Sinhalite Mineral Data

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



[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974


General Sinhalite Information

Help on Chemical Formula: Chemical Formula: MgAlBO4
Help on Composition: Composition: Molecular Weight = 126.09 gm
   Magnesium  19.28 %  Mg   31.96 % MgO
   Aluminum   21.40 %  Al   40.43 % Al2O3
   Boron       8.57 %  B    27.61 % B2O3
   Oxygen     50.75 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgAl(BO4)
Help on Environment: Environment: Accessory mineral formed in boron-rich skarns at the contact of limestones with granite or gneiss.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1952
Help on Locality: Locality: Gem gravels in the Ratnapura district. Sri Lanka. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Sinhala, the Sanskrit name for Ceylon.
Help on Name Pronunciation: Name Pronunciation: Sinhalite + Pronunciation Say SINHALITE
Help on Synonym: Synonym: ICSD 75942
  PDF 25-1379
 

Sinhalite Image

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

Sinhalite

Comments: Crystalline sinhalite in white marble.
Location: Amity, near Warwick, Orange County, New York, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sinhalite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4385:1:0.5751
Help on Cell Dimensions: Cell Dimensions: a = 4.328, b = 9.868, c = 5.676, Z = 4; V = 242.41 Den(Calc)= 3.45
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.14(1), 1.62(0.9), 3.24(0.7),
Click Here for Large Sinhalite 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


Hayward C L , Angel R J , Ross N L , European Journal of Mineralogy , 6 (1994) p.313-321, The structural redetermination and crystal chemistry, of sinhalite, MgAlBO4

 

Physical Properties of Sinhalite

Help on Color: Color: Brown, Brown pink, Colorless, Yellow, Light pink.
Help on Density: Density: 3.47 - 3.5, Average = 3.48
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 6.5-7 - Pyrite-Quartz
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Sinhalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.039 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.201,KPDmeas= 0.199,KC= 0.207
Ncalc = 1.71 - 1.72
Help on Optical Data: Optical Data: Biaxial (-), a=1.667-1.676, b=1.697-1.704, g=1.705-1.712, bire=0.0360-0.0380, 2V(Calc)=52-54, 2V(Meas)=55.
Help on Pleochroism (x): Pleochroism (x): brown or pale yellow.
Help on Pleochroism (y): Pleochroism (y): green or pale brown.
Help on Pleochroism (z): Pleochroism (z): paler brown, pale greenish brown, or pale pinkish gray.
 

Calculated Properties of Sinhalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.39 gm/cc
note: Specific Gravity of Sinhalite =3.45 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PESinhalite = 1.14 barns/electron
U=PESinhalite x rElectron Density= 3.88 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sinhalite is Not Radioactive
 

Sinhalite Classification
Help on Dana Class: Dana Class: 24.01.01.01 (24)Borates - Anhydrous
  (24.01)where (A)2 XO4
  (24.01.01)Dana Group
 
24.01.01.01 Sinhalite MgAlBO4 Pbmm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 06.AC.05 06 - BORATES
  06.A - Monoborates
  06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
 
06.AC.05 Sinhalite MgAlBO4 Pbmm 2/m 2/m 2/m
 

Other Sinhalite Information
Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic5)
Help on See Also: See Also: Links to other databases for Sinhalite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Tradeshop.com - The Rainbow of Gems
17 - WWW-MINCRYST

Search for Sinhalite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Sinhalite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Sinhalite Mineral Data :

Ask about Sinhalite 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 Sinhalite Specimen Label here :

Sinhalite

MgAlBO4
Dana No: 24.01.01.01 Strunz No: 06.AC.05
Locality:

 

Notes: