Camgasite Mineral Data

General Camgasite Information

Chemical Formula:

CaMg(AsO4)(OH)•5(H2O)

Composition:

Molecular Weight = 310.39 gm

Calcium 12.91 % Ca 18.07 % CaO

Magnesium 7.83 % Mg 12.99 % MgO

Arsenic 24.14 % As 37.02 % As₂O₅

Hydrogen 3.57 % H 31.92 % H₂O

Oxygen 51.55 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaMg(AsO₄)(OH)•5(H₂O)

IMA Status:

Approved IMA 1989

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named after the composition (Ca, Mg, As).

Camgasite Crystallography

Axial Ratios:

a:b:c =1.2031:1:2.1323

Cell Dimensions:

a = 9.18, b = 7.63, c = 16.27, Z = 4; beta = 128° V = 898.02 Den(Calc)= 2.30

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.42(1), 7.28(1), 4(0.8),

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Physical Properties of Camgasite

Cleavage:

{100} Indistinct, {001} Indistinct

Color:

Colorless.

Density:

2.4

Diaphaneity:

Transparent to Translucent

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Camgasite

Gladstone-Dale:

CI meas= 0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2393,KPDmeas= 0.2293,KC= 0.2324
Ncalc = 1.53 - 1.56

Optical Data:

Biaxial (+), a=1.54, b=1.548, g=1.563, bire=0.0230, 2V(Calc)=74, 2V(Meas)=74.

Calculated Properties of Camgasite

Electron Density:

Bulk Density (Electron Density)=2.41 gm/cc
note: Specific Gravity of Camgasite =2.40 gm/cc.

Fermion Index:

Fermion Index = 0.0082576728
Boson Index = 0.9917423272

Photoelectric:

PE_Camgasite= 17.41 barns/electron
U=PE_Camgasite x rElectron Density= 42.00 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Camgasite is Not Radioactive

Camgasite Classification

Dana Class:

42.07.16.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.07)where (AB)5 (XO4)3 Zq ï¿½ x(H2O)

(42.07.16)Dana Group

42.07.16.01 Camgasite CaMg(AsO4)(OH)•5(H2O) P 2₁/m 2/m

Strunz Class:

08.DJ.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DJ -With large and medium-sized cations, (OH, etc.):RO4 = 1:l

08.DJ.15 Camgasite CaMg(AsO4)(OH)•5(H2O) P 2₁/m 2/m

Other Camgasite Information

References:

PHYS. PROP.(Am.Min.,Vol.76,p2021,1991) OPTIC PROP.(Am.Min.,Vol.76,p2021,1991)

See Also:

Links to other databases for Camgasite :
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 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Camgasite Specimen Label here :

Camgasite

CaMg(AsO4)(OH)•5(H2O)
Dana No: 42.07.16.01 Strunz No: 08.DJ.15
Locality:

Notes:

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