62(1)(201,131,130,2009.73(0.8)(100 3.26(0.4)(003 4.57(0.4)(020,110,110 2.55(0.3)(023,131,113,12.45(0.2)(132

Physical Properties of Aspidolite

Cleavage:

{001} Perfect

Color:

Light brown, White, Greenish, Red.

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

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

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Aspidolite

Gladstone-Dale:

CI calc= 0.098 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1904,KC= 0.2112
Ncalc = 1.61

Optical Data:

Biaxial (-), a=1.53, b=1.557, g=1.558, bire=0.0280

Calculated Properties of Aspidolite

Electron Density:

Bulk Density (Electron Density)=2.86 gm/cc
note: Specific Gravity of Aspidolite =2.88 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Aspidolite= 2.52 barns/electron
U=PE_Aspidolite x r_electron= 7.20 barns/cc.

Radioactivity:

GRapi = 13.62 (Gamma Ray American Petroleum Institute Units)
Concentration of Aspidolite per GRapi unit = 7.34 (%)

Estimated Radioactivity from Aspidolite - barely detectable

Aspidolite Classification

Dana Class:

71.02.02b.13 (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 Aspidolite Information

References:

NAME( AmMin, v91, p1208) PHYS. PROP.(AmMin, v91:1208 & MinMag, v69:1047) OPTIC PROP.(AmMin, v91, p1208)

See Also:

Links to other databases for Aspidolite :
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 Aspidolite Specimen Label here :

Aspidolite

NaMg3AlSi3O10(OH)2
Dana No: 71.02.02b.13 Strunz No: 09.EC.20
Locality:

Notes: