Collinsite Mineral Data

General Collinsite Information

Chemical Formula:

Ca2(Mg,Fe++)(PO4)2•2(H2O)

Composition:

Molecular Weight = 338.32 gm

Calcium 23.69 % Ca 33.15 % CaO

Magnesium 5.39 % Mg 8.93 % MgO

Iron 4.13 % Fe 5.31 % FeO

Phosphorus 18.31 % P 41.96 % P₂O₅

Hydrogen 1.19 % H 10.65 % H₂O

Oxygen 47.29 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Mg_0.75Fe²⁺_0.25(PO₄)₂•2(H₂O)

Environment:

Secondary weathering product typically incrusting other minerals.

IMA Status:

Valid Species (Pre-IMA) 1927

Locality:

Francois Lake, south of Babine Lake, Coast district, British Columbia, and as large crystals from the Big Fish River–Rapid Creek area, Yukon Territory, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for William Henry Collins (1878-1937), formerly Director of the Geological Survey of Canada.

Name Pronunciation:

Collinsite + Pronunciation

Synonym:

ICSD 4258

PDF 26-1063

Collinsite Image

Images:

Collinsite

Comments: Half nodule of nearly pure collinsite. The center of the specimen is a small piece of volcanic rock surrounded by collinsite.
Location: Francois Lake, British Columbia, Canada. Scale: 7 x 5.5 cm.
© John Veevaert

Collinsite Crystallography

Axial Ratios:

a:b:c =0.8457:1:0.8025

Cell Dimensions:

a = 5.734, b = 6.78, c = 5.441, Z = 1; alpha = 97.29°, beta = 108.56°, gamma = 107.28° V = 189.93 Den(Calc)= 2.96

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 3.04(1), 2.682(0.9), 2.713(0.8),

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

Brotherton P D , Maslen E N , Pryce M W , White A H , Australian Journal of Chemistry , 27 (1974) p.653-656, Crystal structure of collinsite

Physical Properties of Collinsite

Cleavage:

{001} Perfect, {010} Perfect

Color:

Colorless, White, Light brown.

Density:

2.95

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

3-3.5 - Calcite-Copper Penny

Luminescence:

Non-fluorescent.

Luster:

Silky

Streak:

white

Optical Properties of Collinsite

Gladstone-Dale:

CI meas= -0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2124,KPDmeas= 0.2182,KC= 0.2105
Ncalc = 1.62 - 1.64

Optical Data:

Biaxial (+), a=1.632, b=1.642, g=1.657, bire=0.0250

Calculated Properties of Collinsite

Electron Density:

Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Collinsite =3.03 gm/cc.

Fermion Index:

Fermion Index = 0.0068115336
Boson Index = 0.9931884664

Photoelectric:

PE_Collinsite= 5.11 barns/electron
U=PE_Collinsite x rElectron Density= 15.51 barns/cc.

Radioactivity:

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

Collinsite Classification

Dana Class:

40.02.02.03 (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

Strunz Class:

08.CG.05 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.05 Collinsite Ca2(Mg,Fe)(PO4)2•2(H2O) P1 1

08.CG.05 Gaitite Ca2Zn(AsO4)2•2(H2O) P1 1

08.CG.05 Cassidyite Ca2(Ni,Mg)(PO4)2•2(H2O) P1 1

08.CG.05 Fairfieldite Ca2(Mn,Fe)(PO4)2•2(H2O) P1 1

08.CG.05 Messelite Ca2(Fe,Mn)(PO4)2•2(H2O) P1 1

08.CG.05 Parabrandtite Ca2Mn(AsO4)•2(H2O) P1,P 1 Tri

08.CG.05 Uranophane-beta Ca[(UO2)SiO3(OH)]2•(H2O) P 2₁/a 2/m

08.CG.05 Talmessite Ca2Mg(AsO4)2•2(H2O) P1 1

08.CG.05 Hillite! Ca2(Zn,Mg)[PO4]2•2(H2O) P1 1

Other Collinsite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Collinsite :
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

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

Collinsite

Ca2(Mg,Fe++)(PO4)2•2(H2O)
Dana No: 40.02.02.03 Strunz No: 08.CG.05
Locality:

Notes: