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Cattiite

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Formula:
Mg3(PO4)2 · 22H2O
System:
Triclinic
Colour:
colourless
Hardness:
2
Name:
for Prof. Michele Catti (born 1945), Italy
This page provides mineralogical data about Cattiite.

Classification of Cattiite

Approved 2000
8.CE.50

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
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Type Occurrence of Cattiite

General Appearance of Type Material:
small massive aggregates and very small crystals
Year of Discovery:
2000
Geological Setting of Type Material:
in a vein of dolomite carbonatite in forsterite-magnetite ore

Physical Properties of Cattiite

Adamantine, Pearly
Diaphaneity (Transparency):
Transparent
Colour:
colourless
Streak:
white
Hardness (Mohs):
2
Hardness Data:
Measured
Cleavage:
Perfect
(001)
Fracture:
Irregular/Uneven
Density:
1.65 g/cm3 (Measured)    1.64 g/cm3 (Calculated)

Crystallography of Cattiite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 6.932Å, b = 6.925Å, c = 16.154Å
α = 82.21°, β = 89.7°, γ = 119.51°
Ratio:
a:b:c = 1.001 : 1 : 2.333
Unit Cell Volume:
V 666.3 ų
Z:
1

Optical Data of Cattiite

Type:
Biaxial (-)
RI values:
nα = 1.459 nβ = 1.470 nγ = 1.470
Max Birefringence:
δ = 0.011
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic

Chemical Properties of Cattiite

Formula:
Mg3(PO4)2 · 22H2O
All elements listed in formula:

Relationship of Cattiite to other Species

8.CE.05Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O
8.CE.05GeigeriteMn52+(AsO4)2(HAsO4)2 · 10H2O
8.CE.10NewberyiteMg(HPO4) · 3H2O
8.CE.15BrassiteMg(HAsO4) · 4H2O
8.CE.20PhosphorrössleriteMg(HPO4) · 7H2O
8.CE.20RössleriteMg(HAsO4) · 7H2O
8.CE.25MetaswitzeriteMn3(PO4)2 · 4H2O
8.CE.25Switzerite(Mn,Fe)3(PO4)2 · 7H2O
8.CE.30LindackeriteCuCu4(AsO4)2(HAsO4)2 · 8-9H2O
8.CE.30OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2O
8.CE.30VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2O
8.CE.30PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2O
8.CE.30KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2O
8.CE.35BobierriteMg3(PO4)2 · 8H2O
8.CE.40AnnabergiteNi3(AsO4)2 · 8H2O
8.CE.40ArupiteNi3(PO4)2 · 8H2O
8.CE.40Barićite(Mg,Fe)3(PO4)2 · 8H2O
8.CE.40ErythriteCo3(AsO4)2 · 8H2O
8.CE.40FerrisymplesiteFe33+(AsO4)2(OH)3 · 5H2O
8.CE.40HörnesiteMg3(AsO4)2 · 8H2O
8.CE.40KöttigiteZn3(AsO4)2 · 8H2O
8.CE.40Manganohörnesite(Mn,Mg)3(AsO4)2 · 8H2O
8.CE.40ParasymplesiteFe32+(AsO4)2 · 8H2O
8.CE.40VivianiteFe32+(PO4)2 · 8H2O
8.CE.40PakhomovskyiteCo3(PO4)2 · 8H2O
8.CE.45SymplesiteFe32+(AsO4)2 · 8H2O
8.CE.55KoninckiteFe3+PO4 · 3H2O
8.CE.60KaňkiteFeAsO4 · 3.5H2O
8.CE.65SteigeriteAl(VO4) · 3H2O
8.CE.70MetaschoderiteAl2(PO4)(VO4) · 6H2O
8.CE.70SchoderiteAl2(PO4)(VO4) · 8H2O
8.CE.75MalhmooditeFeZr(PO4)2 · 4H2O
8.CE.75ZigrasiteMgZr(PO4)2 · 4H2O
8.CE.75Unnamed (Ca-analogue of Zigrasite)CaZr[PO4]2 · 4H2O
8.CE.80SantabarbaraiteFe33+(PO4)2(OH)3 · 5H2O
8.CE.85Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)

Other Names for Cattiite

Name in Other Languages:
German:Cattiit
Simplified Chinese:卡水磷镁石
Spanish:Cattiita
Traditional Chinese:卡水磷鎂石

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Cattiite

Reference List:
Britvin, S.N., G. Ferraris, G. Ivaldi, A.N. Bogdanova & N.V. Chukanov (2002) Cattiite, Mg3(PO4)2·22H2O, a new mineral from Zhelezny mine (Kovdor Massif, Kola Peninsula, Russia). Neues Jahrbuch für Mineralogie, Monatshefte 2002: 160-168.

Zeitschrift für Kristallographie: 155: 53-64.

Internet Links for Cattiite

Localities for Cattiite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Russia (TL)
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Kovdor Massif
S.N. Britvin, G. Ferraris, G. Ivaldi, A.N. Bogdanova & N.V. Chukanov (2002), Neues Jahrbuch für Mineralogie, Monatshefte 2002: 160-168.
UK
 
  • England
    • Cornwall
      • Mount's Bay District
        • St Hilary
http://webcache.googleusercontent.com/search?q=cache:8rDhWIquacQJ:rruff.info/doclib/hom/cattiite.pdf+penberthy+croft+mine&cd=48&hl=en&ct=clnk&gl=uk
Mineral and/or Locality  
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