Wonesite Mineral Data

Wonesite Mineral Data +

General Wonesite Information

Chemical Formula:

(Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2

Composition:

Molecular Weight = 403.47 gm

Potassium 0.97 % K 1.17 % K₂O

Sodium 2.28 % Na 3.07 % Na₂O

Magnesium 13.25 % Mg 21.98 % MgO

Aluminum 7.36 % Al 13.90 % Al₂O₃

Iron 5.54 % Fe 7.12 % FeO

Silicon 22.27 % Si 47.65 % SiO₂

Hydrogen 0.37 % H 3.35 % H₂O

Oxygen 45.60 % O

Fluorine 2.35 % F 2.35 % F

- % F -0.99 % -O=F₂

______ ______

100.00 % 99.60 % = TOTAL OXIDE

Empirical Formula:

Na_0.4K_0.1Mg_2.2Fe²⁺_0.4Al_1.1Si_3.2O₁₀(OH)_1.5F_0.5

Environment:

In metavolcanics with high Mg:Fe, moderate sodium, and very little calcium, metamorphosed at an estimated 535 deg. C.

IMA Status:

Approved IMA 1981

Locality:

From Norwich, Windsor Co., Vermont, and elsewhere in the Post Pond Volcanics, southwest corner of the Mt. Cube quadrangle, New Hampshire and Vermont, USA. Link to MinDat.org Location Data.

Name Origin:

Named for petrologist David R. Wones (1932-1984), Professor of Geology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA.

Synonym:

Natriumphlogopite

Sodiumphlogopite

Wonesite Image

Images:

Wonesite

Comments: Dark greenish black micaceous wonesite flake.
Location: Post Pond Volcanics, Wilmount Mountain, Mount Cube Quadrangle, Orange County, Vermont. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wonesite Crystallography

Axial Ratios:

a:b:c =0.5797:1:1.0722

Cell Dimensions:

a = 5.312, b = 9.163, c = 9.825, Z = 2; beta = 103.18° V = 465.62 Den(Calc)= 2.88

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

Crystal Structure:

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Spear F S , Hazen R M , Rumble D , American Mineralogist , 66 (1981) p.100-105, Wonesite: A new rock-forming silicate from the Post Pond Volcanics, Vermont

View Additional jPOWD Structure files for Wonesite
[1]

Physical Properties of Wonesite

Cleavage:

[001] Perfect

Color:

Yellow brown, Dark brown.

Diaphaniety:

Transparent to Translucent

Fracture:

Micaceous - Fracture of flexable micaceous cleavage fragments.

Habit:

Flakes - Flat, thin crystals or aggregates.

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Wonesite

Gladstone-Dale:

CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2037,KC= 0.2059

Optical Data:

Biaxial (-), a=1.544, b=1.608, g=1.608, bire=0.0640, 2V(Calc)=0, 2V(Meas)=0-5.

Calculated Properties of Wonesite

Electron Density:

r_electron=2.86 gm/cc
note: r_Wonesite=2.88 gm/cc.

Fermion Index

Fermion Index = 0.02504
Boson Index = 0.97496

Photoelectric:

PE_Wonesite= 3.14 barns/electron
U=PE_Wonesite x r_electron= 8.98 barns/cc.

Radioactivity:

GRapi = 13.89 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Wonesite - barely detectable

Wonesite Classification

Dana Class:

71.2.2b.14 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.2)with 2:1 Layers

(71.2.2b)Mica Group (Biotite subgroup)

71.2.2b.1 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m

71.2.2b.1a Tetra-ferriphlogopite! KMg3FeSi3O10(OH)2 2/m

71.2.2b.1b Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m

71.2.2b.2 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m

71.2.2b.3 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m

71.2.2b.3a Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m

71.2.2b.4 Tetra-ferri-annite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m

71.2.2b.5 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m

71.2.2b.5a Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m

71.2.2b.6 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m

71.2.2b.7 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono

71.2.2b.8 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m

71.2.2b.8a Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m

71.2.2b.8b Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono

71.2.2b.9 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m

71.2.2b.10 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m

71.2.2b.11 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m

71.2.2b.12 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m

71.2.2b.13 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m

71.2.2b.14 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m

71.2.2b.15 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m

71.2.2b.16 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m

71.2.2b.17 IMA2004-049! NaMg3(AlSi3)O10(OH)2 C 2/m 2/m

Strunz Class:

VIII/H.13-10 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups

VIII/H.13 - Mica group - Glauconite series

VIII/H.13-10 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m

Other Wonesite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Wonesite

(Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2
Dana No: 71.2.2b.14 Strunz No: VIII/H.13-10
Locality:

Notes: