Guimaraesite Mineral Data

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



[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery]
John Betts - Fine Minerals
Classic minerals, out-of-print books & magazines, plus informative articles for collectors


General Guimaraesite Information

Help on Chemical Formula: Chemical Formula: Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O
Help on Composition: Composition: Molecular Weight = 1,107.66 gm
   Calcium      7.24 %  Ca   10.13 % CaO
   Magnesium    3.84 %  Mg    6.37 % MgO
   Beryllium    3.25 %  Be    9.03 % BeO
   Zinc        13.28 %  Zn   16.53 % ZnO
   Iron         5.04 %  Fe    6.49 % FeO
   Phosphorus  16.78 %  P    38.44 % P2O5
   Hydrogen     1.46 %  H    13.01 % H2O
   Oxygen      49.11 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Zn2.25Mg1.75Fe2+Be4(PO4)6(OH)4•6(H2O)
Help on Environment: Environment: Roscherite group. Zinc analog of zanazziite.
Help on IMA Status: IMA Status: Proposed IMA 2006
Help on Locality: Locality: Granite pegmatite near the Piauí river, Itinga county, Minas Gerais, Brazil Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Help on Synonym: Synonym: IMA2006-028
 

Guimaraesite Image

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

Guimaraesite

Comments: Brown guimaraesite spheres and crystal aggregates..
Location: Piaui district, Itinga, Minas Gerais, Brazil. Scale: Specimen size 2 mm.
© Diederik Visser
Click Here for Larger Guimaraesite Image in a New Browser Window Images:
Click Here for Larger Guimaraesite Image

Guimaraesite

Comments: Botryoidal guimaraesite on eosphorite.
Location: Piaul District, Itinga, Minas Gerais, Brazil. Scale: Specimen size 1.1 x 0.9 x 0.8 cm.
© Rob Lavinsky

Guimaraesite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.3496:1:0.5599
Help on Cell Dimensions: Cell Dimensions: a = 15.98, b = 11.84, c = 6.63, Z = 2; beta = 95.15° V = 1,249.35 Den(Calc)= 2.94
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.98(1), 3.152(0.9), 9.48(0.9),4.82(0.8), 2.708(0.8), 2.961(0.7), 3.052(0.7), 2.841(0.7),
 

Physical Properties of Guimaraesite

Help on Color: Color: Brown.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Guimaraesite

Help on Optical Data: Optical Data: NCalc= 1.61 - from Gladstone-Dale relationship (KC = 0.2086) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Guimaraesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.91 gm/cc
note: Specific Gravity of Guimaraesite =2.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEGuimaraesite = 9.74 barns/electron
U=PEGuimaraesite x rElectron Density= 28.37 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Guimaraesite is Not Radioactive
 

Guimaraesite Classification
Help on Dana Class: Dana Class: 42.07.07.06 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq · x(H2O)
  (42.07.07)Roscherite group
 
42.07.07.01 Roscherite Ca(Mn,Fe)5Be4(PO4)6(OH)4•6(H2O) C1 1
 
42.07.07.03 Zanazziite Ca2(Mg,Fe)(Mg,Fe,Al,Mn,Fe)4Be4(PO4)6(OH)4•6(H2O) C 2/c 2/m
 
42.07.07.04 Greifensteinite! Ca2Be4(Fe,Mn)5(PO4)6(OH)4•6(H2O) C 2/c 2/m
 
42.07.07.05 Atencioite! Ca2Fe[]Mg2Fe2Be4(PO4)6(OH)4•6H2O P1 1
 
42.07.07.06 Guimaraesite Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O C 2/c 2/m
 
42.07.07.07 Footemineite! Ca2MnMn2Mn2Be4(PO4)6(OH)4•6H2O P1 1
 
42.07.07.08 Ruifrancoite! Ca2([],Mn)2(Fe,Mn,Mg)4Be4(PO4)6(OH)4•6H2O C 2/c 2/m
Help on Strunz Class: Strunz Class: 08.DA.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DA -With small (and occasionally larger) cations
 
08.DA.10 Roscherite Ca(Mn,Fe)5Be4(PO4)6(OH)4•6(H2O) C1 1
 
08.DA.10 Zanazziite Ca2(Mg,Fe)(Mg,Fe,Al,Mn,Fe)4Be4(PO4)6(OH)4•6(H2O) C 2/c 2/m
 
08.DA.10 Footemineite! Ca2MnMn2Mn2Be4(PO4)6(OH)4•6H2O P1 1
 
08.DA.10 Atencioite! Ca2Fe[]Mg2Fe2Be4(PO4)6(OH)4•6H2O P1 1
 
08.DA.10 Greifensteinite! Ca2Be4(Fe,Mn)5(PO4)6(OH)4•6(H2O) C 2/c 2/m
 
08.DA.10 Ruifrancoite! Ca2([],Mn)2(Fe,Mn,Mg)4Be4(PO4)6(OH)4•6H2O C 2/c 2/m
 
08.DA.10 Guimaraesite Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O C 2/c 2/m
 

Other Guimaraesite Information
Help on See Also: See Also: Links to other databases for Guimaraesite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Guimaraesite using:

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

Visit our Advertisers for Guimaraesite :

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 Guimaraesite Mineral Data :

Ask about Guimaraesite 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 Guimaraesite Specimen Label here :

Guimaraesite

Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O
Dana No: 42.07.07.06 Strunz No: 08.DA.10
Locality:

 

Notes: