Mineralogy Database

Roggianite Mineral Data

Search Webmineral :

General Roggianite Information

Help on Chemical  Formula: Chemical Formula: Ca2[Be(OH)2Al2Si4O13]•<2•5(H2O)
Help on Composition: Composition: Molecular Weight = 540.72 gm
   Calcium    14.82 %  Ca   20.74 % CaO
   Beryllium   1.67 %  Be    4.63 % BeO
   Aluminum    9.98 %  Al   18.86 % Al2O3
   Silicon    20.78 %  Si   44.45 % SiO2
   Hydrogen    1.27 %  H    11.33 % H2O
   Oxygen     51.49 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Be(OH)2Al2(Si4O13)•2.4(H2O)
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Type locality: in albitite dike at Alpe Rosso in Val Vigezzo about 1.5 km south of Orcesco, Novara Province, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Aldo G. Roggiani, a teacher of natural sciences, who first found the mineral.
Help on Name Pronunciation: Name Pronunciation: Roggianite + Pronunciation Say ROGGIANITE
Help on Synonym: Synonym: Ginzburgite
  ICSD 71349
  PDF 39-366

Roggianite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: Glassy white fibrous roggianite aggregate.
Location: Murzinka, Sverdlovsk District, Middle Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Roggianite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.49989
Help on Cell Dimensions: Cell Dimensions: a = 18.332, c = 9.164, Z = 8; V = 3,079.67 Den(Calc)= 2.33
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 4/mcm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 13.08(1), 6.13(0.8), 9.27(0.8),

Physical Properties of Roggianite

Help on Cleavage: Cleavage: {110} Perfect
Help on Color: Color: Yellow, Yellowish white, White.
Help on Density: Density: 2.02
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Roggianite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.17 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2279,KPDmeas= 0.2629,KC= 0.2247
Ncalc = 1.45 - 1.52
Help on Optical Data: Optical Data: Uniaxial (+), w=1.527, e=1.535, bire=0.0080.

Calculated Properties of Roggianite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.34 gm/cc
note: Specific Gravity of Roggianite =2.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PERoggianite = 2.94 barns/electron
U=PERoggianite x rElectron Density= 6.88 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Roggianite is Not Radioactive

Roggianite Classification

Help on  Dana Class: Dana Class: (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.07)Brewsterite and related species Brewsterite-Sr (Sr,Ba)Al4Si12O32•10(H2O) P 21/m 2/m Brewsterite-Ba! (Ba,Sr)Al2Si6O16•5(H2O) P 21/m,P 21 Mono Yugawaralite CaAl2Si6O16•4(H2O) Pc m Goosecreekite CaAl2Si6O16•5(H2O) P 21 2 Roggianite Ca2[Be(OH)2Al2Si4O13]•<2•5(H2O) I 4/mcm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.GB.20 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GB -Chains of single connected 4-membered rings
09.GB.20 Roggianite Ca2[Be(OH)2Al2Si4O13]•<2•5(H2O) I 4/mcm 4/m 2/m 2/m

Other Roggianite Information

Help on References: References: NAME( CanMin, v 35, p 1589) 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 Roggianite :
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

Search for Roggianite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Roggianite :

Ask about Roggianite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

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


Dana No: Strunz No: 09.GB.20





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.