Adamite Mineral Data

Adamite Mineral Data +

[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974

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 % As₂O₅

Hydrogen 0.35 % H 3.14 % H₂O

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, Chañarcillo Link to MinDat.org Location Data.

Name Origin:

Named after the French mineralogist Gilbert Joseph Adam (1795-1881).

Synonym:

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 Cryptomelane

Comments: Black, rounded balls of cryptomelane and purple, transparent adamite.
Location: Ojuela mine, Mapimi, Druango, Mexico. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm

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

By Intensity(I/I_o): 2.45(1), 2.97(0.9), 4.9(0.9),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

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

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Hill R J , American Mineralogist , 61 (1976) p.979-986, The crystal structure and infrared properties of adamite

View Additional jPOWD Structure files for Adamite
[1]

Physical Properties of Adamite

Cleavage:

[101] Good, [010] Poor

Color:

Yellow, Green, Violet, Pink, Yellowish green.

Density:

4.3 - 4.5, Average = 4.4

Diaphaniety:

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.

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

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:

r_electron=4.16 gm/cc
note: r_Adamite=4.45 gm/cc.

Fermion Index

Fermion Index = 0.01883
Boson Index = 0.98117

Photoelectric:

PE_Adamite= 41.42 barns/electron
U=PE_Adamite x r_electron= 172.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Adamite is Not Radioactive

Adamite Classification

Dana Class:

41.6.6.3 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.6)where (A)2 (XO4) Zq

(41.6.6)Dana Group

41.6.6.1 Olivenite Cu2AsO4(OH) P 2₁/n 2/m

41.6.6.2 Libethenite Cu2(PO4)(OH) Pnnm 2/m 2/m 2/m

41.6.6.3 Adamite Zn2(AsO4)(OH) Pnnm 2/m 2/m 2/m

41.6.6.4 Eveite Mn2(AsO4)(OH) Pnnm 2/m 2/m 2/m

41.6.6.5 Zincolibethenite! CuZn(PO4)OH Pnnm 2/m 2/m 2/m

Strunz Class:

VII/B.06-30 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.06 - Adamite group, Libethenite - Paradamite

VII/B.06-10 Libethenite Cu2(PO4)(OH) Pnnm 2/m 2/m 2/m

VII/B.06-20 Olivenite Cu2AsO4(OH) P 2₁/n 2/m

VII/B.06-30 Adamite Zn2(AsO4)(OH) Pnnm 2/m 2/m 2/m

VII/B.06-40 Eveite Mn2(AsO4)(OH) Pnnm 2/m 2/m 2/m

VII/B.06-50 Tarbuttite Zn2(PO4)(OH) P1 1

VII/B.06-60 Paradamite Zn2(AsO4)(OH) P1 1

Other Adamite Information

References:

NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) 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 - Glendale Community College
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 - MinDAT
13 - MinMax(Deutsch)
14 - MinMax(English)
15 - Mineral and Gemstone Kingdom
16 - Mineralienatlas (Deutsch)
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - WWW-MINCRYST

Search for Adamite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Adamite :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

The GeoZone

Wrights Rock Shop

Translate Adamite Mineral Data :

Ask about Adamite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Adamite

Zn2(AsO4)(OH)
Dana No: 41.6.6.3 Strunz No: VII/B.06-30
Locality:

Notes: