Mineralogy Database

Yugawaralite Mineral Data

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General Yugawaralite Information

Help on Chemical  Formula: Chemical Formula: CaAl2Si6O16•4(H2O)
Help on Composition: Composition: Molecular Weight = 590.61 gm
   Calcium    6.79 %  Ca    9.49 % CaO
   Aluminum   9.14 %  Al   17.26 % Al2O3
   Silicon   28.53 %  Si   61.04 % SiO2
   Hydrogen   1.37 %  H    12.20 % H2O
   Oxygen    54.18 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl2Si6O16•4(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1952
Help on Locality: Locality: Yugawara Hot Springs, Kanagawa Prefecture, Honshu, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Yugawaralite + Pronunciation Say YUGAWARALITE
Help on Synonym: Synonym: ICSD 29505
  PDF 39-1372

Yugawaralite Image

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Comments: Pearly translucent colorless yugawaralite microcrystals.
Location: Klif Hvalfjordur, Iceland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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Comments: Yugawaralite, in well developed vitreous crystals up to 1 cm. in a large vug on matix.
Location: Khandivaly Quarry, Maharastra, India. Scale: Picture size 2 cm.
© Sandro Maggia/Minernet.it

Yugawaralite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4804:1:0.7187
Help on Cell Dimensions: Cell Dimensions: a = 6.728, b = 14.004, c = 10.066, Z = 2; beta = 111.13° V = 884.64 Den(Calc)= 2.22
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Pc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.056(1), 5.82(0.9), 4.68(0.85),

Physical Properties of Yugawaralite

Help on Cleavage: Cleavage: {010} Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.23
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Yugawaralite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2246,KPDmeas= 0.2236,KC= 0.2241
Ncalc = 1.5
Help on Optical Data: Optical Data: Biaxial (+), a=1.495, b=1.497, g=1.504, bire=0.0090, 2V(Calc)=58, 2V(Meas)=78.

Calculated Properties of Yugawaralite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.24 gm/cc
note: Specific Gravity of Yugawaralite =2.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEYugawaralite = 2.21 barns/electron
U=PEYugawaralite x rElectron Density= 4.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yugawaralite is Not Radioactive

Yugawaralite 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.15 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GB -Chains of single connected 4-membered rings
09.GB.15 Yugawaralite CaAl2Si6O16•4(H2O) Pc m

Other Yugawaralite Information

Help on References: References: NAME( CanMin, v 35, p 1591) 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 Yugawaralite :
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
16 - Zeolite Database by Bruno Herreros

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Dana No: Strunz No: 09.GB.15





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