Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (3 online) Mindat Auctions

Millisite

Big Photo

Iron Monarch open cut, Iron Knob, Middleback Range, Eyre peninsula, South Australia, Australia
© crocoite.com

Show Millisite Photos (3)
Formula:
(Na,K)CaAl
 
6
[(OH)
 
9
|(PO
 
4
)
 
4
] · 3H
 
2
O
System:TetragonalColour:White, light gray; ...
Hardness:5½
Name:After Mr. F.T. Millis of Lehi, Utah, who collected the first specimens.
This page provides mineralogical data about Millisite.

Classification of Millisite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/D.51-30
Nickel-Strunz 10th (pending) edition ID:8.DL.10

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
Dana 8th edition ID:42.7.9.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
Hey's CIM Ref.:19.8.20

19 : Phosphates
8 : Phosphates of Al and other metals
mindat.org URL:http://www.mindat.org/min-2712.html
Please feel free to link to this page.

Type Occurrence of Millisite

Type Locality:Clay Canyon, Fairfield, Oquirrh Mts, Utah Co., Utah, USA
Year of Discovery:1930
Associated Minerals at type locality:
VarisciteWardite

Occurrences of Millisite

Geological Setting:Phosphatic laterite; weathered phosphorite.

Physical Properties of Millisite

Colour:White, light gray; colourless in transmitted light.
Hardness (Mohs):5½
Density (measured):2.83 g/cm3
Density (calculated):2.87 g/cm3

Crystallography of Millisite

Crystal System:Tetragonal
Cell Parameters:a = 7Å, c = 18.99Å
Ratio:a:c = 1 : 2.713
Unit Cell Volume:V 930.51 ų (Calculated from Unit Cell)
Z:2
Morphology:Chalcedonic crusts or spherules with a fine-fibrous structure.

Optical Data of Millisite

Type:Biaxial (+)
RI values: nα = 1.584 nβ = 1.598 nγ = 1.602
Maximum Birefringence:δ = 0.018

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:small

Chemical Properties of Millisite

Formula:
(Na,K)CaAl
 
6
[(OH)
 
9
|(PO
 
4
)
 
4
] · 3H
 
2
O
Essential elements:Al, Ca, H, Na, O, P
All elements listed in formula:Al, Ca, H, K, Na, O, P

Relationship of Millisite to other Species

Common Associates:
WarditeApatiteCrandalliteAugeliteWavellite
TurquoiseGoethiteLimoniteKaoliniteQuartz
Related Minerals - Nickel-Strunz Grouping):

- +
8.DL.05Foggite
CaAl[(OH)
 
2
|PO
 
4
] · H
 
2
O
8.DL.10Cyrilovite
NaFe
3+
3
[(OH)
 
2
|PO
 
4
]
 
2
 · 2H
 
2
O
8.DL.10Wardite
NaAl
 
3
[(OH)
 
2
|PO
 
4
]
 
2
 · 2H
 
2
O
8.DL.15Agardite-(Nd)
(Nd,La,Ce)Cu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Agardite-(Y)
(Y,Ca)Cu
 
6
[(OH)
 
6
|(AsO
 
4
,HAsO
 
4
)|(AsO
 
4
)
 
2
] · 3H
 
2
O
8.DL.15Agardite-(Ce)
CeCu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Agardite-(La)
(La,Ce)Cu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Goudeyite
(Al,Y)Cu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Mixite
BiCu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Petersite-(Y)
(Y,Ce,Nd)Cu
 
6
[(OH)
 
6
|(PO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Zálesíite
(Ca,Y)Cu
 
6
[(OH)
 
6
|(HAsO
 
4
,AsO
 
4
)|(AsO
 
4
)
 
2
] · 3H
 
2
O
8.DL.15Plumboagardite
(Pb,REE,Ca)Cu
 
6
[(OH)
 
6
|(HAsO
 
4
,AsO
 
4
)|(AsO
 
4
)
 
2
] · 3H
 
2
O
8.DL.15Calciopetersite
CaCu
 
6
[(OH)
 
6
|HPO
 
4
|(PO
 
4
)
 
2
] · 3H
 
2
O
8.DL.20Cheremnykhite
Pb
 
3
Zn
 
3
TeO
 
6
(VO
 
4
)
 
2
8.DL.20Dugganite
Pb
 
3
Zn
 
3
(Te
6+
 
O
 
6
)(AsO
 
4
)
 
2
8.DL.20Kuksite
Pb
 
3
Zn
 
3
TeO
 
6
(PO
 
4
)
 
2
8.DL.20Wallkilldellite-(Mn)
Ca
 
2
Mn
2+
3
[(OH)
 
2
|AsO
 
4
]
 
2
 · 9H
 
2
O
8.DL.20Wallkilldellite-(Fe)
(Ca,Cu)
 
4
Fe
2+
6
[(OH,O)
 
2
|(AsO
 
4
,SiO
 
4
)]
 
4
 · 18H
 
2
O
8.DL.20Wallkilldellite
Related Minerals - Hey's Index Grouping:

- +
19.8.1Montebrasite
LiAl[(OH,F)|PO
 
4
]
19.8.2Brazilianite
NaAl
 
3
[(OH)
 
2
|PO
 
4
]
 
2
19.8.3Wardite
NaAl
 
3
[(OH)
 
2
|PO
 
4
]
 
2
 · 2H
 
2
O
19.8.4Tancoite
LiNa
 
2
Al[OH|HPO
 
4
|PO
 
4
]
19.8.5Bertossaite
(Li,Na)
 
2
(Ca,Fe
2+
 
,Mn
2+
 
)Al
 
4
[(OH,F)|PO
 
4
]
 
4
19.8.6Tinsleyite
KAl
 
2
[OH|(PO
 
4
)
 
2
] · 2H
 
2
O
19.8.7Taranakite
(K,NH
 
4
)Al
 
3
(PO
 
4
)
 
3
OH·9H
 
2
O
19.8.8Francoanellite
K
 
3
Al
 
5
[(HPO
 
4
)
 
3
|PO
 
4
]
 
2
 · 12H
 
2
O
19.8.9Gordonite
MgAl
 
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.8.10Aldermanite
Mg
 
5
Al
 
12
[(OH)
 
11
|(PO
 
4
)
 
4
]
 
2
 · 32H
 
2
O
19.8.11Overite
CaMgAl[OH|(PO
 
4
)
 
2
] · 4H
 
2
O
19.8.12Montgomeryite
Ca
 
4
MgAl
 
4
[(OH)
 
2
|(PO
 
4
)
 
3
]
 
2
 · 12H
 
2
O
19.8.14Foggite
CaAl[(OH)
 
2
|PO
 
4
] · H
 
2
O
19.8.15Gatumbaite
CaAl
 
2
[OH|PO
 
4
]
 
2
 · H
 
2
O
19.8.16Crandallite
CaAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
19.8.17Matulaite
CaAl
 
18
[(OH)
 
5
|(PO
 
4
)
 
3
]
 
4
 · 28H
 
2
O
19.8.19Lehiite
19.8.21Englishite
K
 
3
Na
 
2
Ca
 
10
Al
 
15
[OH|(PO
 
4
)
 
3
]
 
7
 · 26H
 
2
O
19.8.22Kleemanite
ZnAl
 
2
[OH|PO
 
4
]
 
2
 · 3H
 
2
O
19.8.23Mantienneite
KMg
 
2
Al
 
2
Ti[(OH)
 
3
|(PO
 
4
)
 
4
] · 15H
 
2
O
19.8.24Paulkerrite
K(Mg,Mn
2+
 
)
 
2
(Fe
3+
 
,Al,Ti,Mg)
 
2
Ti(PO
 
4
)
 
4
(OH)
 
3
 · 15H
 
2
O

Other Names for Millisite

Other Languages:
German:Millisit
Spanish:Millisita

Other Information

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

References for Millisite

Reference List:Larsen, E.S. and Shannon (1930) American Mineralogist: 15: 307-337.

Larsen, E.S. (1942) American Mineralogist: 27: 294.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 941-942.

Owens, J.P., Z.S. Altschuler, and R. Berman (1960) Millisite in phosphorite from Homeland, Florida. American Mineralogist: 45: 547-561.

Mineralogical Magazine: 37: 598-605.

Articles/Blogs about Millisite

Internet Links for Millisite

Search Engines:
  • Look for Millisite on Google
  • Look for Millisite images on Google
    • External Links:
  • Look for Millisite on Webmineral
  • Look for Millisite on Athena Mineralogy
  • Look for Millisite on Wikipedia
  • Look for Millisite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Millisite in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • High-end worldwide specimens & outstanding customer service
  • Buy minerals from Mineralium.com
  • Search for - Millisite - on e-Rocks Mineral Sales & Auctions
  • Search for Millisite at Thames Valley Minerals
  • Fabre Minerals - search for Millisite specimens
  • rare and unusual minerals mainly crystallized
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • The Arkenstone - Fine Minerals
  • Top quality minerals from Kristalle of California
  • Fine Minerals from Dan Weinrich Minerals
  • Buy from David K Joyce minerals
  • Rare and Unusual minerals at Mineralogical Research Company
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Millisite

    Hide Locality List
    The 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.
    These maps work faster with Firefox!
    (TL) indicates type locality. ? 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.
    Australia
     
    • South Australia
      • Eyre peninsula
        • Middleback Range
          • Iron Knob
    		No reference listed
    Austria
     
    • Carinthia
      • Millstatt lake ridge
        • Spittal
          • Millstatt lake
    		Collection of NHM, Vienna
    Senegal
     
    • Thiès Region
    		http://www.uoguelph.ca/~geology/rocks_for_crops/45senegal.PDF
    Sweden
     
    • Skåne
      • Bromölla
        • Näsum
    		Geologiska Föreningens i Stockholm Förhandlingar 116, 92
    USA
     
    • Florida
      • Polk Co.
        • Central Florida Phosphate District (Bone Valley)
          • Homeland
    		Owens, J.P., Z.S. Altschuler, and R. Berman (1960) Millisite in phosphorite from Homeland, Florida. American Mineralogist: 45: 547-561.
        • Homeland
    		Denicourt, R., Micromounters of New England program, NE meeting program, May 1984
    • Utah
      • Tooele Co.
        • Stansbury Mts
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
      • Utah Co.
        • Oquirrh Mts
          • Fairfield
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 941, 942, 958; UGMS Bull 117 Minerals and Mineral Localities of Utah
    Rocks & Minerals (1970): 45(11): 667-674.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.