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Clinohedrite

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Formula:
CaZn(SiO4) · H2O
System:
Monoclinic
Colour:
Colorless, pale ...
Hardness:
Name:
Named in 1898 by Samuel L. Penfield and Harry W. Foote from the Greek κλινειν "to incline and εδρα hedra, for face, for the characteristic inclined faces of the crystals.

Classification of Clinohedrite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
9.AE.30

9 : SILICATES (Germanates)
A : Nesosilicates
E : Nesosilicates with additional anions (O,OH,F,H2O); cations in tetrahedral [4] coordination
52.2.1.2

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
2 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
14.7.16

14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn
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First Recorded Occurrence of Clinohedrite

General Appearance of First Recorded Material:
extremely thin to thick fracture coatings, in cavities, rarely as crusts of free growing crystals.
Year of Discovery:
1898
Geological Setting of First Recorded Material:
In hydrothermally altered, metamorphosed zinc-manganese-iron silicate-oxide orebody.
Associated Minerals at First Recorded Locality:

Physical Properties of Clinohedrite

Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colorless, pale amethystine (rare)
Streak:
White
Hardness (Mohs):

Crystallography of Clinohedrite

Crystal System:
Monoclinic
Cell Parameters:
a = 5.09Å, b = 15.82Å, c = 5.38Å
β = 103.39°
Ratio:
a:b:c = 0.322 : 1 : 0.34
Unit Cell Volume:
V 421.44 ų (Calculated from Unit Cell)

Crystallographic forms of Clinohedrite

Crystal Atlas:
Image Loading
Click on an icon to view
Clinohedrite no.2 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

Toggle
Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

View
Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Clinohedrite

Type:
Biaxial (-)
RI values:
nα = 1.662 nβ = 1.667 nγ = 1.669
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak

Chemical Properties of Clinohedrite

Formula:
CaZn(SiO4) · H2O
Essential elements:
All elements listed in formula:
Common Impurities:
Fe,Al,Mn,Mg

Relationship of Clinohedrite to other Species

9.AE.05BerylliteBe3(SiO4)(OH)2 · H2O
9.AE.10EuclaseBeAl(SiO4)(OH)
9.AE.15SverigeiteNaMnMgSnBe2(SiO4)3(OH)
9.AE.20HodgkinsoniteMn2+Zn2(SiO4)(OH)2
9.AE.25GerstmanniteMnMgZn(SiO4)(OH)2
9.AE.35StringhamiteCaCu(SiO4) · H2O
9.AE.40Katoptrite(Mn2+,Mg)13(Al,Fe3+)4Sb25+(SiO4)2O20
9.AE.45YeatmaniteZn6Mn92+Sb25+(SiO4)4O12
9.AE.50SphaerobertranditeBe3(SiO4)(OH)2
14.7.1SanborniteBa2(Si4O10)
14.7.2KrauskopfiteBaSi2O5 · 3H2O
14.7.3WalstromiteBaCa2(Si3O9)
14.7.4MacdonalditeBaCa4Si16O36(OH)2 · 10H2O
14.7.5EricssoniteBaMn22+Fe3+(Si2O7)O(OH)
14.7.6Ericssonite-2OBaMn22+Fe3+(Si2O7)O(OH)
14.7.7GillespiteBaFe2+[Si4O10]
14.7.8AndrémeyeriteBaFe22+(Si2O7)
14.7.9PellyiteBa2Ca(Fe,Mg)2Si6O17
14.7.10TaikaniteSr3BaMn22+(Si4O12)O2
14.7.11WillemiteZn2SiO4
14.7.12HemimorphiteZn4Si2O7(OH)2 · H2O
14.7.13ZincsiliteZn3(Si4O10)(OH)2 · 4H2O
14.7.14HardystoniteCa2Zn(Si2O7)
14.7.15PetedunniteCa(Zn,Mn2+,Mg,Fe2+)Si2O6
14.7.17JunitoiteCaZn2Si2O7 · H2O
14.7.18LarsenitePbZnSiO4
14.7.19EsperitePbCa2Zn3(SiO4)3
14.7.20HodgkinsoniteMn2+Zn2(SiO4)(OH)2
14.7.21GerstmanniteMnMgZn(SiO4)(OH)2
14.7.22GageiteMn21(Si4O12)2O3(OH)20
14.7.23FranklinfurnaceiteCa2Fe3+Mn32+Mn3+(Zn2Si2O10)(OH)8

Other Names for Clinohedrite

Name in Other Languages:

Other Information

Bright orange (SW UV); dull orange (LW UV).
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:
None.

References for Clinohedrite

Reference List:
Palache, Charles (1935), USGS PP 180: 106.

Dunn, P.J., et al (1983): American Mineralogy: 68: 1033-1037.

Dunn, P.J. (1995): Pt3: 365.

Zeitschrift für Kristallographie: 144: 377-392.

Internet Links for Clinohedrite

Localities for Clinohedrite

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.
China
 
  • Gansu Province
    • Gannan Autonomous Prefecture
      • Luqu Co.
Hanjie Wen, Carignan, J., Yuzhuo Qiu, and Shirong Liu (2006): Environmental Science and Technology 40(4), 1126-1132.
USA
 
  • Arizona
    • Gila Co.
      • Dripping Spring Mts
        • Banner District
          • Christmas area
            • Christmas
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 177; Rocks & Min.:60:238; Dr. Sidney Williams, AZ
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Palache(1935):106; Dunn, et al: Am. Min.:68:1033-1037 (1983); Dunn(1995):Pt3:365.
Steven Phillips
Van King; Chester S. Lemanski, Jr.; Ronald DeBlois.
Weissman purchased specimen
Mineral and/or Locality  
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