Buchwaldite Mineral Data

Buchwaldite Mineral Data
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General Buchwaldite Information

Help on Chemical Formula: Chemical Formula: NaCaPO4
Help on Composition: Composition: Molecular Weight = 158.04 gm
   Sodium      14.55 %  Na   19.61 % Na2O
   Calcium     25.36 %  Ca   35.48 % CaO
   Phosphorus  19.60 %  P    44.91 % P2O5
   Oxygen      40.49 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCa(PO4)
Help on Environment: Environment: As inclusions in troilite nodules in an iron meteorite.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: In the Agpalilik and other fragments of the Cape York iron meteorite. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: To honor Dr. Vagn Fabius Buchwald (1929- ), Technical University of Denmark, Lyngby, Denmark, for his contributions to the study of iron meteorites.
Help on Name Pronunciation: Name Pronunciation: Buchwaldite + Pronunciation Say BUCHWALDITE
Help on Synonym: Synonym: ICSD 35629 ?
  PDF 29-1194
 

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Buchwaldite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.558:1:0.7276
Help on Cell Dimensions: Cell Dimensions: a = 5.167, b = 9.259, c = 6.737, Z = 4; V = 322.31 Den(Calc)= 3.26
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P mn21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.72(1), 3.79(0.9), 1.91(0.8),
Click Here for Large Buchwaldite Structure Window Crystal Structure:

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Ben Amara M , Vlasse M , Le Flem G , Hagenmuller P , Acta Crystallographica, Section C , 39 (1983) p.1483-1485, Structure of the low-temperature variety of calcium sodium orthophosphate, NaCaPO4, Locality: synthetic

 

Physical Properties of Buchwaldite

Help on Color: Color: White.
Help on Density: Density: 3.21
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Streak: Streak: white
 

Optical Properties of Buchwaldite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.019 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1874,KPDmeas= 0.1903,KC= 0.194
Ncalc = 1.62 - 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.607, b=1.61, g=1.616, bire=0.0090, 2V(Calc)=72, 2V(Meas)=65.
 

Calculated Properties of Buchwaldite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.17 gm/cc
note: Specific Gravity of Buchwaldite =3.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0005367288
Boson Index = 0.9994632712
Help on Photoelectric: Photoelectric: PEBuchwaldite = 4.30 barns/electron
U=PEBuchwaldite x rElectron Density= 13.62 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Buchwaldite is Not Radioactive
 

Buchwaldite Classification
Help on Dana Class: Dana Class: 38.01.02.02 (38)Anhydrous Phosphates, etc
  (38.01)A+ B++ XO4
  (38.01.02)Dana Group
 
38.01.02.01 Maricite NaFePO4 Pmnb 2/m 2/m 2/m
 
38.01.02.02 Buchwaldite NaCaPO4 P mn21 mm2
Help on Strunz Class: Strunz Class: 08.AD.25 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AD -With only large cations
 
08.AD.25 Buchwaldite NaCaPO4 P mn21 mm2
 

Other Buchwaldite 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 Buchwaldite :
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

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

Buchwaldite

NaCaPO4
Dana No: 38.01.02.02 Strunz No: 08.AD.25
Locality:

 

Notes: