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 Riverï¿½Rapid 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 - Pinacoidal H-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),

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) ï¿½ x(H2O)

(40.02.02)Fairfieldite Subgroup (Triclinic: P-1ï¿½)

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:

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