Verplanckite Mineral Data

General Verplanckite Information

Chemical Formula:

Ba2(Mn++,Ti,Fe++)2Si2O6(O,OH,Cl,F)2•3(H2O)

Composition:

Molecular Weight = 585.36 gm

Barium 46.92 % Ba 52.39 % BaO

Titanium 0.82 % Ti 1.36 % TiO₂

Manganese 6.57 % Mn 8.48 % MnO

Iron 1.91 % Fe 2.45 % FeO

Silicon 9.60 % Si 20.53 % SiO₂

Hydrogen 1.21 % H 10.77 % H₂O

Chlorine 3.63 % Cl 3.63 % Cl

- % Cl -0.82 % -O=Cl₂

Oxygen 28.70 % O

Fluorine 0.65 % F 0.65 % F

- % F -0.27 % -O=F₂

______ ______

100.00 % 99.18 % = TOTAL OXIDE

Empirical Formula:

Ba₂Mn²⁺_0.7Fe²⁺_0.2Ti_0.1Si₂O_6.5(OH)Cl_0.6F_0.2·3(H₂O)

Environment:

Near the contact between meta-sediments and biotite-bearing quartz diorite.

IMA Status:

Approved IMA 1965

Locality:

Big Creek - Rush Creek sanbornite deposit, 5 miles NE of Trimmer, Fresno Co., California. Link to MinDat.org Location Data.

Name Origin:

Named for William E. VerPlanck (1916-1963), American geologist, California Division of Mines & Geology.

Name Pronunciation:

Verplanckite + Pronunciation

Synonym:

ICSD 2627

PDF 18-175

Verplanckite Image

Images:

Verplanckite

Comments: Orange translucent verplanckite in sanbornite.
Location: Esquire #7 Mine, Big Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Verplanckite Crystallography

Axial Ratios:

a:c = 1:0.43907

Cell Dimensions:

a = 16.398, c = 7.2, Z = 6; V = 1,676.66 Den(Calc)= 3.48

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.95(1), 2.738(0.7), 2.97(0.7),

Crystal Structure:

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Kampf A R , Khan A A , Baur W H , Acta Crystallographica, Section B , 29 (1973) p.2019-2021, Barium chloride silicate with an open framework: verplanckite, Locality: Esquire No. 7 mine, Big Creek, Fresno County, California, USA

Physical Properties of Verplanckite

Cleavage:

{1120} Good, {0001} Indistinct

Color:

Brownish yellow, Brownish orange.

Density:

3.52

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Vitreous (Glassy)

Streak:

light orange

Optical Properties of Verplanckite

Dichroism (e):

colorless.

Dichroism (w):

orange yellow.

Gladstone-Dale:

CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.053 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1947,KPDmeas= 0.1925,KC= 0.1849
Ncalc = 1.64 - 1.65

Optical Data:

Uniaxial (-), e=1.672, w=1.683, bire=0.0110.

Calculated Properties of Verplanckite

Electron Density:

Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Verplanckite =3.52 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Verplanckite= 208.68 barns/electron
U=PE_Verplanckite x rElectron Density= 672.37 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Verplanckite is Not Radioactive

Verplanckite Classification

Dana Class:

77.02.08.01 (77)Tectosilicate Zeolite group

(77.02)related species

(77.02.08)Dana Group

77.02.08.01 Verplanckite Ba2(Mn,Ti,Fe)2Si2O6(O,OH,Cl,F)2•3(H2O) P 6/mmm 6/m 2/m 2/m

Strunz Class:

09.CE.10 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),

09.CE.10 Verplanckite Ba2(Mn,Ti,Fe)2Si2O6(O,OH,Cl,F)2•3(H2O) P 6/mmm 6/m 2/m 2/m

Other Verplanckite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Verplanckite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ask about Verplanckite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Verplanckite

Ba2(Mn++,Ti,Fe++)2Si2O6(O,OH,Cl,F)2•3(H2O)
Dana No: 77.02.08.01 Strunz No: 09.CE.10
Locality:

Notes: