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Nagelschmidtite Mineral Data

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General Nagelschmidtite Information

Help on Chemical  Formula: Chemical Formula: Ca7(SiO4)3(PO4)2
Help on Composition: Composition: Molecular Weight = 746.74 gm
   Calcium     37.57 %  Ca   52.57 % CaO
   Silicon     11.28 %  Si   24.14 % SiO2
   Phosphorus   8.30 %  P    19.01 % P2O5
   Oxygen      42.85 %  O
              ______        ______ 
              100.00 %       95.71 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca7(SiO4)3(PO4)2
Help on Environment: Environment: Sedimentary phosphate deposits.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Lowermost portion of the Hatrarum formation, Israel. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for G. Nagelschmidt, who first described the synthetic compound in 1937.
Help on Name Pronunciation: Name Pronunciation: Nagelschmidtite + Pronunciation Say NAGELSCHMIDTITE

Nagelschmidtite Image

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Comments: Upper - Transmitted light thin sections showing honey-brown nagelschmidtite. Lower - reflected light polished section showing nagelschmidtite (Nag), rankinite (Ran), Ti-rich androdite (Andr).
Location: Andradite-rich pegmatoid rock, Haturim Basin, Negev Desert, Israel. Scale: See Images.
© Diederik Visser

Nagelschmidtite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.3197
Help on Cell Dimensions: Cell Dimensions: a = 5.38, c = 7.1, Z = 0.5; V = 177.97 Den(Calc)= 3.48
Help on Crystal System: Crystal System: Hexagonal Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.66(1), 2.8(0.7), 1.94(0.4),

Physical Properties of Nagelschmidtite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Brown, Colorless, Yellowish white, Light yellow.
Help on Density: Density: 3.065
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Nagelschmidtite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.114 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1917,KPDmeas= 0.2176,KC= 0.1954
Ncalc = 1.6 - 1.68
Help on Optical Data: Optical Data: Biaxial (+/-), a=1.638-1.68, b=1.652-1.698,

Calculated Properties of Nagelschmidtite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.47 gm/cc
note: Specific Gravity of Nagelschmidtite =3.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0059821648
Boson Index = 0.9940178352
Help on Photoelectric: Photoelectric: PENagelschmidtite = 5.46 barns/electron
U=PENagelschmidtite x rElectron Density= 18.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nagelschmidtite is Not Radioactive

Nagelschmidtite Classification

Help on  Dana Class: Dana Class: (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
  (53.02)with (SO4), (CrO4), (PO4), etc.
  (53.02.02)Dana Group Nagelschmidtite Ca7(SiO4)3(PO4)2 Unk Hex
Help on  Strunz Class: Strunz Class: 09.HA.60 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HA -With alkali and alkali-earth Elements
09.HA.60 Nagelschmidtite Ca7(SiO4)3(PO4)2 Unk Hex

Other Nagelschmidtite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Nagelschmidtite :
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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Dana No: Strunz No: 09.HA.60





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