Anapaite Mineral Data

General Anapaite Information

Chemical Formula:

Ca2Fe++(PO4)2•4(H2O)

Composition:

Molecular Weight = 398.01 gm

Calcium 20.14 % Ca 28.18 % CaO

Iron 14.03 % Fe 18.05 % FeO

Phosphorus 15.56 % P 35.66 % P₂O₅

Hydrogen 2.03 % H 18.11 % H₂O

Oxygen 48.24 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Fe²⁺(PO₄)₂•4(H₂O)

Environment:

In oolitic iron ore, and in the stems of fossil trees (Anapa, Russia); in lacustrine sediments.

IMA Status:

Valid Species (Pre-IMA) 1910

Locality:

In Russia, at an iron mine on Cape Zheleznyi Rog, near Anapa, Taman Peninsula. As fine specimens at Kerch, Crimean Peninsula, Ukrain. Link to MinDat.org Location Data.

Name Origin:

For its discovery near Anapa, Russia.

Name Pronunciation:

Anapaite

Synonym:

ICSD 200477

PDF 34-148

Anapaite Image

Images:

Anapaite

Comments: Specimen of anapaite on limonite. There are two distinct crystal forms of anapaite - both bladed or tabular and spiky (See inset images).
Location: Taman Peninsula, Black Sea, Russia. Scale: 6 x 5 cm.
© John Veevaert

Anapaite Crystallography

Axial Ratios:

a:b:c =0.9316:1:0.8517

Cell Dimensions:

a = 6.41, b = 6.88, c = 5.86, Z = 1; alpha = 101.583°, beta = 104.09°, gamma = 71.055° V = 232.25 Den(Calc)= 2.85

Crystal System:

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

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

By Intensity(I/I_o): 3.135(1), 2.866(0.7), 3.72(0.6),

Forms:

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Forms: ( 1 0 1) ( 0 1 0) ( 1 0 1) ( 1 1 1) ( 0 1 1) ( 1 1 1) ( 1 0 0) ( 0 0 1)

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Crystal Structure:

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Catti M , Ferraris G , Ivaldi G , Bulletin de Mineralogie , 102 (1979) p.314-8, Refinement of the crystal structure of anapaite, Ca2Fe(PO4)2*4H2O:, hydrogen bonding and relationships with the bihydrated phase

Physical Properties of Anapaite

Cleavage:

{???} Perfect, {???} Distinct

Color:

White, Green.

Density:

2.8 - 2.81, Average = 2.8

Diaphaneity:

Transparent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3-4 - Calcite-Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Anapaite

Gladstone-Dale:

CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2211,KPDmeas= 0.2215,KC= 0.2199
Ncalc = 1.62

Optical Data:

Biaxial (+), a=1.602, b=1.613, g=1.649, bire=0.0470, 2V(Calc)=60, 2V(Meas)=54.

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Anapaite

Electron Density:

Bulk Density (Electron Density)=2.82 gm/cc
note: Specific Gravity of Anapaite =2.81 gm/cc.

Fermion Index:

Fermion Index = 0.003481179
Boson Index = 0.996518821

Photoelectric:

PE_Anapaite= 7.30 barns/electron
U=PE_Anapaite x rElectron Density= 20.63 barns/cc.

Radioactivity:

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

Anapaite Classification

Dana Class:

40.02.01.01 (40)Hydrated Phosphates, etc

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

(40.02.01)Dana Group

40.02.01.01 Anapaite Ca2Fe(PO4)2•4(H2O) P1 1

Strunz Class:

08.CH.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CH -With large and medium-sized cations, RO4:H2O < 1:1

08.CH.10 Anapaite Ca2Fe(PO4)2•4(H2O) P1 1

Other Anapaite 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 Anapaite :
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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Ask about Anapaite here :
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Print or Cut-and-Paste your Anapaite Specimen Label here :

Anapaite

Ca2Fe++(PO4)2•4(H2O)
Dana No: 40.02.01.01 Strunz No: 08.CH.10
Locality:

Notes: