http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2401106-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7424e6f9767330403d283c09f8246bf |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-12 |
| filingDate | 1974-01-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_524b7266551aa83aca8520cd7eb21eec http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6f4bed248caac9561b60b50f00a1329e |
| publicationDate | 1975-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-2401106-A1 |
| titleOfInvention | METHOD FOR MANUFACTURING CITRINE CRYSTALS |
| abstract | Prodn. of citrine crystals under hydrothermal conditions in a high-pressure autoclave with a temp. gradient, with the use of nucleating quartz crystal plates oriented parallelly (or at an angle not exceeding 20 degrees) to the crystallographic pinacoid plane (0001), from salt solns. using crystalline quartz as a starting material, is improved by adding to the soln. 2-20 g/l, (pref. 10 g/l) of metallic iron and 1-20 g/l (pref. 5 g/l) of an alkali metal nitrite or nitrate (pref. LiNO2 or LiNO3) or KMnO4, and carrying out the process in an aq. 5-10 wt. % K2CO3 soln. at 300-345 degrees C (pref. 335 degrees C) under a press. of 300-1500 kg/cm2(pref. 1500 kg/cm2), the growth speed being 0.1-1mm (pref. 0.5-0.6mm) per 24 hr. Semi-precious stones for use in jewellery with uniform colouration. |
| priorityDate | 1974-01-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.