Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Junitoite

Big Photo

Christmas Mine (Red Bird shafts; Inspiration Mine; Hackberry shafts), Christmas, Christmas area, Banner District, Dripping Spring Mts, Gila Co., Arizona, USA
© Wm. Wise

Show Junitoite Photos (5)
Formula:
CaZn
 
2
[Si
 
2
O
 
7
] · H
 
2
O
System:OrthorhombicColour:colourless
Hardness:4½
This page provides mineralogical data about Junitoite.

Classification of Junitoite

IMA status:Approved
Strunz 8th edition ID:8/C.08-20
Nickel-Strunz 10th (pending) edition ID:9.BD.15

9 : SILICATES (Germanates)
B : Sorosilicates
D : Si2O7 groups, with additional anions; cations in tetrahedral [4] and greater coordination
Dana 8th edition ID:56.2.1.1

56 : SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
2 : Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Hey's CIM Ref.:14.7.17

14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn
mindat.org URL:http://www.mindat.org/min-2123.html
Please feel free to link to this page.

Type Occurrence of Junitoite

Type Locality:Christmas Mine (Red Bird shafts; Inspiration Mine; Hackberry shafts), Christmas, Christmas area, Banner District, Dripping Spring Mts, Gila Co., Arizona, USA
Year of Discovery:1976

Physical Properties of Junitoite

Lustre:Adamantine
Diaphaneity (Transparency):Transparent
Colour:colourless
Hardness (Mohs):4½
Cleavage:Distinct/Good
{010} good.
Density (measured):3.5 g/cm3

Crystallography of Junitoite

Crystal System:Orthorhombic
Cell Parameters:a = 12.51Å, b = 6.31Å, c = 8.56Å
Ratio:a:b:c = 1.983 : 1 : 1.357
Unit Cell Volume:V 675.71 ų (Calculated from Unit Cell)
Morphology:Crystals to 5mm with hemimorphic development.

Optical Data of Junitoite

Type:Biaxial
RI values: nα = 1.656 nβ = 1.664 nγ = 1.672
2V:Measured: 86° , Calculated: 88°
Maximum Birefringence:δ = 0.016

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

Chemical Properties of Junitoite

Formula:
CaZn
 
2
[Si
 
2
O
 
7
] · H
 
2
O
Essential elements:Ca, H, O, Si, Zn
All elements listed in formula:Ca, H, O, Si, Zn

Relationship of Junitoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.BD.05Bertrandite
Be
 
4
[(OH)
 
2
|Si
 
2
O
 
7
]
9.BD.10Hemimorphite
Zn
 
4
[(OH)
 
2
|Si
 
2
O
 
7
] · H
 
2
O
9.BD.20Axinite-(Fe)
Ca
 
2
Fe
2+
 
Al
 
2
[OH|BSi
 
4
O
 
15
]
9.BD.20Axinite-(Mg)
Ca
 
2
MgAl
 
2
[OH|BSi
 
4
O
 
15
]
9.BD.20Axinite-(Mn)
Ca
 
2
Mn
2+
 
Al
 
2
[OH|BSi
 
4
O
 
15
]
9.BD.20Tinzenite
(Ca,Mn
2+
 
,Fe
2+
 
)
 
3
Al
 
2
[OH|BSi
 
4
O
 
15
]
9.BD.25Vistepite
SnMn
 
4
B
 
2
Si
 
4
O
 
16
(OH)
 
2
9.BD.30Boralsilite
Al
 
16
B
 
6
Si
 
2
O
 
27
9.BD.35Werdingite
(Mg,Fe)
 
2
Al
 
14
Si
 
4
B
 
4
O
 
37
Related Minerals - Hey's Index Grouping:

- +
14.7.1Sanbornite
Ba
 
2
[Si
 
4
O
 
10
]
14.7.2Krauskopfite
BaSi
 
2
O
 
5
·3H
 
2
O
14.7.3Walstromite
BaCa
 
2
[Si
 
3
O
 
9
]
14.7.4Macdonaldite
BaCa
 
4
Si
 
16
O
 
36
(OH)
 
2
·10H
 
2
O
14.7.5Ericssonite
BaMn
2+
2
Fe
3+
 
[O|OH|Si
 
2
O
 
7
]
14.7.6Orthoericssonite
BaMn
2+
2
Fe
3+
 
[O|OH|Si
 
2
O
 
7
]
14.7.7Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
14.7.8Andrémeyerite
BaFe
2+
2
[Si
 
2
O
 
7
]
14.7.9Pellyite
Ba
 
2
Ca(Fe,Mg)
 
2
Si
 
6
O
 
17
14.7.10Taikanite
Sr
 
3
BaMn
2+
2
[O|Si
 
2
O
 
6
]
 
2
14.7.11Willemite
Zn
 
2
[SiO
 
4
]
14.7.12Hemimorphite
Zn
 
4
[(OH)
 
2
|Si
 
2
O
 
7
] · H
 
2
O
14.7.13Zincsilite
Zn
 
3
Si
 
4
O
 
10
(OH)
 
2
·4H
 
2
O
14.7.14Hardystonite
Ca
 
2
Zn[Si
 
2
O
 
7
]
14.7.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
14.7.16Clinohedrite
CaZn[SiO
 
4
] · H
 
2
O
14.7.18Larsenite
PbZn[SiO
 
4
]
14.7.19Esperite
PbCa
 
3
Zn
 
4
[SiO
 
4
]
 
4
14.7.20Hodgkinsonite
Mn
2+
 
Zn
 
2
[(OH)
 
2
|SiO
 
4
]
14.7.21Gerstmannite
(Mg,Mn
2+
 
)Zn[(OH)
 
2
|SiO
 
4
]
14.7.22Gageite
Mn
 
21
O
 
3
(Si
 
4
O
 
12
)
 
2
(OH)
 
20
14.7.23Franklinfurnaceite
Ca
 
2
FeMn
 
3
MnZn
 
2
Si
 
2
O
 
10
(OH)
 
8

Other Names for Junitoite

Synonyms:
IMA1975-042
Other Languages:
German:Junitoit
Russian:Джунитоит
Spanish:Junitoita

Other Information

Thermal Behaviour:Strongly pyroelectric.
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 Junitoite

Reference List:American Mineralogist (1976): 61: 1255-1258.

Mineralogical Magazine (1985): 49: 91.

Internet Links for Junitoite

Search Engines:
  • Look for Junitoite on Google
  • Look for Junitoite images on Google
    • External Links:
  • Look for Junitoite on Webmineral
  • Look for Junitoite on Athena Mineralogy
  • Look for Junitoite on Wikipedia
  • Look for Junitoite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Junitoite in the Natural History Museum (London) online catalogue
  • Junitoite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • rare and unusual minerals mainly crystallized
  • Buy from David K Joyce minerals
  • Wilensky Fine Minerals
  • Buy Fine Minerals from mineralsweb.com
  • Buy minerals from Mineralium.com
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Wendel Minerals - Auktion & Shop
  • High-end worldwide specimens & outstanding customer service
  • Lapis Mineral Magazin
  • Find Junitoite on www.crystalclassics.co.uk
  • Search for - Junitoite - on e-Rocks Mineral Sales & Auctions
  • The Arkenstone - Fine Minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

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

    Localities for Junitoite

    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.
    (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.
    USA
     
    • Arizona
      • Gila Co.
        • Dripping Spring Mts
          • Banner District
            • Christmas area
              • Christmas
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 231.
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 264; Williams, S.A. (1976), Junitoite, a new hydrated calcium zinc silicate from Christmas, AZ, Am.Min.: 61: 1255-1258.
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Dunn(1995):Pt3:414.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. Current server date and time: 6th Nov 2009 10:28:19