Parakhinite Mineral Data

Parakhinite Mineral Data +

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General Parakhinite Information

Chemical Formula:

Cu++3PbTe++++++O4(OH)6

Composition:

Molecular Weight = 691.48 gm

Copper 27.57 % Cu 34.51 % CuO

Tellurium 18.45 % Te 23.08 % TeO₂

Hydrogen 0.87 % H 7.82 % H₂O

Lead 29.96 % Pb 32.28 % PbO

Oxygen 23.14 % O

______ ______

100.00 % 97.69 % = TOTAL OXIDE

Empirical Formula:

Cu₃PbTeO₄(OH)₆

IMA Status:

Approved IMA 1978

Locality:

Emerald mine, Tombstone, Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

Named in allusion to its dimorphous relationship to khinite.

Synonym:

ICSD 81604

PDF 29-1420

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Parakhinite Crystallography

Axial Ratios:

a:c = 1:3.1215

Cell Dimensions:

a = 5.753, c = 17.958, Z = 3; V = 514.73 Den(Calc)= 6.69

Crystal System:

Hexagonal - TrapezohedralH-M Symbol (6 2 2) Space Group: P 6₂22 or P 6₄22

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

By Intensity(I/I_o): 2.49(1), 3.336(1), 4.8(0.8),

Crystal Structure:

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Burns P C , Cooper M A , Hawthorne F C , The Canadian Mineralogist , 33 (1995) p.33-40, Parakhinite, Cu3PbTeO6(OH)2: Crystal structure and revision of chemical formula

Physical Properties of Parakhinite

Color:

Dark green.

Density:

6.5 - 6.7, Average = 6.6

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3.5 - Copper Penny

Streak:

green

Optical Properties of Parakhinite

Gladstone-Dale:

CI meas= 0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.026 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.17,KPDmeas= 0.1723,KC= 0.1746

Optical Data:

Uniaxial (-), e=2.12, w=2.155, bire=0.0350.

Calculated Properties of Parakhinite

Electron Density:

r_electron=5.86 gm/cc
note: r_Parakhinite=6.60 gm/cc.

Fermion Index

Fermion Index = 0.08107
Boson Index = 0.91893

Photoelectric:

PE_Parakhinite= 594.91 barns/electron
U=PE_Parakhinite x r_electron=3,486.43 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Parakhinite is Not Radioactive

Parakhinite Classification

Dana Class:

33.2.4.1 (33)Selenates and Tellurates

(33.2)as A+ (B++)m XO6 Zq · x(H2O) where x can equal 0

(33.2.4)Dana Group

33.2.4.1 Parakhinite Cu3PbTeO4(OH)6 P 6₂22 or P 6₄22 6 2 2

Strunz Class:

IV/K.15-50 IV - Oxides

IV/K - Complex Tellurides with [TeO6]6-, [TeO3]2- and [TeO4]2- groups

IV/K.15 - Yafsoanite - Cuzticite series

IV/K.15-10 Frankhawthorneite Cu2TeO4(OH)2 P 2₁/n 2/m

IV/K.15-12 Xocomecatlite Cu3TeO4(OH)4 Unk Ortho

IV/K.15-15 Mcalpineite Cu3TeO6·(H2O) Unk Cubic

IV/K.15-16 Jensenite Cu3TeO6·2(H2O) P 2₁/n 2/m

IV/K.15-18 Leisingite! Cu(Mg,Cu,Fe,Zn)2TeO6·6(H2O) P 31m 3 2/m

IV/K.15-19 Utahite! Cu5Zn3(TeO4)4(OH)8·7(H2O) P1 or P1 Tri

IV/K.15-20 Cuzticite Fe2TeO6·3(H2O) Unk Hex

IV/K.15-30 Yafsoanite Ca3Te2Zn3O12 I a3d 4/m 3 2/m

IV/K.15-40 Khinite PbCu3TeO6(OH)2 F ddd 2/m 2/m 2/m

IV/K.15-50 Parakhinite Cu3PbTeO4(OH)6 P 6₂22 or P 6₄22 6 2 2

IV/K.15-60 Montanite Bi2TeO6·2(H2O) Mono

Other Parakhinite Information

References:

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

See Also:

Links to other databases for Parakhinite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Parakhinite

Cu++3PbTe++++++O4(OH)6
Dana No: 33.2.4.1 Strunz No: IV/K.15-50
Locality:

Notes: