Verplanckite Mineral Data

Verplanckite Mineral Data +

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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.

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

Optical Data:

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

Calculated Properties of Verplanckite

Electron Density:

r_electron=3.22 gm/cc
note: r_Verplanckite=3.52 gm/cc.

Fermion Index

Fermion Index = 0.0897
Boson Index = 0.9103

Photoelectric:

PE_Verplanckite= 208.68 barns/electron
U=PE_Verplanckite x r_electron= 672.37 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Verplanckite is Not Radioactive

Verplanckite Classification

Dana Class:

77.2.8.1 (77)Tectosilicate Zeolite group

(77.2)related species

(77.2.8)Dana Group

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

Strunz Class:

VIII/E.08-05 VIII - Silicates

VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8-

VIII/E.08 - Joaquinite group, Baotite - Orthojoaquinite-(Ce) series

VIII/E.08-05 Verplanckite Ba2(Mn,Ti,Fe)2Si2O6(O,OH,Cl,F)2·3(H2O) P 6/mmm 6/m 2/m 2/m

VIII/E.08-10 Baotite Ba4(Ti,Nb)8Si4O28Cl I 4₁/a 4/m

VIII/E.08-15 Cerchiaraite! Ba4(Mn,Fe,Al)4Si6(O,OH,Cl)26 I 4/mmm 4/m 2/m 2/m

VIII/E.08-20 Titantaramellite Ba4(Ti,Fe,Fe,Mg)4(B2Si8O27)O2ClxX=0TO1,withTi>Fe Pmmn 2/m 2/m 2/m

VIII/E.08-30 Taramellite Ba4(Fe,Ti,Fe,Mg)4(B2Si8O27)O2Clx(x=0to1) Pmmn 2/m 2/m 2/m

VIII/E.08-40 Nagashimalite Ba4(V,Ti)4Si8B2O27Cl(O,OH)2 Pmmn 2/m 2/m 2/m

VIII/E.08-50 Strontiojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2·(H2O) C 2 2

VIII/E.08-60 Strontio-orthojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2·(H2O) Pbcm or Pbc2 Ortho

VIII/E.08-70 Bario-orthojoaquinite Fe2(Ba,Sr)4Ti2[Si4O12]O2·(H2O) Ccmm or Ccm2 Ortho

VIII/E.08-80 Joaquinite-(Ce) NaFeBa2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)·(H2O) C 2 2

VIII/E.08-89 Orthojoaquinite-(La)! Ba2Na(La,Ce)2FeTi2Si8O26(OH,O,F)·H2O Ccmm 2/m 2/m 2/m

VIII/E.08-90 Orthojoaquinite-(Ce) NaFeBa2Ce2Ti2[Si4O12]2O2(OH)·(H2O) Ccmm or Ccm21 Ortho

Other Verplanckite Information

References:

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

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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: 77.2.8.1 Strunz No: VIII/E.08-05
Locality:

Notes: