Paradamite Mineral Data

Paradamite Mineral Data +

[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery]
John Betts - Fine Minerals
Classic minerals, out-of-print books & magazines, plus informative articles for collectors

General Paradamite 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)

Environment:

Secondary mineral in the oxidized sone of a Ag-Pb-Zn mine.

IMA Status:

Valid Species (Pre-IMA) 1956

Locality:

Ojuela mine, Mapimi, Durango, Mexico Link to MinDat.org Location Data.

Name Origin:

Named as the dimorph of adamite.

Paradamite Image

Images:

Paradamite

Comments: Yellow paradamite crystals on a gossanous matrix.
Location: Ojuela mine, Mapimi, Druango, Mexico. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Paradamite Crystallography

Axial Ratios:

a:b:c =0.8687:1:0.8416

Cell Dimensions:

a = 5.83, b = 6.711, c = 5.648, Z = 2; alpha = 104.73°, beta = 92.26°, gamma = 76.81° V = 207.92 Den(Calc)= 4.58

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 3.698(1), 2.838(0.99), 2.994(0.96),

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

Bennett T J , American Mineralogist , 65 (1980) p.353-354, Crystal structure of paradamite

Physical Properties of Paradamite

Cleavage:

[010] Perfect

Color:

Light yellow.

Density:

4.55

Diaphaniety:

Transparent

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Paradamite

Gladstone-Dale:

CI meas= -0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1657,KPDmeas= 0.1668,KC= 0.1653

Optical Data:

Biaxial (-), a=1.726, b=1.771, g=1.78, bire=0.0540, 2V(Calc)=46, 2V(Meas)=50.

Calculated Properties of Paradamite

Electron Density:

r_electron=4.28 gm/cc
note: r_Paradamite=4.58 gm/cc.

Fermion Index

Fermion Index = 0.01883
Boson Index = 0.98117

Photoelectric:

PE_Paradamite= 41.42 barns/electron
U=PE_Paradamite x r_electron= 177.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Paradamite is Not Radioactive

Paradamite Classification

Dana Class:

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

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

(41.6.7)Dana Group

41.6.7.1 Tarbuttite Zn2(PO4)(OH) P1 1

41.6.7.2 Paradamite Zn2(AsO4)(OH) P1 1

Strunz Class:

VII/B.06-60 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 Paradamite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Paradamite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineral and Gemstone Kingdom
14 - Mineralienatlas (Deutsch)
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

Search for Paradamite using:

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

Visit our Advertisers for Paradamite :

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 Paradamite Mineral Data :

Ask about Paradamite 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 Paradamite Specimen Label here :

Paradamite

Zn2(AsO4)(OH)
Dana No: 41.6.7.2 Strunz No: VII/B.06-60
Locality:

Notes: