Mineralogy Database

Grossite Mineral Data

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General Grossite Information

Help on Chemical  Formula: Chemical Formula: CaAl4O7
Help on Composition: Composition: Molecular Weight = 260.00 gm
   Calcium   15.41 %  Ca   21.57 % CaO
   Aluminum  41.51 %  Al   78.43 % Al2O3
   Oxygen    43.08 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl4O7
Help on Environment: Environment: Argillaceous limestones metamorphosed at high temperature and low pressure.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: Hatrurim Fm, Israel. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Shulamit Gross (1923- ), Geological Survey of Israel, Jerusalem, Israel, who noted the species in the Hatrurim Formation, Israel.
Help on Name Pronunciation: Name Pronunciation: Grossite Say GROSSITE
Help on Synonym: Synonym: ICSD 27264
  PDF 46-1475

Grossite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4523:1:0.6112
Help on Cell Dimensions: Cell Dimensions: a = 12.94, b = 8.91, c = 5.446, Z = 4; beta = 107.01° V = 600.43 Den(Calc)= 2.88
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.515(1), 4.46(0.43), 2.605(0.36),

Physical Properties of Grossite

Help on Color: Color: Colorless, White.
Help on Density: Density: 2.88
Help on Diaphaneity: Diaphaneity: Transparent
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Grossite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2185,KPDmeas= 0.2185,KC= 0.2076
Ncalc = 1.6
Help on Optical Data: Optical Data: Biaxial (+), a=1.6178, b=1.6184, g=1.6516, bire=0.0338, 2V(Calc)=16, 2V(Meas)=15.5.

Calculated Properties of Grossite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.84 gm/cc
note: Specific Gravity of Grossite =2.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0004148588
Boson Index = 0.9995851412
Help on Photoelectric: Photoelectric: PEGrossite = 3.12 barns/electron
U=PEGrossite x rElectron Density= 8.85 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Grossite is Not Radioactive

Grossite Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.03)with 2+ and higher charged cations
  (07.03.02)Dana Group Grossite CaAl4O7 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 04.CC.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.C - Metal:Oxygen = 2:3, 3:5, and Similar
  04.CC -With large and medium-sized cations
04.CC.15 Grossite CaAl4O7 C 2/c 2/m

Other Grossite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,1990)
Help on See Also: See Also: Links to other databases for Grossite :
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: 04.CC.15





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