Adamite Mineral Data
General Adamite Information
Chemical Formula:
Zn2(AsO4)(OH)
Composition:
Molecular Weight = 286.71 gm
Zinc 45.61 % Zn 56.78 % ZnO
Arsenic 26.13 % As 40.08 % As2 O5
Hydrogen 0.35 % H 3.14 % H2 O
Oxygen 27.90 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Zn2 (AsO4 )(OH)
IMA Status:
Valid Species (Pre-IMA) 1866
Locality:
Chile, Atacama, Cha�arcillo Link to MinDat.org Location Data.
Name Origin:
Named after the French mineralogist Gilbert Joseph Adam (1795-1881).
Name Pronunciation:
Adamite
Synonym:
Cuproadamite - Cu-bearing adamite
ICSD 34868
PDF 39-1354
Adamite Image
Images:
Adamite
Comments: Sprays of adamite with intense color and well defined crystals which stand out from the matrix.
Location: Ojuela mine, Mapimi, Durango, Mexico.
Scale: 5 x 5 cm.
© Fabre Minerals
Images:
Adamite Crystallography
Axial Ratios:
a:b:c =0.9744:1:0.7089
Cell Dimensions:
a = 8.306, b = 8.524, c = 6.043, Z = 4; V = 427.85 Den(Calc)= 4.45
Crystal System:
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm
X Ray Diffraction:
By Intensity(I/Io ): 2.45(1), 2.97(0.9), 4.9(0.9),
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Physical Properties of Adamite
Cleavage:
{101} Good, {010} Poor
Color:
Yellow, Green, Violet, Pink, Yellowish green.
Density:
4.3 - 4.5, Average = 4.4
Diaphaneity:
Subtransparent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
3.5 - Copper Penny
Luminescence:
Fluorescent and phosphorescent, Short UV=yellow green, Long UV=yellow green.
Luster:
Vitreous - Resinous
Streak:
white
Optical Properties of Adamite
Gladstone-Dale:
CI meas = -0.02 (Excellent) - where the CI = (1-KPDmeas /KC ) CI calc = -0.009 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1667,KPDmeas = 0.1686,KC = 0.1653 Ncalc = 1.71 - 1.74
Optical Data:
Biaxial (+/-), a=1.708-1.722, b=1.742-1.744, g=1.763-1.773, bire=0.0510-0.0550, 2V(Calc)=74-84, 2V(Meas)=88. Dispersion none.
Calculated Properties of Adamite
Electron Density:
Bulk Density (Electron Density)=4.16 gm/cc note: Specific Gravity of Adamite =4.45 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEAdamite = 41.42 barns/electronU=PEAdamite x r Electron Density= 172.31 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Adamite is Not Radioactive
Adamite Classification
Dana Class:
41.06.06.03 (41) Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
(41.06) where (A)2 (XO4) Zq
(41.06.06) Olivenite Group
41.06.06.01 Olivenite Cu2AsO4(OH) P 21 /n 2/m
41.06.06.02 Libethenite Cu2(PO4)(OH) Pnnm 2/m 2/m 2/m
41.06.06.03 Adamite Zn2(AsO4)(OH) Pnnm 2/m 2/m 2/m
41.06.06.04 Eveite Mn2(AsO4)(OH) Pnnm 2/m 2/m 2/m
41.06.06.05 Zincolibethenite ! CuZn(PO4)OH Pnnm 2/m 2/m 2/m
41.06.06.06 Zincolivenite ! CuZn(AsO4)(OH) Pnnm 2/m 2/m 2/m
Strunz Class:
08.BB.30 08 - PHOSPHATES, ARSENATES, VANADATES
08.B - Phosphates, etc. with Additional Anions, without H2O
08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1
08.BB.30 Eveite Mn2(AsO4)(OH) Pnnm 2/m 2/m 2/m
08.BB.30 Adamite Zn2(AsO4)(OH) Pnnm 2/m 2/m 2/m
08.BB.30 Libethenite Cu2(PO4)(OH) Pnnm 2/m 2/m 2/m
08.BB.30 Olivenite Cu2AsO4(OH) P 21 /n 2/m
08.BB.30 Zincolibethenite ! CuZn(PO4)OH Pnnm 2/m 2/m 2/m
08.BB.30 Zincolivenite ! CuZn(AsO4)(OH) Pnnm 2/m 2/m 2/m
Other Adamite Information
References:
NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Sinkankas66)
See Also:
Links to other databases for Adamite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Glendale Community College
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - HyperPhysics
13 - MinDAT
14 - Mineral and Gemstone Kingdom
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - WWW-MINCRYST
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Adamite
Zn2(AsO4)(OH)
Dana No: 41.06.06.03 Strunz No: 08.BB.30
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