Paceite Mineral Data

Paceite Mineral Data

General Paceite Information

Chemical Formula:

CaCu(CH3COO)4·6(H2O)

Composition:

Molecular Weight = 447.89 gm

Calcium 8.95 % Ca

Copper 14.19 % Cu

Hydrogen 5.40 % H

Carbon 21.45 % C

Oxygen 50.01 % O

______

100.00 %

Empirical Formula:

CaCuC₈H₁₂O₈·6(H₂O)

Environment:

Secondary mineral in a gossen in contact with decaying leaf litter.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Potosi open pit, Broken Hill, New South Wales, Australia. Link to MinDat.org Location Data.

Name Origin:

Named for Frank L Pace (1948-), who discovered the mineral.

Synonym:

IMA2001-030

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Paceite Crystallography

Axial Ratios:

a:c = 1:1.45549

Cell Dimensions:

a = 11.155, c = 16.236, Z = 4; V = 2,020.31 Den(Calc)= 1.47

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4/m

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

By Intensity(I/I_o): 7.896(1)(110), 3.5(0.2)(310,204,312), 5.586(0.15)(200),8.132(0.08)(002), 9.297(0.06)(101), 2.497(0.04), 3.042(0.03),

Physical Properties of Paceite

Cleavage:

[100] Perfect, [110] Perfect

Color:

Dark blue.

Diaphaniety:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Water Soluble - Water soluble mineral.

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Vitreous (Glassy)

Streak:

pale blue

Optical Properties of Paceite

Optical Data:

Uniaxial (+), w=1.439, e=1.482, bire=0.0430.

Calculated Properties of Paceite

Electron Density:

r_electron=1.53 gm/cc
note: r_Paceite=1.47 gm/cc.

Fermion Index

Fermion Index = 0.00272
Boson Index = 0.99728

Photoelectric:

PE_Paceite= 7.01 barns/electron
U=PE_Paceite x r_electron= 10.71 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Paceite is Not Radioactive

Paceite Classification

Dana Class:

50.2.7.2 (50)Salts of Organic Acids

(50.2)(Mellitates, Citrates, Cyanates, and Acetates)

(50.2.7)Dana Group

50.2.7.1 Hoganite! Cu(CH3COO)2·H2O C 2/c 2/m

50.2.7.2 Paceite ! CaCu(CH3COO)4·6(H2O) I 4/m 4/m

Strunz Class:

IX/A.02-18 IX - Organic compunds

IX/A - Salts from organic acids. Other organic salts, a.o. mellates and citrates.

IX/A.02 - Mellite - Abelsonite (?) series

IX/A.02-03 Dashkovaite! Mg(HCOO)2·2(H2O) P 2₁/c 2/m

IX/A.02-05 Formicaite! Ca(HCOO)2 P 4₁2₁2 4 2 2

IX/A.02-10 Mellite Al2[C6(COO)6]·16(H2O) P 4₁22,P 4₃22 4 2 2

IX/A.02-16 Hoganite! Cu(CH3COO)2·H2O C 2/c 2/m

IX/A.02-18 Paceite CaCu(CH3COO)4·6(H2O) I 4/m 4/m

IX/A.02-20 Calclacite Ca[Cl2/CH3COO]·10(H2O) P 2₁/a 2/m

IX/A.02-30 Earlandite Ca3(C6H5O7)·4(H2O) Unk Mono

IX/A.02-40 Kafehydrocyanite* K4Fe(CN)6·3(H2O) I 4₁/a 4/m

IX/A.02-50 Julienite* Na2Co(SCN)4·8(H2O) P 4₁/n 4/m

IX/A.02-60 Abelsonite NiC31H32N4 P1 or P1 Tri

Other Paceite Information

References:

NAME( AmMin, Vol 88, p 476) PHYS. PROP.(AmMin, Vol 88, p 476) OPTIC PROP.(AmMin, Vol 88, p 476)

See Also:

Links to other databases for Paceite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 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

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

Paceite

CaCu(CH3COO)4·6(H2O)
Dana No: 50.2.7.2 Strunz No: IX/A.02-18
Locality:

Notes: