Fluckite Mineral Data

Fluckite Mineral Data
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General Fluckite Information

Help on Chemical Formula: Chemical Formula: CaMn(HAsO4)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 410.90 gm
   Calcium     9.75 %  Ca   13.65 % CaO
   Manganese  13.37 %  Mn   17.26 % MnO
   Arsenic    36.47 %  As   55.94 % As2O5
   Hydrogen    1.47 %  H    13.15 % H2O
   Oxygen     38.94 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMn2+H2(AsO4)2•2(H2O)
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Gabe Gottes St. Jacques vein at Ste.-Marie-aux-Mines, Vosges Mts., Alsace, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Pierre Fluck, Mineralogist at Louis Pasteur University, Strasbourg, France.
Help on Name Pronunciation: Name Pronunciation: Fluckite Say FLUCKITE
Help on Synonym: Synonym: ICSD 200702
  PDF -195
 

Fluckite Image

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Fluckite

Comments: White to pale pink crystalline translucent botryoids of fluckite.
Location: Giftgrube, Sainte-Marie-aux-Mines, Alsace, Haute-Rhin, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fluckite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.1111:1:0.9152
Help on Cell Dimensions: Cell Dimensions: a = 8.459, b = 7.613, c = 6.968, Z = 2; alpha = 82.21°, beta = 98.25°, gamma = 95.86° V = 437.69 Den(Calc)= 3.12
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): 7.512(1), 3.266(0.91), 3.528(0.9),
Click Here for Large Fluckite Structure Window Crystal Structure:

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Catti M , Chiari G , Ferraris G , Bulletin de Mineralogie , 103 (1980) p.129-134, Fluckite, CaMn(HAsO4)2*2H2O, a structure related, by pseudo-polytypism to krautite MnHAsO4*H2O, Locality: Sainte Marie-aux-Mines, Alsace, France

 

Physical Properties of Fluckite

Help on Cleavage: Cleavage: {010} Perfect, {100} Good, {101} Indistinct
Help on Color: Color: Colorless, Light pink, Dark pink.
Help on Density: Density: 3.05
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Streak: Streak: white
 

Optical Properties of Fluckite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2026,KPDmeas= 0.2066,KC= 0.198
Ncalc = 1.6 - 1.62
Help on Optical Data: Optical Data: Biaxial (?), a=1.618, g=1.642, bire=0.0240, 2V(Meas)=large.
 

Calculated Properties of Fluckite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Fluckite =3.11 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003207819
Boson Index = 0.9996792181
Help on Photoelectric: Photoelectric: PEFluckite = 29.35 barns/electron
U=PEFluckite x rElectron Density= 87.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fluckite is Not Radioactive
 

Fluckite Classification
Help on Dana Class: Dana Class: 39.01.02.01 (39)Hydrated Acid Phosphates, etc
  (39.01)A+ [HXO4] · x(H2O)
  (39.01.02)Dana Group
 
39.01.02.01 Fluckite CaMn(HAsO4)2•2(H2O) P1 1
Help on Strunz Class: Strunz Class: 08.CB.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CB -With only medium-sized cations, RO4:H2O = 1:1
 
08.CB.15 Fluckite CaMn(HAsO4)2•2(H2O) P1 1
 
08.CB.15 Krautite MnAsO3(OH)2•(H2O) P 21 2
 

Other Fluckite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Fluckite :
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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Ask about Fluckite 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 Espaņol

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

Fluckite

CaMn(HAsO4)2•2(H2O)
Dana No: 39.01.02.01 Strunz No: 08.CB.15
Locality:

 

Notes: