Merrillite Mineral Data

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


Dan Weinrich Auctions
[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Dan Weinrich Auctions
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!


Couldn't connect to server

General Merrillite Information

Help on Chemical Formula: Chemical Formula: Ca18Na2Mg2(PO4)14
Help on Composition: Composition: Molecular Weight = 2,145.59 gm
   Sodium       2.14 %  Na    2.89 % Na2O
   Calcium     33.62 %  Ca   47.04 % CaO
   Magnesium    2.27 %  Mg    3.76 % MgO
   Phosphorus  20.21 %  P    46.31 % P2O5
   Oxygen      41.76 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca18Na2Mg2(PO4)14
Help on Environment: Environment: Extraterrestrial bodies. The name merrillite was proposed in 1917.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Meteorites Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after George Perkins Merrill (1854-1929), meteorite specialist at U. S. National Museum, Smithsonian Institution, Washington, D.C. USA.
Help on Synonym: Synonym: Merrillite-Na
 

Merrillite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:3.58096
Help on Cell Dimensions: Cell Dimensions: a = 10.362, c = 37.106, Z = 3; V = 3,450.34 Den(Calc)= 3.10
Help on Crystal System: Crystal System: Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.85(1), 2.58(0.6), 3.19(0.6),3.43(0.6), 5.18(0.6), 1.71(0.5), 1.92(0.5), 1.54(0.4),
Click Here for Large Merrillite 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


Hughes J M , Jolliff B L , Rakovan J , American Mineralogist , 93 (2008) p.1300-1305, The crystal chemistry of whitlockite and merrillite and the, dehydrogenation of whitlockite to merrillite, Locality: synthetic, Note: Formed through dehydrogenation of synthetic whitlockite, by heating at 1050 degrees C for 24 hours

 

Physical Properties of Merrillite

Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
 

Optical Properties of Merrillite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2005,KC= 0.1965
Ncalc = 1.61
Help on Optical Data: Optical Data: Uniaxial (-), e=1.62, w=1.623, bire=0.0030.
 

Calculated Properties of Merrillite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.07 gm/cc
note: Specific Gravity of Merrillite =3.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0029199202
Boson Index = 0.9970800798
Help on Photoelectric: Photoelectric: PEMerrillite = 5.19 barns/electron
U=PEMerrillite x rElectron Density= 15.95 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Merrillite is Not Radioactive
 

Merrillite Classification
Help on Dana Class: Dana Class: 38.03.04.04 (38)Anhydrous Phosphates, etc
  (38.03)(A+ B++)3 (XO4)2
  (38.03.04)Whitlockite group
 
38.03.04.01 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m
 
38.03.04.02 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m
 
38.03.04.03 Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m
 
38.03.04.04 Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m
 
38.03.04.05 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m
 
38.03.04.06 Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m
 
38.03.04.07 Tuite! Ca3(PO4)2 R 3m 3m
 
38.03.04.08 Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m
Help on Strunz Class: Strunz Class: 08.AC.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
 
08.AC.45 Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m
 
08.AC.45 Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m
 
08.AC.45 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m
 
08.AC.45 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m
 
08.AC.45 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m
 
08.AC.45 Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m
 
08.AC.45 Tuite! Ca3(PO4)2 R 3m 3m
 
08.AC.45 Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m
 

Other Merrillite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Merrillite :
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 Merrillite using:

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

Visit our Advertisers for Merrillite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Diamond Dan Publications

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 Merrillite Mineral Data :

Ask about Merrillite 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 Merrillite Specimen Label here :

Merrillite

Ca18Na2Mg2(PO4)14
Dana No: 38.03.04.04 Strunz No: 08.AC.45
Locality:

 

Notes: