Lavendulan Mineral Data (original) (raw)
General Lavendulan Information
Chemical Formula:
NaCaCu5(AsO4)4Cl•5(H2O)
Composition:
Molecular Weight = 1,062.00 gm
Sodium 2.16 % Na 2.92 % Na2O
Calcium 3.77 % Ca 5.28 % CaO
Copper 29.92 % Cu 37.45 % CuO
Arsenic 28.22 % As 43.28 % As2O5
Hydrogen 0.95 % H 8.48 % H2O
Chlorine 3.34 % Cl 3.34 % Cl
Oxygen 31.64 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
NaCaCu5(AsO4)4Cl•5(H2O)
Environment:
Secondary mineral in Cu-As deposits.
IMA Status:
Valid Species (Pre-IMA) 1837
Locality:
Jachimov, Bohemia, Czech Republic. Link to MinDat.org Location Data.
Name Origin:
Named for the color (lavender blue).
Name Pronunciation:
Lavendulan + Pronunciation 
Synonym:
Zinclavendulan
Lavendulan Image
Images:
Lavendulan Crystallography
Axial Ratios:
a:b:c =0.2429:1:0.2473
Cell Dimensions:
a = 9.815, b = 40.394, c = 9.99, Z = 8; V = 3,960.71 Den(Calc)= 3.56
Crystal System:
OrthorhombicSpace Group: Unk
X Ray Diffraction:
By Intensity(I/Io): 9.77(1), 3.11(0.7), 4.87(0.5),
Crystal Structure:
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| | Giester G , Kolitsch U , Leverett P , Turner P , Williams P A , European Journal of Mineralogy , 19 (2007) p.75-93, The crystal structures of lavendulan, sampleite, and a new polymorph of sampleite, Locality: Hilarion mine, Lavrion, Greece | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Lavendulan
Cleavage:
{010} Perfect, {110} Indistinct
Color:
Blue, Lavender blue, Greenish blue.
Density:
3.54
Diaphaneity:
Translucent
Fracture:
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:
Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Hardness:
2.5 - Finger Nail
Luster:
Vitreous - Waxy
Streak:
light blue
Optical Properties of Lavendulan
Gladstone-Dale:
CI meas= -0.046 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1975,KPDmeas= 0.1986,KC= 0.1898
Ncalc = 1.67 - 1.68
Optical Data:
Biaxial (-), a=1.66, b=1.715, g=1.734, bire=0.0740, 2V(Calc)=58, 2V(Meas)=33.
Calculated Properties of Lavendulan
Electron Density:
Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Lavendulan =3.56 gm/cc.
Fermion Index:
Fermion Index = 0.0002042283
Boson Index = 0.9997957717
Photoelectric:
PELavendulan = 33.35 barns/electron
U=PELavendulan x rElectron Density= 112.48 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lavendulan is Not Radioactive
Lavendulan Classification
Dana Class:
42.09.04.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.09)where (A)3 (XO4)2 Zq � x(H2O)
(42.09.04)Dana Group
42.09.04.01 Sampleite NaCaCu5(PO4)4Cl•5(H2O) pseudo TET 2/m 2/m 2/m
42.09.04.02 Lavendulan NaCaCu5(AsO4)4Cl•5(H2O) Unk Ortho
42.09.04.03 Zdenekite NaPbCu5(AsO4)4Cl•5(H2O) P 4122,P 4322 4 2 2
42.09.04.04 Mahnertite! (Na,Ca)Cu3(AsO4)2Cl•5(H2O) I 4mmm 4 2 2
42.09.04.05 Lemanskiite! NaCaCu5(AsO4)4Cl•5H2O P 4122 or P 4322 4 2 2
Strunz Class:
08.DG.05 08 - PHOSPHATES, ARSENATES, VANADATES
08.D - Phosphates, etc
08.DG -With large and medium-sized cations, (OH, etc.):RO4 < 0.5:1
08.DG.05 Lavendulan NaCaCu5(AsO4)4Cl•5(H2O) Unk Ortho
08.DG.05 Shubnikovite Ca2Cu8(AsO4)6Cl(OH)•7(H2O)(?) Unk Ortho
08.DG.05 Sampleite NaCaCu5(PO4)4Cl•5(H2O) pseudo TET 2/m 2/m 2/m
08.DG.05 Zinclavendulan? NaCa(Zn,Cu)5(AsO4)4Cl•4-5(H2O) Unk Ortho
08.DG.05 Lemanskiite! NaCaCu5(AsO4)4Cl•5H2O P 4122 or P 4322 4 2 2
08.DG.05 Zdenekite NaPbCu5(AsO4)4Cl•5(H2O) P 4122,P 4322 4 2 2
Other Lavendulan Information
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Lavendulan :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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Ask about Lavendulan here :
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Print or Cut-and-Paste your Lavendulan Specimen Label here :
Lavendulan
NaCaCu5(AsO4)4Cl•5(H2O)
Dana No: 42.09.04.02 Strunz No: 08.DG.05
Locality:
Notes: