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Matulaite Mineral Data

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General Matulaite Information

Help on Chemical  Formula: Chemical Formula: CaAl18(PO4)12(OH)20•28(H2O)
Help on Composition: Composition: Molecular Weight = 2,509.98 gm
   Calcium      1.60 %  Ca    2.23 % CaO
   Aluminum    19.35 %  Al   36.56 % Al2O3
   Phosphorus  14.81 %  P    33.93 % P2O5
   Hydrogen     3.05 %  H    27.27 % H2O
   Oxygen      61.19 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl18(PO4)12(OH)20•28(H2O)
Help on Environment: Environment: An uncommon secondary mineral in the oxidized zone of phosphatic iron deposits.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Bachman iron mine, Hellertown, Northampton Co., and at General Trimble�s mine, Chester Co., Pennsylvania, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Margaret Mary Matula (1925- ), Allentown, Pennsylvania, USA, who supplied some of the first specimens.
Help on Name Pronunciation: Name Pronunciation: Matulaite + Pronunciation Say MATULAITE

Matulaite Image

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Comments: Opaque white pearly crystalline matulaite coating on quartz and brown limonite.
Location: Bachman Iron Mine, Hellertown, Northampton County, Pennsylvania, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Matulaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2215:1:0.6347
Help on Cell Dimensions: Cell Dimensions: a = 20.4, b = 16.7, c = 10.6, Z = 2; beta = 98.2° V = 3,574.29 Den(Calc)= 2.33
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.96(1), 4.42(0.4), 6.37(0.4),

Physical Properties of Matulaite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.33
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 1 - Talc
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Matulaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.057 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2485,KPDmeas= 0.2485,KC= 0.2352
Ncalc = 1.55
Help on Optical Data: Optical Data: Biaxial (-), b=1.576, g=1.582, , 2V(Meas)=60.

Calculated Properties of Matulaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.37 gm/cc
note: Specific Gravity of Matulaite =2.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003198628
Boson Index = 0.9996801372
Help on Photoelectric: Photoelectric: PEMatulaite = 1.53 barns/electron
U=PEMatulaite x rElectron Density= 3.63 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Matulaite is Not Radioactive

Matulaite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.13)Dana Type
  (42.13.03)Dana Group Matulaite CaAl18(PO4)12(OH)20•28(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.DK.30 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DK -With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
08.DK.30 Matulaite CaAl18(PO4)12(OH)20•28(H2O) P 21/c 2/m

Other Matulaite 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 Matulaite :
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: 08.DK.30





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