Yugawaralite Mineral Data

Yugawaralite Mineral Data +

[Mineral Specimens] [Our best] [Rare specimens] [Latest updates] [Home Page]
Fine Minerals, Moldavites, Jewellery, Meteorites and Fossils
Rockshop.cz is based in Prague, Czech republic

General Yugawaralite Information

Chemical Formula:

CaAl2Si6O16·4(H2O)

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

Empirical Formula:

CaAl₂Si₆O₁₆·4(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1952

Locality:

Yugawara Hot Springs, Kanagawa Prefecture, Honshu, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 29505

PDF 39-1372

Yugawaralite Image

Images:

Yugawaralite

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

Images:

Yugawaralite

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.
© Minernet

Yugawaralite Crystallography

Axial Ratios:

a:b:c =0.4804:1:0.7187

Cell Dimensions:

a = 6.728, b = 14.004, c = 10.066, Z = 2; beta = 111.13° V = 884.64 Den(Calc)= 2.22

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Pc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.056(1), 5.82(0.9), 4.68(0.85),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Artioli G , Stahl K , Cruciani G , Gualtieri A , Hanson J C , American Mineralogist , 86 (2001) p.185-192, In situ dehydration of yugawaralite, Sample: at T = 315 K

View Additional jPOWD Structure files for Yugawaralite
[1] [2]

Physical Properties of Yugawaralite

Cleavage:

[010] Indistinct

Color:

Colorless, White.

Density:

2.23

Diaphaniety:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Yugawaralite

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

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

Electron Density:

r_electron=2.24 gm/cc
note: r_Yugawaralite=2.22 gm/cc.

Fermion Index

Fermion Index = 0.01367
Boson Index = 0.98633

Photoelectric:

PE_Yugawaralite= 2.21 barns/electron
U=PE_Yugawaralite x r_electron= 4.96 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Yugawaralite is Not Radioactive

Yugawaralite Classification

Dana Class:

77.1.7.2 (77)Tectosilicate Zeolite group

(77.1)true zeolites

(77.1.7)Brewsterite and related species

77.1.7.1 Brewsterite-Sr (Sr,Ba)Al4Si12O32·10(H2O) P 2₁/m 2/m

77.1.7.1a Brewsterite-Ba! (Ba,Sr)Al2Si6O16·5(H2O) P 2₁/m,P 2₁ Mono

77.1.7.2 Yugawaralite CaAl2Si6O16·4(H2O) Pc m

77.1.7.3 Goosecreekite CaAl2Si6O16·5(H2O) P 2₁ 2

77.1.7.4 Roggianite Ca2[Be(OH)2Al2Si4O13]·<2·5(H2O) I 4/mcm 4/m 2/m 2/m

Strunz Class:

VIII/J.25-90 VIII - Silicates

VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites

VIII/J.25 - Zeolite group, Amicite - Phillipsite - Yugawaralite series

VIII/J.25-10 Amicite K2Na2Al4Si4O16·5(H2O) I2 2

VIII/J.25-20 Gismondine Ca2Al4Si4O16·9(H2O) P 2₁/c 2/m

VIII/J.25-30 Gobbinsite (Na2,Ca)2K2Al6Si10O32·12(H2O) P mn2₁ mm2

VIII/J.25-40 Garronite Na2Ca5Al12Si20O64·27(H2O) I 4₁/a 4/m

VIII/J.25-50 Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-55 Phillipsite-K! (K,Na,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-60 Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-70 Harmotome (Ba,Na,K)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-75 Montesommaite (K,Na)9Al9Si23O64·10(H2O) F dd2 mm2

VIII/J.25-80 Merlinoite (K,Ca,Na,Ba)7Si23Al9O64·23(H2O) I mmm 2/m 2/m 2/m

VIII/J.25-90 Yugawaralite CaAl2Si6O16·4(H2O) Pc m

Other Yugawaralite Information

References:

NAME( CanMin, v 35, p 1591) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Yugawaralite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Yugawaralite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Yugawaralite Mineral Data :

Ask about Yugawaralite 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 Español

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

Yugawaralite

CaAl2Si6O16·4(H2O)
Dana No: 77.1.7.2 Strunz No: VIII/J.25-90
Locality:

Notes: