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Aquacreptite (of Shepard)

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00305020017271921009285.jpg
Aquacreptite (of Shepard)

Strode's Mill, East Bradford Township, Chester County, Pennsylvania, USA
00305020017271921009285.jpg
Aquacreptite (of Shepard)

Strode's Mill, East Bradford Township, Chester County, Pennsylvania, USA
00305020017271921009285.jpg
Aquacreptite (of Shepard)

Strode's Mill, East Bradford Township, Chester County, Pennsylvania, USA
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About Aquacreptite (of Shepard)Hide

Formula:
Mg4Fe2Si6O19 · 8H2O with some Al2O3, or near
Colour:
Yellowish brown
Lustre:
Dull
Hardness:
2½
Specific Gravity:
2.08
A non-approved, questionable mineral.

Originally reported from West Chester, Westtown Township, Chester Co., Pennsylvania, USA.


Unique IdentifiersHide

Mindat ID:
287
Long-form identifier:
mindat:1:1:287:3

Similar NamesHide

Aquacreptite
Aquacreptite (of Harada)Mg3Si4O10 · 5H2O or near

IMA Classification of Aquacreptite (of Shepard)Hide

IMA status:
'Grandfathered' (first described prior to 1959), Questionable

Classification of Aquacreptite (of Shepard)Hide

Strunz-mindat (2026):
9.HC.25

9 : SILICATES (Germanates)
H : Unclassified silicates
C : With Mn, Fe

Physical Properties of Aquacreptite (of Shepard)Hide

Lustre:
Dull
Colour:
Yellowish brown
Comment:
Orange yellow
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
2.08 g/cm3 (Measured)    

Chemistry of Aquacreptite (of Shepard)Hide

Mindat Formula:
Mg4Fe2Si6O19 · 8H2O with some Al2O3, or near
Element Weights:
Element% weight
O49.717 %
Al26.304 %
Si10.268 %
Fe6.805 %
Mg5.924 %
H0.983 %

Calculated from ideal end-member formula.
Elements listed:
Al, Fe, H, Mg, O, Si - search for minerals with similar chemistry

Synonyms of Aquacreptite (of Shepard)Hide

Aquacreptite (in part)

Related Minerals - Strunz-mindat GroupingHide

9.HC.05Erlianite(Fe,Mg)4(Fe,V)2Si6O15(OH,O)8Orth.
9.HC.10BostwickiteCaMn3+6Si3O16 · 7H2OOrth.
9.HC.20'Almbosite'Fe2+5Fe3+4V6+4Si3O27
9.HC.30'Farallonite'2MgO · W2O5 · SiO2 · nH2O?Mon.
9.HC.35'Hokoite'Mn2+Mn3+2SiO6 · H2O
9.HC.40'Polyhydrite'

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.

Internet Links for Aquacreptite (of Shepard)Hide

References for Aquacreptite (of Shepard)Hide

Localities for Aquacreptite (of Shepard)Hide

Showing 3 localities.

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.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
USA
 
  • Pennsylvania
    • Chester County
      • East Bradford Township
Shepard et al. (2)
Charles Upham Shepard On aquacreptite
    • Philadelphia County
      • Hestonville
pg. 234 +1 other reference
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