Picropharmacolite Mineral Data

Picropharmacolite Mineral Data
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General Picropharmacolite Information

Help on Chemical Formula: Chemical Formula: Ca4Mg(AsO3OH)2(AsO4)2•11(H2O)
Help on Composition: Composition: Molecular Weight = 940.48 gm
   Calcium    17.05 %  Ca   23.85 % CaO
   Magnesium   2.58 %  Mg    4.29 % MgO
   Arsenic    31.87 %  As   48.88 % As2O5
   Hydrogen    2.57 %  H    22.99 % H2O
   Oxygen     45.93 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca4Mg(AsO3OH)2(AsO4)2•11(H2O)
Help on Environment: Environment: Secondary mineral formed in the oxidation zone of arsenic ore deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1819
Help on Locality: Locality: Riechelsdorf, Hessen, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its magnesia content and the similarity to pharmacolite.
Help on Name Pronunciation: Name Pronunciation: Picropharmacolite + Pronunciation Say PICROPHARMACOLITE
Help on Synonym: Synonym: ICSD 100730
  PDF 14-222
 

Picropharmacolite Image

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Picropharmacolite

Comments: White, acicular crystalline sprays of picropharmacolite on matrix.
Location: Wechsel Schacht, Richelsdorf, Hesse, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Picropharmacolite

Comments: Snow white acicular, radial spray of picropharmacolite with pink sainfeldite.
Location: Wilhelm Mine, Richelsdorf District, Hesse, Germany. Scale: Cluster size 6 mm.
© Tom Loomis / Dakota Matrix

Picropharmacolite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0034:1:0.497
Help on Cell Dimensions: Cell Dimensions: a = 13.547, b = 13.5, c = 6.71, Z = 2; alpha = 99.85°, beta = 96.41°, gamma = 91.6° V = 1,201.04 Den(Calc)= 2.60
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 13.5(1), 3.18(0.8), 9.2(0.6),
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Catti M , Ferraris G , Ivaldi G , American Mineralogist , 66 (1981) p.385-391, The crystal structure of picropharmacolite, Ca4Mg(HAsO4)2(AsO4)2*11H2O

 

Physical Properties of Picropharmacolite

Help on Cleavage: Cleavage: {100} Perfect, {010} Perfect
Help on Color: Color: Colorless, Silky white.
Help on Density: Density: 2.58
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luminescence: Luminescence: Fluorescent, Short UV=blue-white, violet-white white, Long UV=Blue-white, violet-white white.
Help on Luster: Luster: Pearly
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Picropharmacolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.138 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.13 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.244,KPDmeas= 0.2459,KC= 0.216
Ncalc = 1.56
Help on Optical Data: Optical Data: Biaxial (?), a=1.631, b=1.632, g=1.64, bire=0.0090, 2V(Calc)=40, 2V(Meas)=40. Dispersion r < v strong.
 

Calculated Properties of Picropharmacolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.57 gm/cc
note: Specific Gravity of Picropharmacolite =2.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0030387768
Boson Index = 0.9969612232
Help on Photoelectric: Photoelectric: PEPicropharmacolite = 23.17 barns/electron
U=PEPicropharmacolite x rElectron Density= 59.43 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Picropharmacolite is Not Radioactive
 

Picropharmacolite Classification
Help on Dana Class: Dana Class: 39.02.04.01 (39)Hydrated Acid Phosphates, etc
  (39.02)H2 (AB)5 (XO4)4 · x(H2O)
  (39.02.04)Dana Group
 
39.02.04.01 Picropharmacolite Ca4Mg(AsO3OH)2(AsO4)2•11(H2O) P1 1
Help on Strunz Class: Strunz Class: 08.CH.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CH -With large and medium-sized cations, RO4:H2O < 1:1
 
08.CH.15 Picropharmacolite Ca4Mg(AsO3OH)2(AsO4)2•11(H2O) P1 1
 

Other Picropharmacolite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Picropharmacolite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Picropharmacolite

Ca4Mg(AsO3OH)2(AsO4)2•11(H2O)
Dana No: 39.02.04.01 Strunz No: 08.CH.15
Locality:

 

Notes: