Sampleite Mineral Data

Sampleite Mineral Data +

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General Sampleite Information

Chemical Formula:

NaCaCu5(PO4)4Cl·5(H2O)

Composition:

Molecular Weight = 875.95 gm

Potassium 1.34 % K 1.61 % K₂O

Sodium 2.36 % Na 3.18 % Na₂O

Calcium 4.12 % Ca 5.76 % CaO

Magnesium 0.28 % Mg 0.46 % MgO

Copper 34.82 % Cu 39.21 % Cu₂O

Phosphorus 14.14 % P 32.41 % P₂O₅

Hydrogen 1.08 % H 9.67 % H₂O

Chlorine 4.05 % Cl 4.05 % Cl

- % Cl -0.91 % -O=Cl₂

Oxygen 37.81 % O

______ ______

100.00 % 95.43 % = TOTAL OXIDE

Empirical Formula:

Na_0.9K_0.3Ca_0.9Mg_0.1Cu_4.8(PO₄)₄Cl·4.7(H₂O)

Environment:

Oxidized zone of copper deposits in arid climates. In caves derived from copper sulfides and phosphate from bat quano.

IMA Status:

Valid Species (Pre-IMA) 1942

Locality:

Antofagasta, Chuquicamata, Chile. Link to MinDat.org Location Data.

Name Origin:

Named for Mat Sample, mine superintendent, Chuquicamata, Chile.

Sampleite Image

Images:

Sampleite

Comments: Sampleite crystal groups 3 to 8 mm wide on a dark matrix.
Location: Santa Catalina Mine, Sierra Gorda, Chile. Scale: Picture size 1 cm.
© John Veevaert

Images:

Sampleite

Comments: Sky blue lamellar crystals of sampleite up to 2 mm. scattered on matrix.
Location: Chuquicamata, Antofagasta, Chile. Scale: Picture size 2 cm.
© Minernet

Images:

Sampleite

Comments: Blue, spherical, radial crystalling aggregates of sampleite on a fracture surface.
Location: North Parkes Mine, Parkes, New South Wales, Australia. Scale: Picture size 6x5 cm.
© Dave Barthelmy

Sampleite Crystallography

Axial Ratios:

a:b:c =0.2526:1:0.2513

Cell Dimensions:

a = 9.7, b = 38.4, c = 9.65, Z = 8; V = 3,594.43 Den(Calc)= 3.24

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: pseudo TET

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

By Intensity(I/I_o): 9.6(1), 3.04(1), 1.71(0.8),4.3(0.8), 1.79(0.7), 3.89(0.7), 6.85(0.7),

Forms:

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Forms: [ 1 5 0] [ 0 1 0] [ 1 1 1] [ 1 1 0] [ 0 2 1] [ 0 0 1]

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Physical Properties of Sampleite

Cleavage:

[010] Perfect, [100] Good, [001] Good

Color:

Bluish green, Light blue.

Density:

3.2

Diaphaniety:

Transparent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Hardness:

4 - Fluorite

Luster:

Pearly

Streak:

bluish white

Optical Properties of Sampleite

Gladstone-Dale:

CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2042,KPDmeas= 0.2068,KC= 0.2189

Optical Data:

Biaxial (-), a=1.629, b=1.677, g=1.679, bire=0.0500, 2V(Calc)=22, 2V(Meas)=5-23. Dispersion r > v.

Pleochroism (x):

deep blue or green blue.

Pleochroism (y):

light blue or turquoise blue.

Pleochroism (z):

turquoise blue or colorless.

Calculated Properties of Sampleite

Electron Density:

r_electron=3.11 gm/cc
note: r_Sampleite=3.20 gm/cc.

Fermion Index

Fermion Index = 0.00051
Boson Index = 0.99949

Photoelectric:

PE_Sampleite= 16.75 barns/electron
U=PE_Sampleite x r_electron= 52.14 barns/cc.

Radioactivity:

GRapi = 18.80 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Sampleite - barely detectable

Sampleite Classification

Dana Class:

42.9.4.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.9)where (A)3 (XO4)2 Zq · x(H2O)

(42.9.4)Dana Group

42.9.4.1 Sampleite NaCaCu5(PO4)4Cl·5(H2O) pseudo TET 2/m 2/m 2/m

42.9.4.2 Lavendulan NaCaCu5(AsO4)4Cl·5(H2O) Unk Ortho

42.9.4.3 Zdenekite NaPbCu5(AsO4)4Cl·5(H2O) P 4₁22,P 4₃22 4 2 2

42.9.4.4 Mahnertite! (Na,Ca)Cu3(AsO4)2Cl·5(H2O) I 4mmm 4 2 2

42.9.4.5 Lemanskiite! NaCaCu5(AsO4)4Cl·5(H2O) P 4₁22 or P 4₃22 Tetra

Strunz Class:

VII/D.25-10 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K

VII/D.25 - Lavendulan series

VII/D.25-10 Sampleite NaCaCu5(PO4)4Cl·5(H2O) pseudo TET 2/m 2/m 2/m

VII/D.25-20 Lavendulan NaCaCu5(AsO4)4Cl·5(H2O) Unk Ortho

VII/D.25-22 Zinclavendulan* NaCa(Zn,Cu)5(AsO4)4Cl·4-5(H2O) Unk Ortho

VII/D.25-24 Lemanskiite! NaCaCu5(AsO4)4Cl·5(H2O) P 4₁22 or P 4₃22 Tetra

VII/D.25-25 Zdenekite NaPbCu5(AsO4)4Cl·5(H2O) P 4₁22,P 4₃22 4 2 2

VII/D.25-27 Mahnertite! (Na,Ca)Cu3(AsO4)2Cl·5(H2O) I 4mmm 4 2 2

VII/D.25-30 Shubnikovite Ca2Cu8(AsO4)6Cl(OH)·7(H2O)(?) Unk Ortho

VII/D.25-33 Goldquarryite! (Cu,[])(Cd,Ca)2Al3(PO4)4F2(H2O)10{(H2O,F)}2 P1 1

VII/D.25-35 Andyrobertsite! KCdCu5(AsO4)4[As(OH)2O2]·2(H2O) P 2₁/m 2/m

VII/D.25-36 Calcio-andyrobertsite-1M! KCaCu5(AsO4)4[As(OH)2O2]·2(H2O) P 2₁/m 2/m

VII/D.25-36* Calcio-andyrobertsite-2O! KCaCu5(AsO4)4[As(OH)2O2]·2(H2O) P nma 2/m 2/m 2/m

VII/D.25-38 Esperanzaite! NaCa2Al2(AsO4)2F4(OH)·2(H2O) P 2₁/m 2/m

VII/D.25-40 Englishite K3Na2Ca10Al15(PO4)21(OH)7·26(H2O) A2 or Aa 2

Other Sampleite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4)

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Sampleite

NaCaCu5(PO4)4Cl·5(H2O)
Dana No: 42.9.4.1 Strunz No: VII/D.25-10
Locality:

Notes: