Roselite-beta Mineral Data (original) (raw)

General Roselite-beta 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 Environment: Environment:

Secondary arsenate mineral.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1955

Help on Locality: Locality:

Schneeberg, Saxony, Germany. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for its dimorphic relationship with roselite.

Help on Name Pronunciation: Name Pronunciation:

Roselite-beta Say ROSELITE-BETA

Help on Synonym: Synonym:

Beta-roselite

Roselite-beta Image

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

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

Click Here for Larger Roselite-beta Image Roselite-beta Comments: Deep red, well crystallized roselite-beta covering a small pocket in white calcite. Location: Ahrbar, Bou-Azzer area.Scale: 7 x 4 x 4.5 cm. © Fabre Minerals

Roselite-beta Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.7659:1:0.723

Help on Cell Dimensions: Cell Dimensions:

a = 5.89, b = 7.69, c = 5.56, Z = 1; alpha = 112.6°, beta = 70.8°, gamma = 119.4° V = 191.29 Den(Calc)= 3.86

Help on Crystal System: Crystal System:

TriclinicSpace Group: P 1 or P1

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.78(1), 1.714(0.8), 3.2(0.8),3.07(0.8), 3.56(0.6), 2.16(0.4), 3.33(0.4), 5.07(0.3),

Physical Properties of Roselite-beta

Help on Cleavage: Cleavage:

{010} Perfect

Help on Color: Color:

Dark rose red.

Help on Density: Density:

3.71

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Habit: Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Help on Hardness: Hardness:

3.5-4 - Copper Penny-Fluorite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

pale red

Optical Properties of Roselite-beta

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.039 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1996,KPDmeas= 0.1991,KC= 0.1916
Ncalc = 1.71

Help on Optical Data: Optical Data:

Biaxial (-), a=1.723, b=1.737, g=1.756, bire=0.0330

Calculated Properties of Roselite-beta

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.56 gm/cc
note: Specific Gravity of Roselite-beta =3.71 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0017853601
Boson Index = 0.9982146399

Help on Photoelectric: Photoelectric:

PERoselite-beta = 28.49 barns/electron
U=PERoselite-beta x rElectron Density= 101.47 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Roselite-beta is Not Radioactive

Roselite-beta Classification

Help on Dana Class: Dana Class:

40.02.02.07 (40)Hydrated Phosphates, etc

(40.02)where A++ (B++)2 (XO4) � x(H2O)

(40.02.02)Fairfieldite Subgroup (Triclinic: P-1�)

40.02.02.01 Fairfieldite Ca2(Mn,Fe)(PO4)2•2(H2O) P1 1

40.02.02.02 Messelite Ca2(Fe,Mn)(PO4)2•2(H2O) P1 1

40.02.02.03 Collinsite Ca2(Mg,Fe)(PO4)2•2(H2O) P1 1

40.02.02.04 Cassidyite Ca2(Ni,Mg)(PO4)2•2(H2O) P1 1

40.02.02.05 Talmessite Ca2Mg(AsO4)2•2(H2O) P1 1

40.02.02.06 Gaitite Ca2Zn(AsO4)2•2(H2O) P1 1

40.02.02.07 Roselite-beta Ca2(Co,Mg)(AsO4)2•2(H2O) P 1 or P1 Tri

40.02.02.08 Parabrandtite Ca2Mn(AsO4)•2(H2O) P1,P 1 Tri

40.02.02.09 Hillite! Ca2(Zn,Mg)[PO4]2•2(H2O) P1 1

40.02.02.10 Nickeltalmessite! Ca2Ni(AsO4)2•2H2O P 1

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-beta 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-beta :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Ask about Roselite-beta here :
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Print or Cut-and-Paste your Roselite-beta Specimen Label here :

Roselite-beta

Ca2(Co,Mg)(AsO4)2•2(H2O)
Dana No: 40.02.02.07 Strunz No: 08.CG.10
Locality:

Notes: