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Parascholzite
A valid IMA mineral species
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About Parascholzite
Formula:
CaZn2(PO4)2 · 2H2O
Colour:
Colourless to white
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
3.12
Crystal System:
Monoclinic
Name:
Named from the Greek 'para' for near, and scholzite, for the polymorphic relationship to that mineral.
Type Locality:
Dimorph of:
This page provides mineralogical data about Parascholzite.
Unique Identifiers
Mindat ID:
3111
Long-form identifier:
mindat:1:1:3111:6
IMA Classification of Parascholzite
Approved
IMA Formula:
CaZn2+2(PO4)2(H2O)2
Approval year:
1980
First published:
1981
Classification of Parascholzite
8.CA.45
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
40.2.5.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
19.6.8
19 : Phosphates
6 : Phosphates of Zn
19 : Phosphates
6 : Phosphates of Zn
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Pslz | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Parascholzite
Vitreous
Transparency:
Translucent
Colour:
Colourless to white
Streak:
White
Hardness:
4 on Mohs scale
Parting:
The composition plane of polysynthetic twins is a parting surface.
Density:
3.12(3) g/cm3 (Measured) 3.10 g/cm3 (Calculated)
Optical Data of Parascholzite
Type:
Biaxial (+)
RI values:
nα = 1.587(2) nβ = 1.588(2) nγ = 1.603(2)
2V:
Measured: 25° (2), Calculated: 29°
Max. Birefringence:
δ = 0.016
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r > v
Chemistry of Parascholzite
Mindat Formula:
CaZn2(PO4)2 · 2H2O
Element Weights:
Crystallography of Parascholzite
Crystal System:
Monoclinic
Cell Parameters:
a = 17.864(5) Å, b = 7.422(2) Å, c = 6.674(2) Å
β = 106.45(1)°
β = 106.45(1)°
Ratio:
a:b:c = 2.407 : 1 : 0.899
Unit Cell V:
848.66 Ă
Âł (Calculated from Unit Cell)
Z:
4
Twinning:
By reflection on {100}, also the composition plane; may be simple, but typically polysynthetic.
Comment:
Point Group: 2/m or m.; Space Group: C2/c or Cc.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
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2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0011012 | Parascholzite | Taxer K J (1992) Order-disorder and polymorphism of the compound with the composition of scholzite, CaZn2[PO4]2*2H2O Zeitschrift fur Kristallographie 198 239-253 |  | 1992 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.55 Ă | (100) |
| 2.804 Ă | (80) |
| 4.158 Ă | (50) |
| 3.406 Ă | (40) |
| 2.779 Ă | (40) |
| 4.53 Ă | (30) |
| 2.586 Ă | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) |
Type Occurrence of Parascholzite
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, B14318, B14345.
Associated Minerals at Type Locality:
Synonyms of Parascholzite
Other Language Names for Parascholzite
Common Associates
Associations Based on Photo Data:
| 7 photos of Parascholzite associated with Scholzite | CaZn2(PO4)2 · 2H2O |
| 4 photos of Parascholzite associated with Tarbuttite | Zn2(PO4)(OH) |
| 2 photos of Parascholzite associated with Ehrleite | Ca4Be3Zn2(PO4)6 · 9H2O |
| 1 photo of Parascholzite associated with Kingsmountite | Ca3Mn2+FeAl4(PO4)6(OH)4 · 12H2O |
| 1 photo of Parascholzite associated with Phosphophyllite | Zn2Fe 2+(PO4)2 · 4H2O |
| 1 photo of Parascholzite associated with Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O |
| 1 photo of Parascholzite associated with Hopeite | ZnZn2(PO4)2 · 4H2O |
Related Minerals - Strunz-mindat Grouping
| 8.CA. | Apexite | NaMg(PO4) · 9H2O |
| 8.CA. | BrandĂŁoite | BeAl2(PO4)2(OH)2(H2O)5 |
| 8.CA. | Davidlloydite | Zn3(AsO4)2 · 4H2O |
| 8.CA.05 | Parafransoletite | Ca3Be2(PO4)2(PO3OH)2 · 4H2O |
| 8.CA.05 | Fransoletite | Ca3Be2(PO4)2(PO3OH)2 · 4H2O |
| 8.CA.10 | Ehrleite | Ca4Be3Zn2(PO4)6 · 9H2O |
| 8.CA.15 | Faheyite | Be2Mn2+Fe3+2(PO4)4 · 6H2O |
| 8.CA.20 | Mccrillisite | NaCs(Be,Li)Zr2(PO4)4 · 1-2H2O |
| 8.CA.20 | Gainesite | Na(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2O |
| 8.CA.20 | Selwynite | NaK(Be,Al)Zr2(PO4)4 · 2H2O |
| 8.CA.25 | Pahasapaite | Li8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O |
| 8.CA.30 | Nizamoffite | Mn2+Zn2(PO4)2(H2O)4 |
| 8.CA.30 | Arsenohopeite | Zn3(AsO4)2 · 4H2O |
| 8.CA.30 | Hopeite | ZnZn2(PO4)2 · 4H2O |
| 8.CA.35 | Warikahnite | Zn3(AsO4)2 · 2H2O |
| 8.CA.40 | Phosphophyllite | Zn2Fe 2+(PO4)2 · 4H2O |
| 8.CA.42 | Steinmetzite | Zn2Fe3+(PO4)2(OH) · 3H2O |
| 8.CA.45 | Scholzite | CaZn2(PO4)2 · 2H2O |
| 8.CA.50 | Keyite | Cu2+3Zn4Cd2(AsO4)6 · 2H2O |
| 8.CA.55 | Pushcharovskite | K0.6Cu18[AsO2(OH)2]4[AsO3OH]10(AsO4)(OH)9.6 · 18.6H2O |
| 8.CA.60 | Prosperite | Ca2Zn4(AsO4)4 · H2O |
| 8.CA.65 | Gengenbachite | KFe3+3(PO3OH)4[PO2(OH)2]2 · 6H2O |
| 8.CA.70 | Parahopeite | Zn3(PO4)2 · 4H2O |
| 8.CA.70 | Reaphookhillite | MgZn2(PO4)2 · 4H2O |
| 8.CA.75 | Stergiouite | CaZn2(AsO4)2 · 4H2O |
| 8.CA.80 | Limousinite | BaCa[Be4P4O16] · 6H2O |
| 8.CA.85 | Minjiangite | BaBe2(PO4)2 |
| 8.CA.85 | Wilancookite | (Ba5Li2â»)Ba6Be24P24O96 · 26H2O |
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.
Internet Links for Parascholzite
mindat.org URL:
https://www.mindat.org/min-3111.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Parascholzite
Reference List:
Sturman, B. Darko, Rouse, Roland C., Dunn, Pete J. (1981) Parascholzite, a new mineral from Hagendorf, Bavaria, and its relationship to scholzite. American Mineralogist, 66 (7-8) 843-851
Taxer, Karlheinz (1992) Order-disorder and polymorphism of the compound with the composition of scholzite, CaZn2[PO4]2· 2H2O. Zeitschrift fĂŒr Kristallographie, 198 (3). 239-255 doi:10.1524/zkri.1992.198.3-4.239
Localities for Parascholzite
Showing 14 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Gallasch (2026) |
Belgium | |
| Blondieau et al. (2016) |
Europe | |
| Berbain et al. (2012) | |
France | |
| Berbain et al. (2012) |
Germany | |
| Dill et al. (2013) |
| [Amer.Min. (1981) +2 other references | |
| Bender et al. (1994) |
Japan | |
| Yamada (2004) |
Russia | |
| Lykova I. S. et al. (2017) |
Spain | |
| Joan Abella i Creus (2008) |
USA | |
| Whitmore et al. (2004) +2 other references |
| Jason B. Smith collection +1 other reference |
| Rocks & Minerals: 60: 117. +1 other reference |
Zambia | |
| Joe Cilen +1 other reference |
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Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA