Thadeuite Mineral Data

Thadeuite Mineral Data
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General Thadeuite Information

Help on Chemical Formula: Chemical Formula: (Ca,Mn++)(Mg,Fe++,Mn+++)3(PO4)2(OH,F)2
Help on Composition: Composition: Molecular Weight = 368.49 gm
   Calcium     10.88 %  Ca   15.22 % CaO
   Magnesium   14.51 %  Mg   24.06 % MgO
   Manganese    4.47 %  Mn    6.43 % Mn2O3
   Iron         9.09 %  Fe   11.70 % FeO
   Phosphorus  16.81 %  P    38.52 % P2O5
   Hydrogen     0.41 %  H     3.67 % H2O
   Oxygen      41.25 %  O
   Fluorine     2.58 %  F     2.58 % F
                 -   %   F    -1.09 % -O=F2    
              ______        ______ 
              100.00 %      101.09 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMg2.2Fe2+0.6Mn3+0.3(PO4)2(OH)1.5F0.5
Help on Environment: Environment: Primary mineral in the margins of hydrothermal veins, formed between 230 to 360 deg. C and 100-1,000 bars.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Panasqueira Sn-W deposit, Portugal. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Namd for Decio Thadeu, Technical University, Lisbon, Portugal, for his studies on Portuguese ore deposits.
Help on Name Pronunciation: Name Pronunciation: Thadeuite + Pronunciation Say THADEUITE
Help on Synonym: Synonym: ICSD 17052
  PDF 33-284
 

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Thadeuite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4727:1:0.63
Help on Cell Dimensions: Cell Dimensions: a = 6.412, b = 13.563, c = 8.545, Z = 4; V = 743.12 Den(Calc)= 3.29
Help on Crystal System: Crystal System: Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: C 2221
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.38(1), 2.793(0.3), 3(0.3),
Click Here for Large Thadeuite Structure Window Crystal Structure:

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Isaacs A M , Peacor D R , American Mineralogist , 67 (1982) p.120-125, The crystal structure of thadeuite, Mg(Ca,Mn)(Mg,Fe,Mn)2(PO4)2(OH,F)2

 

Physical Properties of Thadeuite

Help on Cleavage: Cleavage: {010} Perfect, {???} Distinct
Help on Color: Color: Yellow orange.
Help on Density: Density: 3.25
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Cleaveable - Easily cleaved into fragments.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Thadeuite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.119 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.13 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1788,KPDmeas= 0.181,KC= 0.2056
Ncalc = 1.67 - 1.68
Help on Optical Data: Optical Data: Biaxial (-), a=1.568, b=1.597, g=1.6, bire=0.0320, 2V(Calc)=34, 2V(Meas)=33.
 

Calculated Properties of Thadeuite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.20 gm/cc
note: Specific Gravity of Thadeuite =3.25 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEThadeuite = 6.30 barns/electron
U=PEThadeuite x rElectron Density= 20.17 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thadeuite is Not Radioactive
 

Thadeuite Classification
Help on Dana Class: Dana Class: 41.05.16.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.16)Dana Group
 
41.05.16.01 Thadeuite (Ca,Mn)(Mg,Fe,Mn)3(PO4)2(OH,F)2 C 2221 2 2 2
Help on Strunz Class: Strunz Class: 08.BH.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
 
08.BH.05 Thadeuite (Ca,Mn)(Mg,Fe,Mn)3(PO4)2(OH,F)2 C 2221 2 2 2
 

Other Thadeuite Information
Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Thadeuite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Thadeuite

(Ca,Mn++)(Mg,Fe++,Mn+++)3(PO4)2(OH,F)2
Dana No: 41.05.16.01 Strunz No: 08.BH.05
Locality:

 

Notes: