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Hillite

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Roderick J. Hill
Formula:
Ca2(Zn,Mg)(PO4)2 · 2 H2O
Colour:
colourless to greenish grey
Lustre:
Vitreous, Silky
Hardness:
Specific Gravity:
3.16
Crystal System:
Triclinic
Name:
Honouring Dr. Roderick J. Hill (1949, Adelaide, Australia - ), mineralogist and CSIRO management, including Chief of Mineral Research Division at Melbourne, Australia. He first described this mineral as 'zincian collinsite' in 1973. It was later named in his honor by Olga V. Yakubovich, Werner Massa, Ruslan P. Liferovich, Polina G. Gavrilenko, Alla N. Bogdanova, Pekka Tuisku.
This page provides mineralogical data about Hillite.


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Classification of HilliteHide

Approved
Approval Year:
2003
First Published:
2003
8.CG.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1

Physical Properties of HilliteHide

Vitreous, Silky
Transparency:
Transparent, Translucent
Colour:
colourless to greenish grey
Streak:
white
Hardness:
3½ on Mohs scale
Cleavage:
Perfect
on {010} and {001}
Density:
3.16 g/cm3 (Measured)    

Chemical Properties of HilliteHide

Formula:
Ca2(Zn,Mg)(PO4)2 · 2 H2O
IMA Formula:
Ca2Zn(PO4)2 · 2H2O

Crystallography of HilliteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.736 Å, b = 6.767 Å, c = 5.462 Å
α = 97.41°, β = 108.59°, γ = 107.19°
Ratio:
a:b:c = 0.848 : 1 : 0.807
Unit Cell V:
186.05 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.69 (100)
3.04 (40)
3.13 (35)
6.24 (35)

Type Occurrence of HilliteHide

General Appearance of Type Material:
Minute tabular crystals to 0.05 mm and wedge-shaped tabular aggregates to 0.2 mm
Associated Minerals at Type Locality:

Synonyms of HilliteHide

Other Language Names for HilliteHide

German:Hillit
Russian:Хиллит
Simplified Chinese:磷水锌钙石
Traditional Chinese:磷水鋅鈣石

Common AssociatesHide

Associated Minerals Based on Photo Data:
Scholzite8 photos of Hillite associated with Scholzite on mindat.org.
Collinsite7 photos of Hillite associated with Collinsite on mindat.org.
Cryptomelane1 photo of Hillite associated with Cryptomelane on mindat.org.
Chalcophanite1 photo of Hillite associated with Chalcophanite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CG.05CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2OTric.
8.CG.05CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2OTric. 1 : P1
8.CG.05FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2OTric. 1 : P1
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2OTric.
8.CG.05MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2OTric. 1 : P1
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric.
8.CG.05β-RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2OTric.
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
8.CG.10BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2OMon.
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.15FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)Mon. 2/m : B2/m
8.CG.15LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)Mon.
8.CG.15MounanaitePbFe3+2(VO4)2(OH,F)2Mon. 2/m : B2/m
8.CG.15ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2OMon.
8.CG.15CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2Mon. 2/m : B2/m
8.CG.15KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
8.CG.15CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15NickellotharmeyeriteCa(Ni,Fe3+,Co)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2Mon. 2/m : B2/m
8.CG.15Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)Mon. 2/m : B2/m
8.CG.20GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)Tric. 1 : P1
8.CG.20HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2OTric.
8.CG.20ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)Tric. 1 : P1
8.CG.20RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2OTric.
8.CG.20PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)Tric.
8.CG.20LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)Tric. 1 : P1
8.CG.25Pottsite(Pb3xBi4-2x)(VO4)4·H2O (0.8 < x < 1.0)Tet. 4/m : I41/a
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2OTric. 1 : P1

Fluorescence of HilliteHide

weak, greenish yellow fluorescence in short-wave UV light

Other InformationHide

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 HilliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hill, R.J., Johnson, J.E., Jones, J.B. (1973) Scholzite and other phosphate minerals from Reaphook Hill, South Australia. Neues Jahrbuch für Mineralogie - Monatshefte, 1-8.
Hill, R.J., Milnes, A.R. (1974) Phosphate minerals from Reaphook Hill, Flinders Ranges, South Australia. Mineralogial Magazine: 39: 684-695.
Yakubovich, O.V., Massa, W., Liferovich, R.P., Gavrilenko, P.G., Bogdanova, A.N., Tuisku, P. (2003) Hillite, a new member of the fairfieldite group: its description and crystal structure. Canadian Mineralogist: 41: 981-988.
Jambor, J.L., Roberts, A.C. (2004) New mineral names. American Mineralogist: 89: 467-471.
Mandarino, J.A. (2004) New minerals. Canadian Mineralogist: 42: 921-945.

Internet Links for HilliteHide

Localities for HilliteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia (TL)
 
  • South Australia
    • Flinders Ranges
      • South Flinders Ranges
        • Martins Well
Lapis 28(12), 46 (2003)
Mineral and/or Locality  
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