Gyrolite Mineral Data

Gyrolite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


B and L Minerals
[New Items] [Specials] [Login] [Register] [Auction Items]
B & L Minerals, Fine Mineral specimens for sale for collectors of all levels


General Gyrolite Information

Help on Chemical Formula: Chemical Formula: NaCa16Si23AlO60(OH)8•64(H2O)
Help on Composition: Composition: Molecular Weight = 3,586.19 gm
   Sodium     0.64 %  Na    0.86 % Na2O
   Calcium   17.88 %  Ca   25.02 % CaO
   Aluminum   0.75 %  Al    1.42 % Al2O3
   Silicon   18.01 %  Si   38.54 % SiO2
   Hydrogen   3.82 %  H    34.16 % H2O
   Oxygen    58.89 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCa16Si23AlO60(OH)8•64(H2O)
Help on Environment: Environment: Secondary mineral from the alteration of basalts. Pegmatite dike intruding limestone.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1851
Help on Locality: Locality: Isle of Skye, Scotland, UK. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek guros = "circle", in allusion to the round form of the crystalline groupings.
Help on Name Pronunciation: Name Pronunciation: Gyrolite Say GYROLITE
Help on Synonym: Synonym: Centrallasite
  ICSD 68199
  PDF 42-1452
 

Gyrolite Image

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

Gyrolite

Comments: Two round beige gyrolite aggregates each about 5cm diameter.
Location: Bombay, India. Scale: Specimen size 10cm.
© John Attard

Gyrolite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:13.66255
Help on Cell Dimensions: Cell Dimensions: a = 9.72, c = 132.8, Z = 5; V = 10,865.79 Den(Calc)= 2.74
Help on Crystal System: Crystal System: Hexagonal - PyramidalH-M Symbol (6) Space Group: P 61
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.12(1), 22(1), 11(0.8),
Click Here for Large Gyrolite Structure Window 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


Merlino S , Mineralogical Magazine , 52 (1988) p.377-387, Gyrolite: its crystal structure and crystal chemistry, Locality: Qarusait, Greenland, Note: x-coordinate of O102 adjusted to match reported bond lengths, Note: occupancies invented to match formula, Locality: Qarusait, Greenland

 

Physical Properties of Gyrolite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Brown, Colorless, Yellow, White, Light green.
Help on Density: Density: 2.45 - 2.51, Average = 2.48
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Compact - Occurs as a compact mass.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Short UV=white, Long UV=white.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Gyrolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.134 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.217 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1985,KPDmeas= 0.2194,KC= 0.2534
Ncalc = 1.62 - 1.69
Help on Optical Data: Optical Data: Biaxial (-), a=1.535, b=1.548, g=1.549, bire=0.0140
 

Calculated Properties of Gyrolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.57 gm/cc
note: Specific Gravity of Gyrolite =2.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0089417003
Boson Index = 0.9910582997
Help on Photoelectric: Photoelectric: PEGyrolite = 2.94 barns/electron
U=PEGyrolite x rElectron Density= 7.55 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gyrolite is Not Radioactive
 

Gyrolite Classification
Help on Dana Class: Dana Class: 73.02.02c.01 (73)Phyllosilicate Condensed Tetrahedral Sheets
  (73.02)with double and single layers
  (73.02.02c)Reyerite group (Gyrolite Subgroup)
 
73.02.02c.01 Gyrolite NaCa16Si23AlO60(OH)8•64(H2O) P 61 6
Help on Strunz Class: Strunz Class: 09.EE.30 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EE -Single tetrahedral nets of 6-membered rings
 
09.EE.30 Gyrolite NaCa16Si23AlO60(OH)8•64(H2O) P 61 6
 
09.EE.30 Tungusite [Ca14(OH)8](Si8020)(Si8020)2[Fe9(OH)14] P1 1
 

Other Gyrolite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Gyrolite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

Search for Gyrolite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Gyrolite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Gyrolite Mineral Data :

Ask about Gyrolite 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 Gyrolite Specimen Label here :

Gyrolite

NaCa16Si23AlO60(OH)8•64(H2O)
Dana No: 73.02.02c.01 Strunz No: 09.EE.30
Locality:

 

Notes: