Roselite  Mineral Data

Roselite Mineral Data

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

Advertisment

[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.


General Roselite Information

Help on Chemical  Formula: Chemical Formula: Ca2(Co,Mg)(AsO4)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 444.30 gm
   Calcium    18.04 %  Ca   25.24 % CaO
   Magnesium   1.37 %  Mg    2.27 % MgO
   Cobalt      9.95 %  Co   12.65 % CoO
   Arsenic    33.73 %  As   51.73 % As2O5
   Hydrogen    0.91 %  H     8.11 % H2O
   Oxygen     36.01 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Co0.75Mg0.25(AsO4)2•2(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1825
Help on Locality: Locality: Rappold mines, Schneeberg, Saxony, Germany. Rosas mine at Sulcis, Sardinia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Gustave Rose (1798-1873), professor on mineralogy at the University of Berlin, Germany.
Help on Name Pronunciation: Name Pronunciation: Roselite Say ROSELITE
Help on Synonym: Synonym: ICSD 200126
  PDF 29-315
 

Roselite Image

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

Roselite

Comments: Gemmy crystals of roselite.
Location: Bou Azzer, Anti-Atlas Mts., Morocco. Scale: Crystal size 3 mm.
© John Veevaert

Roselite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4466:1:0.4324
Help on Cell Dimensions: Cell Dimensions: a = 5.801, b = 12.989, c = 5.617, Z = 2; beta = 107.42° V = 403.83 Den(Calc)= 3.65
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.99(1), 3.22(0.8), 3.35(0.6),2.76(0.5), 3.4(0.3), 5.09(0.2), 6.44(0.2), 3.75(0.1),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 2 2) ( 4 1 0) ( 1 2 0) ( 0 1 0) ( 1 2 2) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Click Here for Large Roselite 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


Hawthorne F C , Ferguson R B , The Canadian Mineralogist , 15 (1977) p.36-42, The crystal structure of roselite

 

Physical Properties of Roselite

Help on Cleavage: Cleavage: {010} Perfect, {???} Good
Help on Color: Color: Dark rose red, Pink.
Help on Density: Density: 3.69
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Habit: Habit: Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light red
 

Optical Properties of Roselite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.043 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1998,KPDmeas= 0.1977,KC= 0.1916
Ncalc = 1.7 - 1.71
Help on Optical Data: Optical Data: Biaxial (-), a=1.725, b=1.728, g=1.735, bire=0.0100, 2V(Calc)=68, 2V(Meas)=small. Dispersion r > v weak.
Help on Pleochroism (x): Pleochroism (x): dark rose.
Help on Pleochroism (y): Pleochroism (y): pale rose.
Help on Pleochroism (z): Pleochroism (z): paler rose.
 

Calculated Properties of Roselite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.54 gm/cc
note: Specific Gravity of Roselite =3.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0017853601
Boson Index = 0.9982146399
Help on Photoelectric: Photoelectric: PERoselite = 28.49 barns/electron
U=PERoselite x rElectron Density= 100.93 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Roselite is Not Radioactive
 

Roselite Classification

Help on  Dana Class: Dana Class: 40.02.03.01 (40)Hydrated Phosphates, etc
  (40.02)where A++ (B++)2 (XO4) · x(H2O)
  (40.02.03)Roselite Subgroup (Monoclinic: P21/c)
 
40.02.03.01 Roselite Ca2(Co,Mg)(AsO4)2•2(H2O) P 21/c 2/m
 
40.02.03.02 Brandtite Ca2(Mn,Mg)(AsO4)2•2(H2O) P 21/c 2/m
 
40.02.03.03 Zincroselite Ca2Zn(AsO4)2•2(H2O) P 21/c 2/m
 
40.02.03.04 Wendwilsonite Ca2(Mg,Co)(AsO4)2•2(H2O) P 21/c 2/m
 
40.02.03.05 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.CG.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CG -With large and medium-sized cations, RO4:H2O = 1:1
 
08.CG.10 Brandtite Ca2(Mn,Mg)(AsO4)2•2(H2O) P 21/c 2/m
 
08.CG.10 Roselite Ca2(Co,Mg)(AsO4)2•2(H2O) P 21/c 2/m
 
08.CG.10 Roselite-beta Ca2(Co,Mg)(AsO4)2•2(H2O) P 1 or P1 Tri
 
08.CG.10 Zincroselite Ca2Zn(AsO4)2•2(H2O) P 21/c 2/m
 
08.CG.10 Wendwilsonite Ca2(Mg,Co)(AsO4)2•2(H2O) P 21/c 2/m
 

Other Roselite Information

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

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Roselite :

A Bijoux Google Search for Roselite
Adam's Minerals Google Search for Roselite
Cape Minerals Google Search for Roselite
Dakota Matrix Minerals Google Search for Roselite
Excalibur Mineral Corp. Google Search for Roselite
Exceptional Minerals Google Search for Roselite
John Betts Fine Minerals Search for Roselite
McDougall Minerals Google Search for Roselite
Mineral News Website Link
Rock and Mineral Shows Google Search for Roselite
Weinrich Minerals, Inc. Google Search for Roselite

Ask about Roselite 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 Roselite Specimen Label here :

Roselite

Ca2(Co,Mg)(AsO4)2•2(H2O)
Dana No: 40.02.03.01 Strunz No: 08.CG.10
Locality:

 

Notes: