Haidingerite Mineral Data

Haidingerite Mineral Data +

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General Haidingerite Information

Chemical Formula:

Ca(AsO3OH)·(H2O)

Composition:

Molecular Weight = 181.01 gm

Calcium 22.14 % Ca 30.98 % CaO

Arsenic 41.39 % As 63.49 % As₂O₅

Hydrogen 1.11 % H 9.95 % H₂O

Oxygen 35.36 % O

______ ______

100.00 % 104.42 % = TOTAL OXIDE

Empirical Formula:

CaAsO₃·(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1827

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 2714

PDF 18-288

Haidingerite Image

Images:

Click Here for Larger Haidingerite Image

Haidingerite Pharmacolite

Comments: Translucent colorless crystalline spherical aggregate of haidingerite with white pharmacolite.
Location: Jachymov, Zapadocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Haidingerite Crystallography

Axial Ratios:

a:b:c =0.4297:1:0.4916

Cell Dimensions:

a = 6.94, b = 16.15, c = 7.94, Z = 8; V = 889.92 Den(Calc)= 2.70

Crystal System:

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

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

By Intensity(I/I_o): 5.22(1), 2.955(0.8), 8.06(0.6),

Forms:

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Forms: [ 0 1 1] [ 0 1 0] [ 5 4 2] [ 4 2 1] [ 1 1 0] [ 1 0 0] [ 1 0 2]

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Crystal Structure:

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Ferraris G , Jones D W , Yerkess J , Acta Crystallographica, Section B , 28 (1972) p.209-214, A neutron and X-ray refinement of the crystal structure of CaHAsO4*H2O (haidingerite), Sample: neutron refinement, Locality: synthetic

View Additional jPOWD Structure files for Haidingerite
[1]

Physical Properties of Haidingerite

Cleavage:

[010] Perfect

Color:

Colorless, White.

Density:

2.95

Diaphaniety:

Transparent to Translucent

Fracture:

Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Vitreous - Adamantine

Streak:

white

Optical Properties of Haidingerite

Gladstone-Dale:

CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.12 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2259,KPDmeas= 0.2068,KC= 0.2017

Optical Data:

Biaxial (+), a=1.59, b=1.602, g=1.638, bire=0.0480, 2V(Calc)=62, 2V(Meas)=58.

Calculated Properties of Haidingerite

Electron Density:

r_electron=2.84 gm/cc
note: r_Haidingerite=2.95 gm/cc.

Fermion Index

Fermion Index = 0.00047
Boson Index = 0.99953

Photoelectric:

PE_Haidingerite= 30.71 barns/electron
U=PE_Haidingerite x r_electron= 87.08 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Haidingerite is Not Radioactive

Haidingerite Classification

Dana Class:

39.1.5.1 (39)Hydrated Acid Phosphates, etc

(39.1)A+ [HXO4] · x(H2O)

(39.1.5)Dana Group

39.1.5.1 Haidingerite Ca(AsO3OH)·(H2O) Pcnb 2/m 2/m 2/m

Strunz Class:

VII/C.24-10 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.24 - Haidingerite - Picropharmacolite series

VII/C.24-10 Haidingerite Ca(AsO3OH)·(H2O) Pcnb 2/m 2/m 2/m

VII/C.24-20 Mcnearite NaCa5H4(AsO4)5·4(H2O) P1,P 1 Tri

VII/C.24-30 Irhtemite Ca4Mg(AsO3OH)2(AsO4)2·4(H2O) Unk Mono

VII/C.24-40 Vladimirite Ca5(AsO3OH)2(AsO4)2·5(H2O) P 2₁/c 2/m

VII/C.24-50 Ferrarisite Ca5(AsO3OH)2(AsO4)2·9(H2O) P1 1

VII/C.24-60 Guerinite Ca5(AsO3OH)2(AsO4)2·9(H2O) P 2₁/n 2/m

VII/C.24-70 Rauenthalite Ca3(AsO4)2·10(H2O) P1 1

VII/C.24-80 Phaunouxite Ca3(AsO4)·11(H2O) P1 1

VII/C.24-90 Picropharmacolite Ca4Mg(AsO3OH)2(AsO4)2·11(H2O) P1 1

Other Haidingerite 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 Haidingerite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 - Franklin Minerals(Dunn) 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Haidingerite

Ca(AsO3OH)·(H2O)
Dana No: 39.1.5.1 Strunz No: VII/C.24-10
Locality:

Notes: