Pharmacolite Mineral Data

Pharmacolite Mineral Data
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General Pharmacolite Information

Help on Chemical Formula: Chemical Formula: CaHAsO4•2(H2O)
Help on Composition: Composition: Molecular Weight = 216.04 gm
   Calcium   18.55 %  Ca   25.96 % CaO
   Arsenic   34.68 %  As   53.19 % As2O5
   Hydrogen   2.33 %  H    20.85 % H2O
   Oxygen    44.44 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaH(AsO4)•2(H2O)
Help on Environment: Environment: Secondary mineral which forms in the presence of arsenide-bearing minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1800
Help on Locality: Locality: Wittichen, Schwarzwald, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, farmakon, "poison" and lithos, "stone."
Help on Name Pronunciation: Name Pronunciation: Pharmacolite Say PHARMACOLITE
Help on Synonym: Synonym: ICSD 16246
  PDF 25-138
 

Pharmacolite Image

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Pharmacolite

Comments: Pink, fuzzy ball of pharmacolite crystals on matrix.
Location: Schneeberg, Saxony, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Pharmacolite   Haidingerite

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

Pharmacolite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.3891:1:0.4151
Help on Cell Dimensions: Cell Dimensions: a = 5.959, b = 15.313, c = 6.357, Z = 4; beta = 114.67° V = 527.13 Den(Calc)= 2.72
Help on Crystal System: Crystal System: Monoclinic - DomaticH-M Symbol (m) Space Group: Ia
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.09(1), 4.32(1), 2.71(0.9),
Help on Forms: Forms:

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Forms: ( 0 1 0) ( 1 3 2) ( 1 1 2) ( 0 1 1) ( 1 1 0)

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Ferraris G , Jones D W , Yerkess J , Acta Crystallographica, Section B , 27 (1971) p.349-354, Determination of hydrogen atom positions in the crystal structure of, pharmacolite, CaHAsO4(H2O)2, by neutron diffraction, Locality: Andreasberg, Harz Mts, Lower Saxony, Germany

 

Physical Properties of Pharmacolite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: White, Yellow, Reddish white, Grayish white.
Help on Density: Density: 2.6 - 2.73, Average = 2.66
Help on Diaphaneity: Diaphaneity: Translucent to opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Pharmacolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2164,KPDmeas= 0.2209,KC= 0.2116
Ncalc = 1.55 - 1.58
Help on Optical Data: Optical Data: Biaxial (-), a=1.583, b=1.589, g=1.594, bire=0.0110, 2V(Calc)=84, 2V(Meas)=77. Dispersion none.
 

Calculated Properties of Pharmacolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.67 gm/cc
note: Specific Gravity of Pharmacolite =2.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0004672354
Boson Index = 0.9995327646
Help on Photoelectric: Photoelectric: PEPharmacolite = 25.27 barns/electron
U=PEPharmacolite x rElectron Density= 67.46 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pharmacolite is Not Radioactive
 

Pharmacolite Classification
Help on Dana Class: Dana Class: 39.01.01.02 (39)Hydrated Acid Phosphates, etc
  (39.01)A+ [HXO4] · x(H2O)
  (39.01.01)Dana Group
 
39.01.01.01 Brushite CaHPO4•2(H2O) I2/a 2/m
 
39.01.01.02 Pharmacolite CaHAsO4•2(H2O) Ia m
Help on Strunz Class: Strunz Class: 08.CJ.50 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CJ -With only large cations
 
08.CJ.50 Ardealite Ca2(SO4)(HPO4)•4(H2O) Cc m
 
08.CJ.50 Brushite CaHPO4•2(H2O) I2/a 2/m
 
08.CJ.50 Churchite-(Dy)* (Dy,Sm,Gd,Nd)(PO4)•2(H2O) Mono
 
08.CJ.50 Churchite-(Nd)! Nd(PO4)•2(H2O) Mono
 
08.CJ.50 Churchite-(Y) YPO4•2(H2O) A2/a,Aa Mono
 
08.CJ.50 Pharmacolite CaHAsO4•2(H2O) Ia m
 

Other Pharmacolite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Pharmacolite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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

Pharmacolite

CaHAsO4•2(H2O)
Dana No: 39.01.01.02 Strunz No: 08.CJ.50
Locality:

 

Notes: